Are you moving your legs fast or moving your body fast????.....

[Flash]

@izzle1989

true because when i think lift knees i pop up 2 early and when i think push hard my hips drop and in full stride i pull a hammy from overstriding so the best cue for me is to move the cm not the legs

This might prove helpful in case you missed it:

http://www.charliefrancis.com/community/showthread.php?t=21809