Originally Posted by Jay Ashman
Most 100m runs are won in the first 50m. Not many HS athletes have that 5th gear to turn it up like we sometimes see the elites one do. Its all in how fast you are off the blocks and how quickly you accelerate and maintain top speed. Work that hard.
Most people are fading at the end because they neglect working the 50-100m part of the race. So by default, if you win to 50m, you likely win to 100m. However, that's a pretty poor race strategy. Build up the speed endurance that your opponents aren't working because they are focusing on how fast they are off the blocks and how quickly they accelerate, as you just suggested.
The end of the race is at least as important as the beginning. From about 60m on, it's speed-endurance...you are slowing down.
Note, Carl Lewis was rarely the first one out of the blocks. He won by smart race strategy...lengthening his acceleration (rather than trying to get up to top speed as fast as possible) and overtaking them at the end (with superior speed-endurance, aided by not hitting hit top speed till later in the race). Prime example: http://www.youtube.com/watch?v=MVRl8gihrHM
The same could be said of Bolt's race in Beijing...he was the last one out of the blocks, though he's a freak of nature that doesn't conform to many "rules" of sprinting.