CSCS Resistance Training Biomechanics 4

Question 1

Increasing the weight on a barbell while maintaining the same bar velocity will increase which mechanical variable?

Accepted Answer

Power output

Answer

Power equals force multiplied by velocity; increasing force (via heavier load) at the same velocity increases power output.

Question 2

Which of the following best explains why wider grip widths in the bench press shift emphasis toward the pectoralis major over the triceps?

Accepted Answer

A wider grip reduces the moment arm at the elbow, decreasing triceps contribution

Answer

A wider grip shortens the horizontal distance the bar travels and reduces the elbow flexion angle, thereby decreasing the moment arm at the elbow and lessening the demand on the triceps.

Question 3

What does the stretch-shortening cycle (SSC) primarily enhance in resistance and plyometric training?

Accepted Answer

Concentric power output by utilizing stored elastic energy and neural potentiation

Answer

The SSC couples an eccentric pre-stretch with a rapid concentric contraction, using stored elastic energy in tendons and reflexive potentiation to augment concentric power.

Question 4

Which term describes the product of a force and the perpendicular distance from the axis of rotation?

Accepted Answer

Torque

Answer

Torque (moment of force) is calculated as force multiplied by the perpendicular moment arm distance from the axis of rotation.

Question 5

During a conventional deadlift, excessive forward lean of the trunk primarily increases the demand on which muscle group?

Accepted Answer

Spinal erectors (erector spinae)

Answer

A more forward trunk lean increases the moment arm of the load relative to the lumbar spine, requiring the erector spinae to produce greater extensor torque.

(CSCS) Certified Strength & Conditioning Specialist Practice Test

(CSCS) Certified Strength & Conditioning Specialist Practice Test

CSCS Resistance Training Biomechanics 4