[quote author="utfootball4" date="1162095727"]
heres a comment made by danimal9 "As long and rapid an acceleration as possible."
This is true in an ideal world but in reality it doesn't (can't) quite work that way because top end speed is finite so rapid acceleration and duration of acceleration can't both be maximized at the same time.
Mike is exactly right. However, I think my comment should be thought of optimizing acceleration, ie find the right amount of rate of change in velocity and the duration of time that occurs till that rate of change in velocity stops. Top end speed is finite, but the finite determinants of top end speed are dependent on both the length and the rate of change in acceleration. The length a maximal acceleration can occur seems to be in the range of 4-7s, although research seems to be showning that males can accelerate for 4.5-6s range and females 5-7s so there does seem to be some physiological mechanisms that differentiate males from females in acceleration durations.
My thoughts are this, you cannot do both as Mike says, but you can work towards optimal acceleration patterns for races by working from the rate of change perspective first and trying to lengthening it to a maximal distance/duration as distance and duration are invariably linked to a specific rate of change pattern. You work a pure acceleration phase, focusing on block clearance, and establishing stride pattern optimizations thru submaximal stride rates and longer contact times to establish greater force application maximum distances worked are 15-25m. Then you start working at distances from 30-60m with emphasis on transistioning to maximal velocity and maximal velocity work as well. However, there are times when the technical aspects of block clearance and the first 3-5 steps out of the block need to be revisited during this time to ensure the motor pattern has been learned. This period often includes 30-60m sprints and extending ins and outs markers, and increased number of flys while the former period has fewer fly's and IO's are done over 10-20-10 or 10-10-10 working on the technical aspects of ins and outs.