NSCA-CPT Biomechanics 5

Question 1

When coaching a client on landing mechanics, which cue BEST reduces ACL injury risk by improving biomechanics?

Accepted Answer

Land with knees flexed, hips flexed, and soft ankles to absorb impact

Answer

Soft landings with hip and knee flexion distribute impact forces over time and across multiple joints, reducing peak loads on the ACL.

Question 2

Which of the following describes the force–velocity relationship in skeletal muscle?

Accepted Answer

As concentric velocity increases, force production decreases

Answer

The force–velocity curve shows an inverse relationship during concentric contractions: faster shortening velocity results in less force due to reduced cross-bridge cycle time.

Question 3

What is the primary axis around which the forearm pronates and supinates?

Accepted Answer

Longitudinal axis through the radius and ulna

Answer

Forearm rotation (pronation/supination) occurs around a longitudinal axis running from the proximal radioulnar joint to the distal radioulnar joint.

Question 4

A personal trainer notices a client's knee collapses medially during a single-leg squat. This valgus collapse is MOST likely linked to weakness in which muscle group?

Accepted Answer

Hip abductors and external rotators

Answer

Weakness in the hip abductors and external rotators allows the femur to adduct and internally rotate, causing knee valgus during single-leg loading.

Question 5

Which variable in the impulse–momentum theorem directly determines the change in linear momentum?

Accepted Answer

The product of force and time (impulse)

Answer

Impulse (F × t) equals the change in momentum (Δmv); applying a larger force or longer time duration produces a greater change in an object's momentum.

NSCA-CPT Exam Practice Test

NSCA-CPT Exam Practice Test

NSCA-CPT Biomechanics 5