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Length and force of the gastrocnemius and soleus during gait following tendo Achilles lengthenings in children with equinus.

, , , and . Gait Posture, 15 (2): 130--135 (April 2002)

Abstract

Nine subjects (12 sides) with cerebral palsy who walked in equnius were evaluated prior to and 1 year after surgical tendo Achilles lengthening. Gastrocnemius and soleus length Gait Posture, 6 (1997) 9 and plantarflexor force Gait Posture, 6 (1997) 9; J Biomech, 23 (1990) 495 were calculated. The length of the gastrocnemius and soleus increased significantly (P<0.01) following the intervention. Force output of the triceps surae during push-off increased significantly (13.95 N/kg body weight (BW) preop to 30.31 N/kg BW postop; P<0.01). Assessment of the force-length capacity of the triceps surae in candidates for tendo Achilles lengthenings may identify individuals at risk of residual weakness and iatrogenic crouch.

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