FREE NSCA-CPT Biomechanics Questions and Answers

Question 1

increase force potential and strength while limiting velocity

Accepted Answer

Greater pennation angle=

Answer

A greater pennation angle in a muscle means its fibers are oriented more obliquely to the muscle's line of pull. This arrangement allows more muscle fibers to be packed in parallel, increasing the physiological cross-sectional area and thus enhancing force potential and strength. However, this often comes at the expense of reducing the muscle's effective shortening velocity.

Question 2

Contracts against the pull of contracting statically

Accepted Answer

Stabilizer

Answer

A stabilizer muscle contracts statically (isometrically) to hold a body segment in a fixed position, providing a stable base for other muscles to perform movement. It actively contracts against the pull of other muscles or external forces to prevent unwanted motion. This allows for efficient and controlled execution of dynamic actions.

Question 3

The inclination of a force to rotate an object about a given fulcrum.

Accepted Answer

Torque

Answer

Torque is the rotational equivalent of force, representing the tendency of a force to rotate an object about a given fulcrum or axis. It is calculated as the product of the applied force and the perpendicular distance from the fulcrum to the line of action of that force, known as the moment arm.

Question 4

optimal number of crossing bridges exist

Accepted Answer

Length-Tension relationship

Answer

The length-tension relationship describes how the force a muscle can generate is dependent on its initial length. Optimal force production occurs when the muscle is at an intermediate length, allowing for the greatest number of myosin cross-bridges to optimally interact with actin binding sites. If the muscle is too short or too long, fewer cross-bridges can form, reducing its force output.

Question 5

The rate of rotation of an object

Accepted Answer

Angular Velocity

Answer

Angular velocity is a measure of the rate at which an object rotates or revolves around an axis. It quantifies how quickly an angle changes over time. This concept is crucial in biomechanics for understanding the speed of joint movements and the rotation of body segments.

NSCA-CPT Exam Practice Test

NSCA-CPT Exam Practice Test

FREE NSCA-CPT Biomechanics Questions and Answers