Table 1.

Average (± standard deviation) probability density function kurtosis and skewness of raw EMG signals and muscle activation patterns from 10 muscles for 19 participants during walking and running at different speeds (10 trials each).

	Walk		Slow run		Moderate run		Fast run
	Raw EMG	Muscle activation patterns	Raw EMG	Muscle activation patterns	Raw EMG	Muscle activation patterns	Raw EMG	Muscle activation patterns
Kurtosis	1.75(±0.19)	1.72(±0.20)	1.45(±0.21)	1.42(±0.20)	1.29(±0.19)	1.25(±0.18)	1.1(±0.2)	1.0(±0.10)
Skewness	0.01(±0.02)	0.012(±0.02)	0.009(±0.02)	0.012(±0.01)	0.005(±0.01)	0.01(±0.01)	0.003(±0.01)	0.009(±0.01)

FA: factor analysis; ICA: independent component analysis; NMF: non-negative matrix factorisation; PCA: principal component analysis.