Being a certified fitness trainer, I must confess that I keep my knowledge of human anatomy up to date from this channel. Thank you for these valuable videos.
I been lifting weights (mostly heavy) for about 15 years, over a year ago I started with mma training, it’s amazing to see how the body adapts itself, mma is a mix of training, you need endurance, you need to be strong and fast so basically you train all the muscle fibers, energy systems and trying to find best balance that would suit the needs of that sport, body is an amazing machine. Love your content!
Excellent, I studied these concepts already but it was a sisyphean task to remember it, but the visualization and the practical relations just might do it! Thank you!
This was really cool, I did track in high school, I was not a good sprinter, and I did not have the endurance of the cross country kids. But I crushed people in the 800. Learning about this third Type IIA fiber explains a lot to me.
I m a male type 2 predominant. I struggle to keep up with endurance training. For this matter, my FTP on the cycling power/watts calculation is just “good”. Even though I have been training for 3 years I hardly touched 3/watts kg. Now when it comes to repeating sprinting uphill or all out 2 minutes max power output, although very exhausting, I feel great about it and perform well, actually better than endurance alone.
Thanks for all your hard work. I'm not a medical pro, but I love your channel because it gives good info on fitness and health for regular folks like me. I also get useful tips from Dr. Aaron Horschig's Squat University channel. Much love and best wishes.
I have been a runner for many years now, running at least 6km’s a day, but with the onset of menopause I find that running is not helping anymore so I have started strength training . It will be interesting to see how my body adapts to these changes
You need transdermal bio identical hrt ( estradiol, progesterone and testosterone) when no medical contra indication as can be estradiol sensitive breastcancer. Dr. Louise Newson UK is giving awsome explanations. Check her out.
This finally explains why I can swim laps for an hour with no breathlessness, but can only hula hoop for a handful minutes before I'm puffed out and sweating.
wonder how much the genetic fast/slow twitch fibre composition in the vocal chords(thyroarythenoid) affects singing ability? presumably those with more fast twitch have more powerful voices and thicker easier to adduct vocal chords than those with abundance of slow twitch?
It's a big reason I do both heavy lifts as we all higher rep days. Building both IIa and IIx help for long term functional strength. Yes, I'm a total nerd in the gym
Do these fast-twitch muscle cells release glygocen when the body is running low on glucose and vice versa? Would having more of these muscles then help regulate blood sugar levels? I.e. "do bodybuilders get hangry?"
Think about any sprint or explosive effort where you felt dizzy and wanted to vomit at the end. That’s part of you blowing through the glycogen so fast and before you can recruit other forms of energy.
Since skeleton muscle cells are one of the few cell types that don't divide, there is no real hyperplasia in human skeleton muscles (they mostly just grow thicker). However, new muscle cells can be generated from certain stem cells called satellite cells, but those mainly replace the damaged ones.
What fiber type does my judo where I have to do repeated high intensity, high load and high explosiveness actions for potentially back to back repeated 5 minute bouts?
How about if I spend 80% of my training working at slow twitch and 20% medium to fast twitch, will the fibres I have be better adapted at both or is there a trade off? Will I lose some of my enduring fibres working on speed or will both simply get stronger?
@@theljbrotherhood3553 Good question. Crossfit has opened my eyes to the potential of the human body. Crossfit has shown the ability to be strong and have great endurance.
Does it really matter? The consistency is what really matters. It isn't like you can tell your body to produce more fast twitch muscle fibers or slow twitch muscle fibers or hybrid.
@ Bloxian Depending on your goals, strength vs hypertrophy, your training will vary. Generally, strength is best trained with low reps (1-5) but not to failure whereas hypertrophy uses higher reps (5-30) training much closer to failure. Ultimately you have to learn what works best for you. Some good sources are: Jeff Nippard Mike Israetel Jeff Cavaliere Ryan Humiston Dr Milo Wolf. Lots of tips but consistency and good nutrition would be near the top.
Fast twitch fibers are more prone to atrophy for everyone by virtue of being larger and fatigueable (and, thus, also more prone to hypertrophy). Any population susceptible to atrophy and sarcopenia will see greater losses to fibers that have more to lose.
As we age, our fast-twitch muscle fibers-responsible for quick, explosive movements-shrink faster than slow-twitch fibers. This happens primarily because the nerves that signal these fast fibers tend to decline, so these muscles get less stimulation and weaken over time. Additionally, fast-twitch fibers aren’t used as much in everyday activities, which rely more on slow-twitch fibers for endurance. Without regular activation, fast-twitch fibers lose size and strength quickly. Finally, since fast-twitch fibers have less blood supply and endurance than slow-twitch fibers, they’re less resilient to aging and atrophy faster. By Ai
I also read that it’s also partially due to the way human physiology evolved in a world of scarce resources. Fast twitch fibers are the most energy and resource intensive. The body will attempt to maintain the bare minimum. That’s why it’s “use it or lose it.” You’re fitting 100,000’s years of evolution.
@scottessery100 he says there is another video about motor unit requirement, and I could not find it by just searching. But I DON'T know what YOU are thinking about 😂🤷♂️🤔.
Crediting so much to mitochondria . So much of what males are selected for. Plus according to every dogma . 100% of selection is on the male and 80% of development comes from the mother
Great video but you are 100% wrong that you can convert type 1 muscle fibers into fast twitch muscle fibers. Not even close. It will never happen!!!! I am going to make a video debunking what you just said. It's simply absurd. They could go back and forth in their own subtype, but there is no turning a slow fiber into a type 2X. Come on, man!!!!! In other words, you are claiming you can convert low-threshold motor units into high-threshold motor units. Simply absurd!!!! It's not happening! The only fibers that can do this are hybrid I/IIa/IIx fibers. And people are born with these. These specific fibers work back and forth in their own subtype. You are not converting a pure slow twitch fiber that does not contain myosin heavy chain isoform composition of a type 2X fiber into a pure fast twitch type 2 X fiber.
Use AI to create a secondary video of the same video, but the other video doesn’t use real muscle tissue from cadavers. Use a cartoonish version that looks similar. The reason is some of us don’t like what doctors have to do for a living, cause we’re squeamish with it. But we want your information.
Another steroid junkie for the thumbnail because those are the REAL men! 😂😂😂😂 WTF. I'm stronger than steroid taking people and I'm regular size, just 20 years of construction work! Don't believe me come work at my job! You'll be going home in 30 minutes.
Sorry for long answer but unfortunately this is the nature of the beast (social media, TH-cam etc). They have to get views and clicks to be successful and reach a larger audience. I don't agree with it but it goes with the territory. Unfortunately humans are drawn to the louder more showy types of things and people. You ever notice how people like the big mouth funny guy get more attention even though he is full of crap compared to the more reserved knowledgeable person? For example, Greg Doucette first did informative videos with a normal voice and got few clicks and it was not until he changed his voice and got more controversial and clickbaity that he blew up and is now a millionaire. Humans are flawed and we have to adapt accordingly.
!["สนธิ" ห่วงมีขบวนการปกป้อง "ทนายตั้ม" : [THE MESSAGE]](http://i.ytimg.com/vi/2GQNp3EoMc0/mqdefault.jpg)
Being a certified fitness trainer, I must confess that I keep my knowledge of human anatomy up to date from this channel. Thank you for these valuable videos.
Same. I've got tons of books to read and certifications to work on, but I love watching 3 - 6 videos a day with informative content such as this.
You should take the time to learn biomechanics
Perfect timing, I have an A&P exam on the muscular system in a few days. I just learnt all of this so this is a good recap.
I been lifting weights (mostly heavy) for about 15 years, over a year ago I started with mma training, it’s amazing to see how the body adapts itself, mma is a mix of training, you need endurance, you need to be strong and fast so basically you train all the muscle fibers, energy systems and trying to find best balance that would suit the needs of that sport, body is an amazing machine. Love your content!
Excellent, I studied these concepts already but it was a sisyphean task to remember it, but the visualization and the practical relations just might do it! Thank you!
Love all the exercise physiology related videos on your channel, keep it up!
As a professional athlete this was very informative! Thank you!
Quite informative. I learn and unlearn a lot from your channel daily. Thank you Institute of Human Anatomy.
You’re amazing bro thanks for listening!!!❤
This was really cool, I did track in high school, I was not a good sprinter, and I did not have the endurance of the cross country kids. But I crushed people in the 800. Learning about this third Type IIA fiber explains a lot to me.
"Great video! Thank you for this content!"
- 1500m track athlete aka fast oxidative-glycolitic user
As a professional athlete, I found this incredibly informative! Thank you so much for sharing this!
I m a male type 2 predominant. I struggle to keep up with endurance training. For this matter, my FTP on the cycling power/watts calculation is just “good”. Even though I have been training for 3 years I hardly touched 3/watts kg. Now when it comes to repeating sprinting uphill or all out 2 minutes max power output, although very exhausting, I feel great about it and perform well, actually better than endurance alone.
What kind of training did you do, and how did you eat for your training?
Thanks for all your hard work. I'm not a medical pro, but I love your channel because it gives good info on fitness and health for regular folks like me. I also get useful tips from Dr. Aaron Horschig's Squat University channel. Much love and best wishes.
Thank you jonathan❤
My muscles are all lazy twitch.
My muscles are all lazy, not even twitching
😂@@yourfellowhumanbeing2323
I have been a runner for many years now, running at least 6km’s a day, but with the onset of menopause I find that running is not helping anymore so I have started strength training . It will be interesting to see how my body adapts to these changes
You need transdermal bio identical hrt ( estradiol, progesterone and testosterone) when no medical contra indication as can be estradiol sensitive breastcancer. Dr. Louise Newson UK is giving awsome explanations. Check her out.
Does a sprinter or marathon runner beef make a tastier steak?
I need to know as well... for science. 😊
Cows from the mountains usually have a stiffer steak
The real scientific question for me is: Why am I bad at both strength and endurance 😢
Excellent presentation.. can you please share the study 📚of twins about the change in fiber type? Thank you
This finally explains why I can swim laps for an hour with no breathlessness, but can only hula hoop for a handful minutes before I'm puffed out and sweating.
finallyy yess!! thank you
Nice to see your co-host Jeffrey in this one, but maybe you could let him speak some of the time? ;)
😂he would probably just rattle on and on.
Excited for this!
I like that guy on you saying it's going to be a twitchy.
wonder how much the genetic fast/slow twitch fibre composition in the vocal chords(thyroarythenoid) affects singing ability? presumably those with more fast twitch have more powerful voices and thicker easier to adduct vocal chords than those with abundance of slow twitch?
It's a big reason I do both heavy lifts as we all higher rep days. Building both IIa and IIx help for long term functional strength. Yes, I'm a total nerd in the gym
agree
Type IIx and IIa muscle fibers can be converted to type I, but the reverse is not possible.
I wish, so very much, that I had the ability to study this scholastically, as opposed to TH-cam enthusiast
Do a video explaining creatine
Already did
Do these fast-twitch muscle cells release glygocen when the body is running low on glucose and vice versa? Would having more of these muscles then help regulate blood sugar levels? I.e. "do bodybuilders get hangry?"
so the fastest way to deplete glycogen storage is to perform explosive movements to activate the fast-twitch fibres
Think about any sprint or explosive effort where you felt dizzy and wanted to vomit at the end. That’s part of you blowing through the glycogen so fast and before you can recruit other forms of energy.
So, for being healthy we, ideally, need to do all types of training to include all of the muscle types?
Whatever training you choose will convert your fibers. The healthy minimum is 150mins cardio exercise and 2 days of weight training
As long as you're physically active with proper nutrition, you'll be healthy. You only need to workout these muscle types based on your goals.
Yes, I have my brother. I think he works out cause he has a lean, nice muscle, body. No, I am not, or neither is he like that.😊❤❤
Does the eye's muscles have more Type II fibers than type I?
Now i understand why my legs start burning after like 10 min jogging
Is there a way to test muscle type composition while still alive?
Rather than muscle hypertrophy or plasticity, i'm really interested in hyperplasia.
Resistance training is step 1. Step 2 cal surplus step 3. HGH at 5-10 IU daily step 4 anabolic steroids
Since skeleton muscle cells are one of the few cell types that don't divide, there is no real hyperplasia in human skeleton muscles (they mostly just grow thicker). However, new muscle cells can be generated from certain stem cells called satellite cells, but those mainly replace the damaged ones.
Can someone provide link or name of the video of the motor unit recruitment？
Can't find it
Thank you
Díky.
How is this different for those of us with α-Actinin-3 deficiency?
Or in my case …. I don’t I think I have either 😢
What fiber type does my judo where I have to do repeated high intensity, high load and high explosiveness actions for potentially back to back repeated 5 minute bouts?
fast-twitch fibers
How about if I spend 80% of my training working at slow twitch and 20% medium to fast twitch, will the fibres I have be better adapted at both or is there a trade off? Will I lose some of my enduring fibres working on speed or will both simply get stronger?
@@theljbrotherhood3553 Good question. Crossfit has opened my eyes to the potential of the human body. Crossfit has shown the ability to be strong and have great endurance.
According to my DNA test, I am 50/50. Both equally fast and slow twitch. I have a very hard time building large muscles.
I get itching in both.
I can't do anything fast, seems like I'm all slow oxidative fibers lol
Thought they already covered the subject with a previous video
Wow good thing I don’t have any muscle
I needed a good video on this topic since i started working out and can't really find a very informative description of each fibre types...
It's really simple. Slow twitch is for endurance.
Fast twitch is for sprinting.
@@RealMTBAddictyou forgot the strength/bodybuilding aspect of it
@@pandajohn5911I don't see you adding anything to the conversation.
Does it really matter? The consistency is what really matters. It isn't like you can tell your body to produce more fast twitch muscle fibers or slow twitch muscle fibers or hybrid.
@ Bloxian Depending on your goals, strength vs hypertrophy, your training will vary. Generally, strength is best trained with low reps (1-5) but not to failure whereas hypertrophy uses higher reps (5-30) training much closer to failure. Ultimately you have to learn what works best for you.
Some good sources are:
Jeff Nippard
Mike Israetel
Jeff Cavaliere
Ryan Humiston
Dr Milo Wolf.
Lots of tips but consistency and good nutrition would be near the top.
I suspect a psychological element too. Endurance athletes are stoics. Sprinters are drama queens.
Wow never been this early 😂❤.
I try to be fast, but I prefer slow. 🐢
The rabbit, never finishes the race. 🐇
Why do fast twitch seem to atrophy faster than slow twitch as we age later in life?
Would love to get an answer to this!
Fast twitch fibers are more prone to atrophy for everyone by virtue of being larger and fatigueable (and, thus, also more prone to hypertrophy). Any population susceptible to atrophy and sarcopenia will see greater losses to fibers that have more to lose.
As we age, our fast-twitch muscle fibers-responsible for quick, explosive movements-shrink faster than slow-twitch fibers. This happens primarily because the nerves that signal these fast fibers tend to decline, so these muscles get less stimulation and weaken over time. Additionally, fast-twitch fibers aren’t used as much in everyday activities, which rely more on slow-twitch fibers for endurance. Without regular activation, fast-twitch fibers lose size and strength quickly. Finally, since fast-twitch fibers have less blood supply and endurance than slow-twitch fibers, they’re less resilient to aging and atrophy faster.
By Ai
I also read that it’s also partially due to the way human physiology evolved in a world of scarce resources. Fast twitch fibers are the most energy and resource intensive. The body will attempt to maintain the bare minimum. That’s why it’s “use it or lose it.” You’re fitting 100,000’s years of evolution.
*fighting*
💪🏽
❤
can't wait to learn about some quality education! :>
10:10 what is the video he is referring to 🤔
Dunno what are you thinking 😮
@scottessery100 he says there is another video about motor unit requirement, and I could not find it by just searching.
But I DON'T know what YOU are thinking about 😂🤷♂️🤔.
✌️
Does it mean If I train both long distance running and strength training I am missing out, than if I just trained one sport?
You will gain more benefit doing both than you would lose.
The opposite, actually.
Is this why you can't build much muscle mass with isometrics?🤔
you can, what are you talking about. just hang onto something
Heavy resistance training does NOT train the fastest fibres! This information is wrong! 😮
my eye twitches
Magnesium, and pH/electrolytes.
Happens to me when I over train, or drink caffeine.
the random long hair on the preserved cadaver leg is just driving me insane, it's like seeing hair on food, please remove it 😂
Crediting so much to mitochondria . So much of what males are selected for. Plus according to every dogma . 100% of selection is on the male and 80% of development comes from the mother
Great video but you are 100% wrong that you can convert type 1 muscle fibers into fast twitch muscle fibers. Not even close. It will never happen!!!! I am going to make a video debunking what you just said. It's simply absurd. They could go back and forth in their own subtype, but there is no turning a slow fiber into a type 2X. Come on, man!!!!!
In other words, you are claiming you can convert low-threshold motor units into high-threshold motor units. Simply absurd!!!! It's not happening!
The only fibers that can do this are hybrid I/IIa/IIx fibers. And people are born with these. These specific fibers work back and forth in their own subtype. You are not converting a pure slow twitch fiber that does not contain myosin heavy chain isoform composition of a type 2X fiber into a pure fast twitch type 2 X fiber.
16min of yapping
2:36 There are something wrong in the left and middle one.
Why?
@@scottessery100Because type 2a should be in the middle of type 1 and type 2x with the indicators..
@@scottessery100because type I muscle fibres are slow twitch muscle fibres and type IIa muscle fibres are fast twitch muscle fibres
Careful a newscaster got fired for talking about this😅.
Maybe the sperm's mitochondria fuses with the ovum's
Doubt it’s fusion maybe addition to the ovum
@scottessery100 but paternal mitochondrial DNA is rare
This video was definitely scripted from chat gpt
Use AI to create a secondary video of the same video, but the other video doesn’t use real muscle tissue from cadavers. Use a cartoonish version that looks similar. The reason is some of us don’t like what doctors have to do for a living, cause we’re squeamish with it. But we want your information.
Bro the name of the channel is INSTITUTE OF HUMAN ANATOMY, their main appeal is using cadavers to demonstrate how things work
No
No
@@RealMTBAddict you’re entitled to your interpretation, but I’m getting likes on this because other people agree with my interpretation.
@@mryamaho why won’t you advocate for them to use AI to make an identical video with no effort that would appeal to more people?
Another steroid junkie for the thumbnail because those are the REAL men! 😂😂😂😂 WTF. I'm stronger than steroid taking people and I'm regular size, just 20 years of construction work! Don't believe me come work at my job! You'll be going home in 30 minutes.
Good for you
@scottessery100 I know.
Most steroid use is for aesthetics...
Thank you, I really like your videos and it’s really helpful to me 🫶🏻🩵
Why do you guys always use images of guys that are clearly on anabolic steroids? It’s hella misleading 😪
Because the weak beta males that run this channel think that's what a real man looks like. 😂😂😂😂😂😂
Because whoever runs this channel is weak.
Because weak men think that way 😂
Sorry for long answer but unfortunately this is the nature of the beast (social media, TH-cam etc). They have to get views and clicks to be successful and reach a larger audience. I don't agree with it but it goes with the territory.
Unfortunately humans are drawn to the louder more showy types of things and people. You ever notice how people like the big mouth funny guy get more attention even though he is full of crap compared to the more reserved knowledgeable person?
For example, Greg Doucette first did informative videos with a normal voice and got few clicks and it was not until he changed his voice and got more controversial and clickbaity that he blew up and is now a millionaire.
Humans are flawed and we have to adapt accordingly.
Maybe the sperm's mitochondria fuses with the ovum's