some interesting discussion on Bolt…
Usain Bolt 10 meter splits, Fastest Top Speed, 2008 vs 2009
http://speedendurance.com/2009/08/19/usain-bolt-10-meter-splits-fastest-top-speed-2008-vs-2009/
100 meter 20 meter splits and Fastest Top Speed
http://speedendurance.com/2009/08/17/usain-bolt-splits-969-vs-958-can-he-run-faster/
Usain Bolt 200 meter splits, Speed Reserve and Speed Endurance
http://speedendurance.com/2009/08/21/usain-bolt-200-meter-splits-speed-reserve-and-speed-endurance/
400 meter splits - 2009 Berlin World Championships
http://speedendurance.com/2009/08/31/400-meter-splits-2009-berlin-world-championships/