Table 1.

The step-to-step percent coefficient of variation (CV) of stance, swing and cadence is reported as the ratio between mean and standard deviation.

Locomotion type	Environment	Stance CV	Swing CV	Cadence CV	Strike index
Walking	Overground	3.8 ± 3.5%	4.4 ± 4.2%	2.1 ± 2.1%	0.063 ± 0.030
	Treadmill	2.5 ± 1.8%	4.0 ± 3.0%	1.2 ± 0.4%	0.047 ± 0.018
Running	Overground	7.4 ± 3.4%	4.3 ± 1.7%	2.6 ± 1.4%	0.066 ± 0.029
	Treadmill	7.1 ± 15.9%	4.5 ± 8.6%	1.9 ± 2.3%	0.073 ± 0.051

The strike index is the distance of the center of pressure at touchdown from the most posterior part of the heel, normalized to foot length.