All Runners (n=19)		Ultra-Runners (n=8)		Recreational Runners (n=11)
	Pre	Post	Pre	Post	Pre	Post
Normalized distance from heel to center of mass line*	7.36 (2.09)	7.00 (2.07)	6.67 (1.64)	6.01 (1.26)	7.85 (2.31)	7.72 (2.28)
Normalized total vertical excursion*	.036 (.007)	.038 (.007)	.0373 (.005)	.0395 (.007)	.0358 (.009)	.037 (.008)