I have to disagree. The block clearance is to do more with the concentric power of the muscles.
After just a few strides, the eccentric tension in muscles (governed mainly by velocity x lever length) and the SSC efficiency of the tendons (hip hieght especially), the posture of the spine (spinal awareness more so than back strength), the ability for the muscles to relax quickly and save energy, and other things, are are important than how much concentric tension you can generate to overcome inertia.
Your allmost saying that if some one can record a high vertical jump or broad jump, then they would also be a fast sprinter.
A shot putter holds the record for the longest standing long jump (broad jump.) Same shot putter could hang with sprinters in the first 10m of a race. Middleweight weightlifters of medal standard, would beat the short Tyson Gay out of the blocks (with block practice.)
Allen Iverson’s first step on basketball court was probably every bit as fast as an olympic sprinters first step from a standing position.
Many Running Backs in the N.F.L could hang with sprinters of same leg length for the first 30meters.
Marcus Adam also told me that he and John Regis (bob sled & 200m), could not beat the N.F.L players to the 30m line on the training track in Florida. The football players were not shorter in hieght or leg length.
Anyway… where are all these fast starters, come the finish line in a 100m race?
Yes, many people have tried the ol’ clippers on bike pedals to involve hamstrings (pull-up) and hip flexors (pull-up) on the pedal revolution.
Don’t tell me you brought one of those special training bikes where each pedal turns independantly of the other, so that you have involve hamstrings and hip flexors more to get full revolution.
It’s still no where near the muscle lengths and tendon elasticity (and other things) that are needed AFTER block clearance in a sprint.