CSCS: Biomechanics of Resistance Flashcards

Which plane of motion is primarily involved in a lateral raise exercise?

Answer: Frontal (coronal) plane

The lateral raise moves the arm away from the body's midline in the frontal (coronal) plane through glenohumeral abduction.

When calculating net joint torque during a squat, which of the following is NOT a required input?

Answer: Muscle fiber type percentage

Net joint torque analysis requires kinetic (force) and kinematic (position) data; muscle fiber type is a histological characteristic not needed for torque calculations.

The center of pressure (COP) during a deadlift should ideally remain over which region of the foot?

Answer: Mid-foot to slightly anterior heel

A mid-foot COP position during the deadlift promotes balance and efficient force transfer through the kinetic chain from floor to barbell.

Which muscle action occurs when a muscle exerts force while its length remains constant?

Answer: Isometric

An isometric muscle action produces force with no change in muscle length and therefore no joint movement.

An athlete performs a plyometric depth jump. During the amortization phase, the primary biomechanical goal is to:

Answer: Rapidly transition from eccentric to concentric action

The amortization phase (ground contact) must be brief so that stored elastic energy is not dissipated as heat before the concentric propulsion phase begins.

Which axis of rotation is associated with internal and external rotation of the hip?

Answer: Longitudinal (vertical) axis

Internal and external rotation of the hip occurs around the longitudinal (vertical) axis that runs along the length of the femur.

A heavier athlete and a lighter athlete climb the same flight of stairs in the same time. Which statement about power is correct?

Answer: The heavier athlete produces more power

Power equals work divided by time; the heavier athlete does more work (greater force × same displacement) in the same time, yielding higher power output.