NSCA CSCS Exercise Science Principles 4

Question 1

Phosphocreatine (PCr) stored in muscle provides energy primarily through which reaction?

Accepted Answer

PCr + ADP → Cr + ATP (catalyzed by creatine kinase)

Answer

Creatine kinase rapidly transfers a phosphate group from phosphocreatine to ADP, regenerating ATP without requiring oxygen.

Question 2

Which adaptation explains the increased strength seen in the first 4–8 weeks of resistance training in previously untrained individuals?

Accepted Answer

Neural adaptations including improved motor unit recruitment and synchronization

Answer

Early strength gains in novice trainees are primarily neurological — improved motor unit recruitment, rate coding, and intermuscular coordination — before substantial hypertrophy occurs.

Question 3

Wolff's Law states that:

Accepted Answer

Bone remodels according to the mechanical stresses applied to it

Answer

Wolff's Law holds that bone is a dynamic tissue that deposits matrix along lines of mechanical stress and resorbs bone where stress is absent.

Question 4

During maximal exercise, which factor is the primary determinant of VO2max?

Accepted Answer

Maximal cardiac output (central limitation)

Answer

In healthy individuals, VO2max is primarily limited by the cardiovascular system's capacity to deliver oxygen (maximal cardiac output), not by the muscles' ability to consume it.

Question 5

The term 'muscle pennation angle' refers to:

Accepted Answer

The angle at which muscle fibers insert relative to the line of pull of the muscle

Answer

Pennation angle is the angle between muscle fiber orientation and the muscle's longitudinal axis (line of pull), which affects force transmission and muscle architecture.

NSCA CSCS - NSCA Certified Strength and Conditioning Specialist Practice Test

NSCA CSCS - NSCA Certified Strength and Conditioning Specialist Practice Test

NSCA CSCS Exercise Science Principles 4