All of which points to the reasons behind Usain Bolt 's success .
Usain Bolt uses longer strides and during a 100m race Usain Bolt 's feet remain on the ground less Usain Bolt 's his rivals .
All of which points to the reasons behind Usain Bolt 's success , because he uses longer strides and during a 100m race his feet remain on the ground less than his rivals .