Table 1.

Muscle loadings for the three M-modes.

	M1	M2	M3
Explained Variance (%)	37.7 ± 5.9	24.4 ± 5.3	12.6 ± 5.7
TA	−0.38 ± 0.13	0.56 ± 0.09	−0.09 ± 0.06
SOL	0.74 ± 0.08	−0.25 ± 0.07	0.18 ± 0.11
GM	0.80 ± 0.03	−0.34 ± 0.04	0.13 ± 0.06
GL	0.80 ± 0.04	−0.27 ± 0.02	0.13 ± 0.08
BF	0.72 ± 0.11	−0.06 ± 0.12	0.14 ± 0.06
ST	0.86 ± 0.01	−0.20 ± 0.03	0.14 ± 0.06
RF	−0.27 ± 0.05	0.77 ± 0.03	0.00 ± 0.04
VL	−0.29 ± 0.05	0.81 ± 0.02	0.01 ± 0.04
VM	−0.19 ± 0.05	0.83 ± 0.02	−0.01 ± 0.02
TFL	0.08 ± 0.13	0.49 ± 0.14	0.06 ± 0.10
ESL	0.62 ± 0.09	−0.20 ± 0.06	0.30 ± 0.10
EST	0.54 ± 0.10	−0.18 ± 0.06	0.35 ± 0.12
RA	0.06 ± 0.05	0.12 ± 0.08	0.70 ± 0.14

Averaged across subjects values are presented ± standard error. TA: tibialis anterior; SOL: soleus; GM: gastrocnemius medialis; GL: gastrocnemius lateralis; BF: biceps femoris; ST: semitendinosus; RF: rectus femoris; VL: vastus lateralis; VM: vastus medialis; TFL: tensor fasciae latae; ESL: lumbar erector spinae; EST: thoracic erector spinae; RA: rectus abdominis. Significant loading factors are shown in bold and highlighted.