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8 Cards in this Set

  • Front
  • Back
Acceleration
Rectus femoris, iliopsoas, hamstrings, and anterior tib all contracting concentrically.
Midswing
Same as acceleration
Deceleration
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.
Heel strike
Ant tib concentrically. Quads eccentrically to minimize the amount of knee flexion.
Foot flat
Ant tib eccentrically to prevent foot from slapping on floor. The quads and glutes contract eccentrically.
Midstance
Plantarflexors contract eccentrically to control the rate at which the leg moves over the ankle. Quads concentrically to extend the knee.
Heel off
Plantar flexors concentrically
Toe off
Plantar flexors continue to contract concentrically and the hip flexors begin to contract concentrically.