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Table 2.

Vastus muscle timing, strain and strain rate during the four phases of muscle activity

PhaseEnd of phase (% of stance)Joint motionStrain (% of fascicle length)Strain rate (muscle lengths s−1)
18±0.3 Flexion −10.0±0.3 −2.170±0.084 
36±1.0* Extension −3.0±0.6* −0.850±0.158* 
61±1.4* Flexion −2.0±0.1 −0.300±0.022 
84±0.7 Extension −3.1±0.4* −0.556±0.091* 
EMG 59±1.0 
PhaseEnd of phase (% of stance)Joint motionStrain (% of fascicle length)Strain rate (muscle lengths s−1)
18±0.3 Flexion −10.0±0.3 −2.170±0.084 
36±1.0* Extension −3.0±0.6* −0.850±0.158* 
61±1.4* Flexion −2.0±0.1 −0.300±0.022 
84±0.7 Extension −3.1±0.4* −0.556±0.091* 
EMG 59±1.0 

Values are means ± s.e.m. averaged over all nine speeds; N=4.

*

Changed with speed.

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