Let's get James to do a challenge like Heather, Frazer and Mark have done in the past! For example Mark completed the Norseman, Frazer did the Celtman, Heather recently did the crazy Swedish SwimRun world championship. We want to see what James can do and keep inspiring us :D
Do Ironman Waco October 15th and then do IM Waco 70.3 the next day on October 16th. I agree that this should probably be James challenge! Way to go Heather, you are a machine!
I still think a self supported full Tri but through mountain trails 🥳. Lots of vert 🏔! Some good old trail running and mountain biking 💪🏽. Epic night running and maybe some biking in the dark too. Filtering water and relying only on the fuel you’re carrying.. sounds pretty evil to me 😜.
A simple challenge, who can run the fastest point to point 1/2 marathon from three separate locations but they must keep their heart rate in Zone 2. Anything below or above will add penalties to their overall time .
There’s a reason Heather was an Olympian… elite mental strength. My new mantra when in a dark place during training and racing “Be more like Heather” 💪🤯
Whoa, Heather! Absolutely amazing! You are such an inspiration. Sure you are fast and physically accomplished, but the mental toughness is astonishing. Heroic!!!👏👏👏
I have no words... I'm sitting here watching Heather do her unfueled Ironman whilst I eat a hearty meal and I couldn't believe what I was seeing! I cannot imagine that kind of fortitude. You're an inspiration!
WOW! I'm speechless. The empath in me was crying when James called it quits followed up by Heather being terribly cold and miserable. Ive raced been freezing and could only imagine how they were feeling being cold/ wet/ and no fuel. Heather absolutely crushed it! I was rooting for her to just keep moving but I'm so incredibly in awe that she made it with 9km to go! wow!
damn. don't know what else to day. great job Heather. the mental strength you need to go 10 hours at that pacing w/out any caloric intake is unreal. truly inspiring
But how long was the fast? They said the last time they ate was last night so was that eight hours ago was it 12 hours ago? I run a 5K every single day while fasting and usually that time at least 12 to 16 hours of fasting before I run
@Beastbombshell I don’t disagree with you. My question was how long was the fast? And I should’ve said I run at least a 5K every day most days it’s a 10K. Plus body, core work
Been watching GTN for years, you all continue to educate and entertain. From newbie to experienced triathlete, GTN has been the staple show for triathletes.👍🏽
Amazing! Cold and rain on the bike is the worst even with proper fueling. What an effort. Fascinating that Heather was even able to start the run then actually felt better as the fat burning really kicked in. Well done both of you, especially Heather!
Heather is a warrior!! Kudos to James for the impressive effort. I would be interested to know how was the recovery in the following days? How does the recovery compare to a similar effort with proper fuelling?
Before I even watch this, I know heather will be absolutely fine. I’ve seen too many endurance TH-cam videos and she has been on the move for 5 hours and casually announces she has only had 1 jelly baby!
Right but how long did they fast? They said the last time they had eaten it was last night. But was that 12 hours ago was it 8hours ago? I usually work out at least four or five times a week while fasting for at least 12 to 16 hours before I work out.
@@HH-gv8mx I love how smug people get about fasting/intermittent fasting even though there's minimal science behind it and for every 1 study suggesting a benefit there are 20 suggesting the opposite
@@nk-dw2hm I have only heard about the benefits of intermittent fasting. I’ve never read one study that says anything different. You were the first person ever even heard make such a comment. What are the negatives of intermittent fasting?
When discussing a master's thesis topic with my mentor, I proposed a training protocol in a glycogen depleted state to see if the body could become more efficient at using carbohydrates. He suggested that mostly it would just make subjects feel like garbage and they'd learn that they don't like exercising while glycogen depleted. It would also be hard to get subjects to come back repeatedly to feel like garbage. So I did a different thesis. This looks horrible. And a massive kudos for what y'all completed
Wouldn't that just be ketosis? Loads of people train in a ketogenic state in order to adapt and have more stable energy during sport. I'm actually surprised this video didn't mention any of that.
Some serious grit from both Mark and Heather! That being said, this is the coolest video ever from GTN and I’ve been loving your content for a long time! Heather was insanely inspirational - that was sooo awesome! What a beast!
You guys work so hard to give us outstanding content. Thank you for your suffering. This was so over-the-top that perhaps it could be cross-uploaded to GCN. Heather is basically Wonder Woman to me; that's some real grit.
Hats off to both of you for even trying this. James, I’m sorry the weather was as cold as it was as I am confident that you would have been able to push thru a bit longer if not for that. Heather, that was truly awesome, even your pacing was clockwork. Definitely indicative of very strong aerobic fitness/efficiency (low HR, fat burning zone at those paces!). As I said, hats off!
What a journey! Heather.. just wow!! You are The Real Wonder Woman 💪🏽. That was pure awesomeness. Can’t forget Hangry James 😜.. that was darn good effort too 🤙🏽. Thank y’all for taking us on another adventure. Crazy watching y’all go through the same emotions that we go through (just at a faster pace 😅). Weather seemed to have impacted you for sure. Once the sun was out, the mood n energy changed. Y’all are awesome.
I did a 20k run the other evening (before dinner) after skipping breakfast and lunch and no bars/gels and was pretty chuffed: this puts that into perspective! Well done guys!
That was inspirational from you both very well done both solid efforts. Im training for my 2nd IM 70.3 while suffering effects of depression and you guys have truely inspired me thankyou
Even with ideal conditions this would be extremely daunting, but in those conditions... brutal. Hats off on to both of you!! Glad to hear for safety you were wearing the cgms.. And I hope that information can help in understanding the processes involved to help those (diabetics) that have to deal with the highs/lows manually every day (exercising or not).. and for others to get a better understanding of what it is like with for those that do.
Also, I hope you are able to continue wearing the cgms for at least a few days after that to monitor your levels as the stress/eating could having varying impacts.. for example, could stay low, could spike etc. although you may not really know if not having a baseline to start from.. but knowing the numbers (like when in the 60s) feels like helps to recognize that
Heather, I was literally rooting for you the whole way. It's such a shame you didn't go to the end, but as you said yourself, "What's the point?" There's no point killing yourself for something that, at the end of the day doesn't mean anything. You did absolutely incredible. Every so often you see someone, and there is nothing else you can do but take your hat off to them - that was genuinely phenomenal. That being said though; although "it didn't mean anything"; what it does mean, is when you're in an actual race, where you're well fuelled but struggling; you now know (if you didn't already know) that you have an extra little bit left in the tank that you can dig into; to push you on. Well done. Seriously well done. That was amazing.
I remember asking this question in GTN coach's corner on a fasted state attempt on an Ironman distance. Thanks for making a video and that too in the extreme weather. Great inspiration you guys are.
Wow Heather, I take my hat off to you! And to James too, it took a lot of grit to get as far as you both did. Kudos and respect to you both. And Heather just wow, amazing.
Amazing Heather! Really looks like what one goes through when having GI issues during an ultra - can't stay warm, low energy, sluggish. Even James dizziness feels like the biking version of 'zombie-walking' which happens when you're at your lowest and just stumble around...
The results and conclusion were what I expected.It would be interesting to see the difference if you both were in fat burning metabolism for at least 2 weeks prior to the experiment rather than expect your body to switch in the midst of a big effort. Kudos for what you accomplished.
Brilliant video - I completed the 70.3 there this year but had the benefit of the sun and fuel. But, what a lovely course - you have to revisit it in the sun! Well done to you both - what a challenge! But, hats of to you Heather! Frigging amazing mental strength to keep going - we've all seriously bonked and know how hard it is. AMAZING!
The bike looked horrible and to see you both suffering and presenting at the same time as well as trying to ride safely in the wet, hats off to you both 👊💥👊💥
Heather is no more negative without any fuel than most people are during an Ironman. Only thinking of stopping that late is hectic. Crazy but well done.
Wow!! Well done on the challenge and especially Heather, for just sucking it up and showing absolute grit and mental toughness!! But I feel you all were not prepared for the weather! The challenge was just to do an Ironman without fuel so why suffer in the rain? Couldn’t you have just dressed warm? May be that would have slightly made things better ? It just then would have been only the lack of fuel instead of now lack of fuel and not prepared for bad weather.
That was incredible, I was rooting for you guys to stop because it felt so unsafe on the bike. But the mental strength was inspiring and just out of this world. Wow.
As someone who has experimented with fat adaptation and fasted training, I sympathize with James 100%! So kudos and nothing but kudos to Heather. That must've been brutal!
Most impressive triathlete of 2022 goes to HEATHER!!! Though I quite liked Hangry James, that was so impressive I think you'll be reclassified as something other than human.
Heather's glucose time plot shows the tendency of the liver to generate glucose when deep into an event. This is what ketogenic century runners experience. The difference is that they start keto adapted (takes about 3 months) for their sport and supplement gels and other carbs so that they can keep the pace high. If they experience gastric distress, then they have a strong ketone burning training to rely on. Congrats to both of you for making it as far as you did. It is lonely out there.
Great to hear James' 'crisis mode' recovery strategy! That's some great advice. And good on him for being sensible and pulling the pin to avoid hypothermia. Being an Australian who did 2022 Norseman NXTRI (-2 degrees and ripping winds on the Hardangervidda, without changing into dry clothes at T1), I've been there too, but fortunately fully fuelled and able to access some thermal kit. Good work for staying safe 🙌
That was nuts! Cudos fir the hardcore perseverance and protecting yourselves by stopping and calling it to look after your bodies. Well it’s given me some motivation for my up coming Ironman that I’ll definitely be fuelling on.
this is me during tri's. I'm diabetic so this is my struggle! And i don't inject insulin. I take a pill version of it so I can only have 15g carbs at a time. I'm struggling on the nutrition aspects actually. And when your blood sugar drops, SO DOES YOUR BLOOD PRESSURE. So it can get...dodgy (and dangerous). I've actually nearly passed out after a race. While I'm moving, my blood sugar raises, i think this is due in part to cortisol. It's when you stop (aka in transition) where you're in trouble. FYI. And continuous glucose testing meters ARE NOT ACCURATE for RAPID blood sugar drops or raises (they are 5 min behind your actual reading). So by the time the dip registers, you might be in serious trouble. And you're right, the headache is the warning sign. If you ignore it, the next symptom is your vision is impacted. meaning everything becomes insanely bright like the world is suddenly backlit by the world's strongest LED lights. You can only see bright lights or darkness. NO COLORS. Then dizziness. Then lights out (meaning you pass out). After finishing, I can eat carbs (lots of them -- more than 15g) and my blood sugar will not rise that day. it takes me about 48 hours to fully recover.
Oh my god, kudos to both of you for attempting it and Heather, you're a legend for pushing through without any fuel. Got an Ironman coming up in less than 4 weeks so this has been a great watch and gave me some tips on self-talk.
I agree. I wonder in particular, what explains James' lower start. Is it the nutrition from the previous day? Something else? What about the way the curves went through the day: Heather was cold and so was James probably. Could Heather be more cold adapted but would James, being more massive, be better at retaining heat? There is so much to look into...
Goodness!! Heather was my hero before but now she's my hero twice or three times over. Fantastic work, I'm glad you were being as safe as you could about it, but damn!
Heather has a will of steel, my God. 😱 As someone has already said, I'm not a in a very good place right now in my life (regarding health, sport and othe things), but this video has really inspired my to put a bit more intensity in what I'm doing to turn things around. Thanks to Heather for the lesson in sheer willpower.
This was really amazing on Heather's part, close to superhuman actually in that kind of weather! Looks like even the Universe took a note when the weather improved for the final leg. Just a bit of a remark: not sure who's done the research for that quick "science intermezzo" by Mark but one can't under no circumstances fuel any activity solely by fat, whether alimentary or from the body reserves. To burn fat or more precisely acetyl-CoA from breakdown of fatty acids, the body requires some glucose to be utilized as well. Without any external supply available and after exhausting one's glycogen stores, this vital glucose will come almost exclusively from proteins of the muscle tissue.
Mad respect to you guys! I'm following a fasting regime whilst preparing for a marathon and considering running one while on a fast. After your experiment, I feel like reconsidering my approach :D
I think you have a great goal. Especially if you all ready train fasted, your body will allready be adapted. I would recommend taking electrolytes, in the absence of sugar intake you can take in more than regular during a marathon. Good luck what ever your strategy will be.
Once you are fat adapted it’ll be a piece of cake! I’ve been running up to half marathon fasted, last meal around 2pm the day before and I don’t even think about food till I’m finished let alone get hungry. As mentioned electrolytes are key. I like to have lots of veggies, especially spinach for the potassium. Make your own drink, I have salt, lemon juice and apple cider vinegar(with mother). It tastes great and works amazingly. Good luck!
My god. I did a 70.3 yesterday and ate 450g carbs during (it took me just under 6hrs as I am a slow man). I needed every gram! This performance from Heather is astonishing.
Women are just designed for survival. Endurance is the one place where women can excel relative to men, get less fatigued for the same relative effort and this shows, also can endure dire conditions and bounce back better than men. Add to that an olympic mentality and you get this amazing performance. Fuel is so important :) ha ha
Whoa Heather, absolutely smashed it. Your performance just shows what capacity for endurance women can have and why women's sport should be in the main stream media.
Well done to you both and especially Heather, such resilience! The only thing that spoilt it and nearly made me turn off was the Zwift ads; so many of them it seriously affected the content.
I do train my body to use body fat when training: no fuel before nor during training. I've noticed that when racing this gives me a really strong response to fueling: a little sugar makes wonders. Before I did this kind of training, I needed much more fuel while racing and the performances where inferior.
My philosophy as well. By training your body to go without 'fuel' I believe you will never hit a sudden wall during an event as your body will know how to adapt when it runs out of 'carb' energy and will switch to ketones with ease.
i've done a lot of fasted riding 5 plus hours no food etc, but i am by no means doing it with any semblance of performance, tends to be very easy riding barring a few nasty hills near where i live, if i know i have to go fast then i fuel it, ketosis is something you build up to over time not smash into. kudos guys that was mental. ooh btw i think i read somewhere that the body can produce blood sugar from protein if that's correct then you were probably burning muscle when your blood sugar was rising.
22:30 probably Gluconeogenesis, where your body starts to convert stored energy into glucose again. Is the human body one great adaptation machine, or what 😁
What other insane challenges would you like to see us take on?
Let's get James to do a challenge like Heather, Frazer and Mark have done in the past! For example Mark completed the Norseman, Frazer did the Celtman, Heather recently did the crazy Swedish SwimRun world championship. We want to see what James can do and keep inspiring us :D
Do Ironman Waco October 15th and then do IM Waco 70.3 the next day on October 16th. I agree that this should probably be James challenge! Way to go Heather, you are a machine!
I still think a self supported full Tri but through mountain trails 🥳. Lots of vert 🏔! Some good old trail running and mountain biking 💪🏽. Epic night running and maybe some biking in the dark too. Filtering water and relying only on the fuel you’re carrying.. sounds pretty evil to me 😜.
A simple challenge, who can run the fastest point to point 1/2 marathon from three separate locations but they must keep their heart rate in Zone 2. Anything below or above will add penalties to their overall time .
Winter is coming. Indoor iron distance? Pool + power trainer + threadmill
There’s a reason Heather was an Olympian… elite mental strength. My new mantra when in a dark place during training and racing “Be more like Heather” 💪🤯
28:57 "keep going at a really low intensity" aka she ran 33k at my 5k pace (after having already been out there for 7 hours without fuel) 😂😂
Whoa, Heather! Absolutely amazing! You are such an inspiration. Sure you are fast and physically accomplished, but the mental toughness is astonishing. Heroic!!!👏👏👏
Totally impressive indeed
Heather is a boss! Total baller!
She deserve a Kona Slot after such a « BigDay training session » … or at least a Kona Diary presented by Heather for the Woman Race should be enormous
But how long was there fast? They said they had eaten last night. That could’ve been eight hours ago or 12 hours ago
Respect
Heather just showed that difference between a professional and an olympian. You're a beast!
Heather is so good yet humble. Such an inspiration.
Heather, that was absolutely epic. mad respect
Heather is my new hero and I have no interest in doing a triathlon, but loved the warts and all approach to this. Good to show the honesty.
I have no words... I'm sitting here watching Heather do her unfueled Ironman whilst I eat a hearty meal and I couldn't believe what I was seeing! I cannot imagine that kind of fortitude. You're an inspiration!
WOW! I'm speechless. The empath in me was crying when James called it quits followed up by Heather being terribly cold and miserable. Ive raced been freezing and could only imagine how they were feeling being cold/ wet/ and no fuel. Heather absolutely crushed it! I was rooting for her to just keep moving but I'm so incredibly in awe that she made it with 9km to go! wow!
spoilers!
Give it a rest with woke virtue signalling. An “empath”? Just makes you sound like an ass.
damn. don't know what else to day. great job Heather. the mental strength you need to go 10 hours at that pacing w/out any caloric intake is unreal. truly inspiring
Heather is such a freaking monster. Heads off to her big time!! Very impressive
I don't normally comment on anything, but what an amazing effort from Heather! Truly inspirational!
Heather is a beast!
irl Super-girl
But how long was the fast? They said the last time they ate was last night so was that eight hours ago was it 12 hours ago? I run a 5K every single day while fasting and usually that time at least 12 to 16 hours of fasting before I run
@Beastbombshell I don’t disagree with you. My question was how long was the fast? And I should’ve said I run at least a 5K every day most days it’s a 10K. Plus body, core work
@@HH-gv8mx You cannot compare a 5k run with a full ironman distance... 🙂
@@joedubai1211 i’m very well aware of that. I just wanted to know how long the fast was for.8 hours I’m assuming
Heather & James well done on doing this challenge. Total respect for you both.
Been watching GTN for years, you all continue to educate and entertain. From newbie to experienced triathlete, GTN has been the staple show for triathletes.👍🏽
Thanks Norman - glad you enjoy the content!
Amazing! Cold and rain on the bike is the worst even with proper fueling. What an effort. Fascinating that Heather was even able to start the run then actually felt better as the fat burning really kicked in. Well done both of you, especially Heather!
Incredible work from you both, especially for Heather’s mental fortitude battling through the run, just incredible
Heather is a warrior!! Kudos to James for the impressive effort. I would be interested to know how was the recovery in the following days? How does the recovery compare to a similar effort with proper fuelling?
Before I even watch this, I know heather will be absolutely fine. I’ve seen too many endurance TH-cam videos and she has been on the move for 5 hours and casually announces she has only had 1 jelly baby!
Classic!
Right but how long did they fast? They said the last time they had eaten it was last night. But was that 12 hours ago was it 8hours ago? I usually work out at least four or five times a week while fasting for at least 12 to 16 hours before I work out.
@@HH-gv8mx I love how smug people get about fasting/intermittent fasting even though there's minimal science behind it and for every 1 study suggesting a benefit there are 20 suggesting the opposite
@@nk-dw2hm I have only heard about the benefits of intermittent fasting. I’ve never read one study that says anything different. You were the first person ever even heard make such a comment. What are the negatives
of intermittent fasting?
@@HH-gv8mxyou don’t do a full Ironman though do you?😂 get real.
When discussing a master's thesis topic with my mentor, I proposed a training protocol in a glycogen depleted state to see if the body could become more efficient at using carbohydrates. He suggested that mostly it would just make subjects feel like garbage and they'd learn that they don't like exercising while glycogen depleted. It would also be hard to get subjects to come back repeatedly to feel like garbage. So I did a different thesis. This looks horrible. And a massive kudos for what y'all completed
Wouldn't that just be ketosis? Loads of people train in a ketogenic state in order to adapt and have more stable energy during sport. I'm actually surprised this video didn't mention any of that.
Some serious grit from both Mark and Heather! That being said, this is the coolest video ever from GTN and I’ve been loving your content for a long time! Heather was insanely inspirational - that was sooo awesome! What a beast!
OMG Heather!!! You're a Hero!! Absolutely incredible - so proud of you! Who cares about those 9km. I cannot believe you managed to do that!!!!
You guys work so hard to give us outstanding content. Thank you for your suffering. This was so over-the-top that perhaps it could be cross-uploaded to GCN. Heather is basically Wonder Woman to me; that's some real grit.
Hats off to both of you for even trying this. James, I’m sorry the weather was as cold as it was as I am confident that you would have been able to push thru a bit longer if not for that. Heather, that was truly awesome, even your pacing was clockwork. Definitely indicative of very strong aerobic fitness/efficiency (low HR, fat burning zone at those paces!). As I said, hats off!
What a journey! Heather.. just wow!! You are The Real Wonder Woman 💪🏽. That was pure awesomeness. Can’t forget Hangry James 😜.. that was darn good effort too 🤙🏽. Thank y’all for taking us on another adventure. Crazy watching y’all go through the same emotions that we go through (just at a faster pace 😅). Weather seemed to have impacted you for sure. Once the sun was out, the mood n energy changed. Y’all are awesome.
I did a 20k run the other evening (before dinner) after skipping breakfast and lunch and no bars/gels and was pretty chuffed: this puts that into perspective!
Well done guys!
That was inspirational from you both very well done both solid efforts.
Im training for my 2nd IM 70.3 while suffering effects of depression and you guys have truely inspired me thankyou
When Heather started the run I was at the edge of my seat. Huge respect!
Even with ideal conditions this would be extremely daunting, but in those conditions... brutal. Hats off on to both of you!! Glad to hear for safety you were wearing the cgms.. And I hope that information can help in understanding the processes involved to help those (diabetics) that have to deal with the highs/lows manually every day (exercising or not).. and for others to get a better understanding of what it is like with for those that do.
Also, I hope you are able to continue wearing the cgms for at least a few days after that to monitor your levels as the stress/eating could having varying impacts.. for example, could stay low, could spike etc. although you may not really know if not having a baseline to start from.. but knowing the numbers (like when in the 60s) feels like helps to recognize that
Heather, I was literally rooting for you the whole way. It's such a shame you didn't go to the end, but as you said yourself, "What's the point?" There's no point killing yourself for something that, at the end of the day doesn't mean anything. You did absolutely incredible. Every so often you see someone, and there is nothing else you can do but take your hat off to them - that was genuinely phenomenal. That being said though; although "it didn't mean anything"; what it does mean, is when you're in an actual race, where you're well fuelled but struggling; you now know (if you didn't already know) that you have an extra little bit left in the tank that you can dig into; to push you on. Well done. Seriously well done. That was amazing.
I remember asking this question in GTN coach's corner on a fasted state attempt on an Ironman distance. Thanks for making a video and that too in the extreme weather. Great inspiration you guys are.
Wow Heather, I take my hat off to you! And to James too, it took a lot of grit to get as far as you both did. Kudos and respect to you both. And Heather just wow, amazing.
Amazing Heather!
Really looks like what one goes through when having GI issues during an ultra - can't stay warm, low energy, sluggish. Even James dizziness feels like the biking version of 'zombie-walking' which happens when you're at your lowest and just stumble around...
The results and conclusion were what I expected.It would be interesting to see the difference if you both were in fat burning metabolism for at least 2 weeks prior to the experiment rather than expect your body to switch in the midst of a big effort. Kudos for what you accomplished.
Brilliant video - I completed the 70.3 there this year but had the benefit of the sun and fuel. But, what a lovely course - you have to revisit it in the sun! Well done to you both - what a challenge! But, hats of to you Heather! Frigging amazing mental strength to keep going - we've all seriously bonked and know how hard it is. AMAZING!
Heather, that was absolutely incredible. Insane. Glad you didn't break yourself completely.
Heather that was extraordinary! Big respect to both of you for hanging in there. I know the feeling, it sucks.
The bike looked horrible and to see you both suffering and presenting at the same time as well as trying to ride safely in the wet, hats off to you both 👊💥👊💥
Oh my god, Heather is AMAZING!!! what an incredible human being - the mental strength anyone can aspire to
Heather is no more negative without any fuel than most people are during an Ironman. Only thinking of stopping that late is hectic. Crazy but well done.
Heather you are an absolute boss! This was an amazing feat of endurance and mental strength.
Wow!! Well done on the challenge and especially Heather, for just sucking it up and showing absolute grit and mental toughness!!
But I feel you all were not prepared for the weather! The challenge was just to do an Ironman without fuel so why suffer in the rain? Couldn’t you have just dressed warm? May be that would have slightly made things better ? It just then would have been only the lack of fuel instead of now lack of fuel and not prepared for bad weather.
That was incredible, I was rooting for you guys to stop because it felt so unsafe on the bike. But the mental strength was inspiring and just out of this world. Wow.
As someone who has experimented with fat adaptation and fasted training, I sympathize with James 100%! So kudos and nothing but kudos to Heather. That must've been brutal!
Most impressive triathlete of 2022 goes to HEATHER!!! Though I quite liked Hangry James, that was so impressive I think you'll be reclassified as something other than human.
Heather's glucose time plot shows the tendency of the liver to generate glucose when deep into an event. This is what ketogenic century runners experience. The difference is that they start keto adapted (takes about 3 months) for their sport and supplement gels and other carbs so that they can keep the pace high. If they experience gastric distress, then they have a strong ketone burning training to rely on. Congrats to both of you for making it as far as you did. It is lonely out there.
Wow! Hats off to you both. That was an intense challenge and impressive feat to make it that far.
This was an interesting experiment. Way to go, both of you!
Great to hear James' 'crisis mode' recovery strategy! That's some great advice. And good on him for being sensible and pulling the pin to avoid hypothermia. Being an Australian who did 2022 Norseman NXTRI (-2 degrees and ripping winds on the Hardangervidda, without changing into dry clothes at T1), I've been there too, but fortunately fully fuelled and able to access some thermal kit. Good work for staying safe 🙌
Great going, & some nice shots of Lake 32!
I don't uderstand why you'd try to ride in that weather in just a tri suit though!
That was nuts!
Cudos fir the hardcore perseverance and protecting yourselves by stopping and calling it to look after your bodies.
Well it’s given me some motivation for my up coming Ironman that I’ll definitely be fuelling on.
Crazy! That’s an insane undertaking! Awesome effort by Heather!
this is me during tri's. I'm diabetic so this is my struggle! And i don't inject insulin. I take a pill version of it so I can only have 15g carbs at a time. I'm struggling on the nutrition aspects actually. And when your blood sugar drops, SO DOES YOUR BLOOD PRESSURE. So it can get...dodgy (and dangerous). I've actually nearly passed out after a race. While I'm moving, my blood sugar raises, i think this is due in part to cortisol. It's when you stop (aka in transition) where you're in trouble. FYI. And continuous glucose testing meters ARE NOT ACCURATE for RAPID blood sugar drops or raises (they are 5 min behind your actual reading). So by the time the dip registers, you might be in serious trouble. And you're right, the headache is the warning sign. If you ignore it, the next symptom is your vision is impacted. meaning everything becomes insanely bright like the world is suddenly backlit by the world's strongest LED lights. You can only see bright lights or darkness. NO COLORS. Then dizziness. Then lights out (meaning you pass out). After finishing, I can eat carbs (lots of them -- more than 15g) and my blood sugar will not rise that day. it takes me about 48 hours to fully recover.
The two of you are incredible. Heather you are on another level, much respect to the both of you 👏
I'm on my knees. Absolute respect to both of you !
Fantastic effort both of you, Heather, you are incredible, that was a fantastic effort! Well done.
Oh my god, kudos to both of you for attempting it and Heather, you're a legend for pushing through without any fuel. Got an Ironman coming up in less than 4 weeks so this has been a great watch and gave me some tips on self-talk.
Good luck with the Ironman - hope it goes well!
Thank you Heather you are really a inspiration. Everybody watching this will find some extra Heather Power during the next competition.
Amazing work!! I'd like to understand the science of what's happening physiologically a little better. More GTN science videos!
I agree. I wonder in particular, what explains James' lower start. Is it the nutrition from the previous day? Something else? What about the way the curves went through the day: Heather was cold and so was James probably. Could Heather be more cold adapted but would James, being more massive, be better at retaining heat? There is so much to look into...
This is a brilliant experiment! Especially when others can do it for you!
Goodness!! Heather was my hero before but now she's my hero twice or three times over. Fantastic work, I'm glad you were being as safe as you could about it, but damn!
Heather has a will of steel, my God. 😱
As someone has already said, I'm not a in a very good place right now in my life (regarding health, sport and othe things), but this video has really inspired my to put a bit more intensity in what I'm doing to turn things around.
Thanks to Heather for the lesson in sheer willpower.
What an amazing effort from both of you, I've always got respect for those who have the guts to find their limits.
Heather, what a super woman 😳
Awesome effort! Would love to see Heather race an Ironman after seeing this
Absolute Warrior Goddess. No question. Mad props, Heather.
This was really amazing on Heather's part, close to superhuman actually in that kind of weather! Looks like even the Universe took a note when the weather improved for the final leg.
Just a bit of a remark: not sure who's done the research for that quick "science intermezzo" by Mark but one can't under no circumstances fuel any activity solely by fat, whether alimentary or from the body reserves. To burn fat or more precisely acetyl-CoA from breakdown of fatty acids, the body requires some glucose to be utilized as well. Without any external supply available and after exhausting one's glycogen stores, this vital glucose will come almost exclusively from proteins of the muscle tissue.
Mad respect to you guys! I'm following a fasting regime whilst preparing for a marathon and considering running one while on a fast. After your experiment, I feel like reconsidering my approach :D
I think you have a great goal. Especially if you all ready train fasted, your body will allready be adapted.
I would recommend taking electrolytes, in the absence of sugar intake you can take in more than regular during a marathon.
Good luck what ever your strategy will be.
Once you are fat adapted it’ll be a piece of cake! I’ve been running up to half marathon fasted, last meal around 2pm the day before and I don’t even think about food till I’m finished let alone get hungry. As mentioned electrolytes are key. I like to have lots of veggies, especially spinach for the potassium. Make your own drink, I have salt, lemon juice and apple cider vinegar(with mother). It tastes great and works amazingly. Good luck!
My god. I did a 70.3 yesterday and ate 450g carbs during (it took me just under 6hrs as I am a slow man). I needed every gram! This performance from Heather is astonishing.
Under 6hrs is everything but slow. 99% are not able to finish!
@@ralfmimoun2826 that's kind! I do just struggle a bit on the bike and it's a long time out there.
kudos to both for this experiment. Heather amazing effort!
She is increadible. Well done Heather honestly! Wow
Women are just designed for survival. Endurance is the one place where women can excel relative to men, get less fatigued for the same relative effort and this shows, also can endure dire conditions and bounce back better than men. Add to that an olympic mentality and you get this amazing performance. Fuel is so important :) ha ha
Absolutely amazing! Hats off to both of you… and Joe Dubai is spot on: Heather is a beast!
Whoa Heather, absolutely smashed it. Your performance just shows what capacity for endurance women can have and why women's sport should be in the main stream media.
Thanks Reuben.
Suggestion for next "without" venture ...... a solo skydive without a parachute !!
Hats off for this one. Did the whole bike on nothing as an experiment once. Felt pretty rough by the end of that. But this is nails
Well done to you both and especially Heather, such resilience! The only thing that spoilt it and nearly made me turn off was the Zwift ads; so many of them it seriously affected the content.
Oh man! Props to you guys for doing this challenge. And, man, Heather is amazing! What a superwoman! 😮
I can't even run 1km.Not even joking.Im that weak.Congrats heather, you're a true inspiration.Currently watching while doing 100squats
I do train my body to use body fat when training: no fuel before nor during training. I've noticed that when racing this gives me a really strong response to fueling: a little sugar makes wonders. Before I did this kind of training, I needed much more fuel while racing and the performances where inferior.
My philosophy as well. By training your body to go without 'fuel' I believe you will never hit a sudden wall during an event as your body will know how to adapt when it runs out of 'carb' energy and will switch to ketones with ease.
Absolutely enjoyed it ❤️. Thanks for doing this experiment.
This the best GTN film for a long time . Just Brilliant only topped by Heather’s performance
That is absolutely incredible. What amazing, inspiring people.
WOW. Awesome achievement Heather. Super effort from James also.
Wow Heather, great effort...completely bonkers but very impressive. Really well done and now you know how dark you can go and still do well!
This is a great challenge! I have to say, that many repeated laps in each leg would drive me absolutely bonkers.
Strong efforts!
Thanks a ton!
Legit cheered when you got to the finish line Heather. What a fighter
You guys are awesome!! Loved every bit of this video. Please don’t extreme things however keep going on with your regular things.
That was BADASS! Massive respect! So cool
Really impressive!!! The pure idea seems to be insane, but it is a great performance!💪💪💪
Heather you are a warrior!
OMG Heather, you are awesome! That was amazing!
That was Olympian Heather that showed up for this challenge. Nice work.
Heather, absolutely smashed it!! The greatest!! 🎉😊
Awesome effort! Not surprised you made the correct decision at the end. 😃👍
Heather is a rockstar! Poor James. I really think he psyched himself out.
Thank you for all you do, guys.
i've done a lot of fasted riding 5 plus hours no food etc, but i am by no means doing it with any semblance of performance, tends to be very easy riding barring a few nasty hills near where i live, if i know i have to go fast then i fuel it, ketosis is something you build up to over time not smash into. kudos guys that was mental. ooh btw i think i read somewhere that the body can produce blood sugar from protein if that's correct then you were probably burning muscle when your blood sugar was rising.
I did 90 mile on a bicycle without food and had to stop around mile 70 for a 10 - 15 sit down was absolutely knackered
22:30 probably Gluconeogenesis, where your body starts to convert stored energy into glucose again.
Is the human body one great adaptation machine, or what 😁
Very impressive! Really like these type of videos
Thanks Hidde!