The other thread shows it. But I think running and jumping got more to do than just with fast twitch muscle fibres.
Jumping and running both depend on the elasticity of the tendons and the power which can be produced by the muscles. Someone with a lot of bounce and a large difference between running and standing vert, like early career MJ, would have very elastic tendons, while someone with little difference would be someone who relies mainly on muscular strength, like olympic lifter Pyrros Dimas, who's not a jumper but has an impressive vert.
Concentric strength is most important at the beginning of the 100m, but the middle and end rely more on tendon elasticity. (how someone like carl lewis, who was comparatively weak and didn't lift weights can still be fast).
This is purely anecdotal but I think Asians got better fast twitch muscles than white people but white people got better elasticity of the tendons. Look at Olympic lifters. To be a great Olympic lifter you need to have a lot of fast twitch muscle and Asians dominate at lifting in anything under heavyweight. Same as when you watch sprints the Asian sprinters always get out the blocks really fast and have awesome 60m times but kind of fade out in 100m and especially in the 200m. In the 200m there's been about 40 people who have gone sub 20, in which 5 of them have been white and 0 Asian. In the 100m there's been about 90 who have gone sub 10 with only 1 of them white and 0 Asian. But if you look at the amount of Asians that have gone sub 10.1 to the amount of whites it's pretty even and maybe there's even been more Asians under 10.1 than whites. There could be other factors to that as well like Asians being shorter, which would give them an advantage in the first part of the race coz it's easier to accelerate when you're shorter or if you got shorter limbs it's easier to lift heavier weights because you've got less ROM. Either way I think Asians got pretty good fast twitch muscles but they don't have very good elasticity. Look at Asian calves. They're huge. Look at black calves their small. Yet black people got the best elasticity because small calves usually = speed. White people kind of fall in the middle.
So yeh just a broscience/anecdotal theory but it's something to think about.
Edit- anecdotal evidence- I got 2 guys that I know called Derek and Wallace. Derek is Asian and Wallace is white.
Derek (Asian) PBs-
60m- 6.78
100m- 10.84
200m- 22.05
Wallace (White) PBs-
60m- 7.05
100m- 10.89
200m- 21.49
But once again height comes into it coz Derek is 5'8 while Wallace is 6'2
Either way it's food for thought.
