Thanks for the care you put into this video. My experience agrees. Remarkably, the Nike Zoom Alpha 6 isn’t slower than the Alpha Fly 3 (I’m 60kg, 56yrs old, and running low to mid18mins for 5km these days). The Zoom Alpha 6 is considerably more comfortable too.
Taking the time to execute a designed experiment to get at actual relative differences in running efficiency between shoes is very helpful. I wish there was more of this sort of thing on YT.
Enjoy listening to your testing- I have tried similar tests between meta speed edge Paris and vapor fly and I could not tell much of a difference from the numbers over a 10 min test. I imagine weight has to matter at some point but it may take many miles of testing. Temped to try the zoomfly 6 now though form your results.
These were the hardest two shoes to separate in what are relatively small tests. Usually I get some reasonably clear daylight between one or other shoe...not with these.
Thanks for the video! I ran a marathon two months ago in the AF3 and it really is a great shoe for that distance. I picked up the ZF6 Kipchogie edition a couple days ago but have only walked around the house. Look forward to running in them this weekend.
Great video. So you need less power in AF3 vs ZF6 to generate the same speed. That means your running effectiveness is better in AF3. Running Effectiveness is a Power concept (not to be confused by Running Efficiency or Running Economy or Relative Effort) which is how well you are converting power to speed. It is (speed (m/s) divided by (av.g. power / Stryd weight ) It is easy to calculate, unfortunately it is not available directly from Stryd Power Center or the Stryd app. I think it might be hard to detect small differences in short tests like this. A 20-40 min marathon or HM pace tempo workout might be better test. You can look at RE figures. I calculate running effectiveness from the tempo portions of the long runs.
Tolunay, as you say it is really hard to detect small differences in smaller tests. After the first few testsI was thinking I must be done something wrong, which is why I threw in the Infinity RN4 GTX to see if there was a difference in HR, which there was. Then I did the back to back to back to back test and it was hard to separate them. Finally I did the AF3 ZF6 AF3 test to try and isolate the results in the ZF6 and avoid any influence of fatigue. What I would really like is a giant data set, to get really meaningful data. But for the moment this adds a little data into the mix, which is more than the manufacturers do...
Will do but I must first put more miles on the other shoes in my rotation and I would prefer not to kill them winter running in Ottawa with all the salt, sand etc.
From another old ratlab: running in these supershoes like the Alphafly (or Vaporfly in my case) does make you féél young(er) again, right? Nevermind the raw numbers, after a certain threshold, it doesn't matter what causes the "fly"-part of these shoes, as long as they give you the sensation of being young(er)/fast(er)/strong(er) again... 😅
@@خلونيافكربإسم I have started to see them on discount on some online stores. That will happen more and more now that they have been out awhile. And the Zoom Fly 6 runs them close on performance are much cheaper and will soon get discounted further. Best wishes for 2025.
So glad to see that Nike finally have a very good race training shoe again. A training shoe you can race in if you want to as well. Nike christmas time has come at the right time 🫶
Thank you for this! Great video and really helped me decide on which to get!!
Thanks for the care you put into this video. My experience agrees. Remarkably, the Nike Zoom Alpha 6 isn’t slower than the Alpha Fly 3 (I’m 60kg, 56yrs old, and running low to mid18mins for 5km these days). The Zoom Alpha 6 is considerably more comfortable too.
Great to get the feedback from someone else who has run in both! Best wishes for 2025
Taking the time to execute a designed experiment to get at actual relative differences in running efficiency between shoes is very helpful. I wish there was more of this sort of thing on YT.
So do I, but will keep going with more tests in the meantime. Glad you found it helpful, make making the video worthwhile.
An early morning treat , thank you.
Enjoy listening to your testing- I have tried similar tests between meta speed edge Paris and vapor fly and I could not tell much of a difference from the numbers over a 10 min test. I imagine weight has to matter at some point but it may take many miles of testing. Temped to try the zoomfly 6 now though form your results.
These were the hardest two shoes to separate in what are relatively small tests. Usually I get some reasonably clear daylight between one or other shoe...not with these.
Thanks for the video! I ran a marathon two months ago in the AF3 and it really is a great shoe for that distance. I picked up the ZF6 Kipchogie edition a couple days ago but have only walked around the house. Look forward to running in them this weekend.
Glad you liked the video and really interested in the fact that you also have both. It would be great to hear what you think of them...
Could you share your thoughts now?
@@brandall101 I have three runs in it now. Very comfortable fun training shoe. I wouldn’t pick it for a race over the Alphafly though.
Amazing video 🎉🎉🎉
Wow thank you for your hard work
Great video. So you need less power in AF3 vs ZF6 to generate the same speed. That means your running effectiveness is better in AF3. Running Effectiveness is a Power concept (not to be confused by Running Efficiency or Running Economy or Relative Effort) which is how well you are converting power to speed. It is (speed (m/s) divided by (av.g. power / Stryd weight ) It is easy to calculate, unfortunately it is not available directly from Stryd Power Center or the Stryd app.
I think it might be hard to detect small differences in short tests like this. A 20-40 min marathon or HM pace tempo workout might be better test. You can look at RE figures. I calculate running effectiveness from the tempo portions of the long runs.
Tolunay, as you say it is really hard to detect small differences in smaller tests. After the first few testsI was thinking I must be done something wrong, which is why I threw in the Infinity RN4 GTX to see if there was a difference in HR, which there was. Then I did the back to back to back to back test and it was hard to separate them. Finally I did the AF3 ZF6 AF3 test to try and isolate the results in the ZF6 and avoid any influence of fatigue. What I would really like is a giant data set, to get really meaningful data. But for the moment this adds a little data into the mix, which is more than the manufacturers do...
The difference would show the longer time on feet as you suggested near the end of your video. I look forward to purchasing the ZOOM Fly.
If you do get a pair I would live to hear what you think of them
Will do but I must first put more miles on the other shoes in my rotation and I would prefer not to kill them winter running in Ottawa with all the salt, sand etc.
Great. I have the opposite problem. I have bought my first pair of ice spiked shoes, and it is relatively warm here in Dublin...
Barry, why midnight uploads
Some of us have work tomorrow 😅
Ideal timing for us Southern hemisphers dwellers in AEST 🫶
From another old ratlab: running in these supershoes like the Alphafly (or Vaporfly in my case) does make you féél young(er) again, right? Nevermind the raw numbers, after a certain threshold, it doesn't matter what causes the "fly"-part of these shoes, as long as they give you the sensation of being young(er)/fast(er)/strong(er) again... 😅
I really do love the sensation when I get to speed up and for a few seconds time travel back to my youth...
alpha fly 3 it’s my dream shoes want to buy it, but my budget does not allow😢
@@خلونيافكربإسم I have started to see them on discount on some online stores. That will happen more and more now that they have been out awhile. And the Zoom Fly 6 runs them close on performance are much cheaper and will soon get discounted further. Best wishes for 2025.
@ Also 6 I don't even have a half price
It's sad that at $170 US, the Zoomfly 6 feels like a bargain.
So glad to see that Nike finally have a very good race training shoe again.
A training shoe you can race in if you want to as well.
Nike christmas time has come at the right time 🫶
Great value for a good carbon plate shoe, that is relatively long lasting....and will get discounted...
@@OldManRunner kudos to Nike for getting it done, finally. They really need a replacement for Tempo Next.
@@bartekzielinski1645 Yes. This is the shoe I was hoping the Pegasus Plus was going to be...
@OldManRunner hear hear,
i totally agree, Barry