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8 Cards in this Set
- Front
- Back
Acceleration
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Rectus femoris, iliopsoas, hamstrings, and anterior tib all contracting concentrically.
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Midswing
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Same as acceleration
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Deceleration
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Anterior tib concentrically to keep ankle in neutral in preparation for heel strike. The knee is extending so the quads are contracting concentrically and the hamstrings eccentrically to keep the knee from snapping into extension.
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Heel strike
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Ant tib concentrically. Quads eccentrically to minimize the amount of knee flexion.
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Foot flat
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Ant tib eccentrically to prevent foot from slapping on floor. The quads and glutes contract eccentrically.
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Midstance
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Plantarflexors contract eccentrically to control the rate at which the leg moves over the ankle. Quads concentrically to extend the knee.
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Heel off
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Plantar flexors concentrically
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Toe off
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Plantar flexors continue to contract concentrically and the hip flexors begin to contract concentrically.
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