Which movement will lengthen the fibers of the gastrocnemius?

Which movement will lengthen the fibers of the gastrocnemius?

• A. Dorsiflexion
• B. Plantar Flexion
• C. Inversion
• D. Eversion

Answer: (A)

Dorsiflexion of the ankle lengthens the gastrocnemius because this muscle crosses the ankle joint and runs down the back of the leg. When you bring the top of the foot toward the shin, the calf fibers are stretched, increasing their length (ideally with the knee straight to maximize the stretch). Plantarflexion, the opposite movement, tends to shorten the gastrocnemius. Inversion and eversion move the foot side to side at the subtalar joint and don’t produce a significant stretch of this two-joint muscle. For the best stretch, keep the knee extended while dorsiflexing the ankle, since bending the knee reduces the pull on the gastrocnemius.

Dorsiflexion of the ankle lengthens the gastrocnemius because this muscle crosses the ankle joint and runs down the back of the leg. When you bring the top of the foot toward the shin, the calf fibers are stretched, increasing their length (ideally with the knee straight to maximize the stretch). Plantarflexion, the opposite movement, tends to shorten the gastrocnemius. Inversion and eversion move the foot side to side at the subtalar joint and don’t produce a significant stretch of this two-joint muscle. For the best stretch, keep the knee extended while dorsiflexing the ankle, since bending the knee reduces the pull on the gastrocnemius.