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Fig. 5. Work loops of hip torque vs angle for a typical subject: (A) as a
function of frequency; and (B) compared with normal walking. (A) Work loops
varied mostly in terms of torque rather than amplitude or contained area. (B)
Compared with normal walking at 1.3 m s-1 (data from
Whittle, 1996), isolated leg
swinging occurred at a comparable range of torques and angles, although
walking occurs at a lower stride frequency of 0.9 Hz and with more work at the
hip.
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