During the down position of a standing vertical jump, which muscles act across the ankle joint?

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Multiple Choice

During the down position of a standing vertical jump, which muscles act across the ankle joint?

In the down phase of a standing vertical jump, the body must absorb impact and control the ankle as you descend. The ankle tends to move into dorsiflexion as the tibia moves forward over the foot on landing, and the plantar flexors, which cross the back of the ankle, contract eccentrically to slow this motion and dissipate energy. This braking action protects the joint and helps store elastic energy for the subsequent push-off. Dorsiflexors would actively produce dorsiflexion, which isn’t the primary demand here, so they’re less engaged in this phase. Invertors and evertors mainly influence movement at the subtalar joint and aren’t the primary muscles acting across the ankle during this down/landing phase.

In the down phase of a standing vertical jump, the body must absorb impact and control the ankle as you descend. The ankle tends to move into dorsiflexion as the tibia moves forward over the foot on landing, and the plantar flexors, which cross the back of the ankle, contract eccentrically to slow this motion and dissipate energy. This braking action protects the joint and helps store elastic energy for the subsequent push-off. Dorsiflexors would actively produce dorsiflexion, which isn’t the primary demand here, so they’re less engaged in this phase. Invertors and evertors mainly influence movement at the subtalar joint and aren’t the primary muscles acting across the ankle during this down/landing phase.

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