Abstract
Abstract Five subjects performed isometric trunk extension and flexion exercises in standing and kneeling postures at three angles of trunk flexion. Peak torque and electromyography (EMG) of ten trunk muscles were collected during these tests. Results indicated a 16% lower strength capacity in the kneeling posture; however, trunk muscle activity was similar in both postures. The altered biomechanics of the lower limbs in the kneeling posture may be responsible for the reduced strength capacity observed.
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