SCS Exercise Physiology & Biomechanics 3

Question 1

Phosphocreatine (PCr) resynthesis after a maximal sprint is APPROXIMATELY how complete after 3–5 minutes of rest?

Accepted Answer

95–100%

Answer

PCr stores are nearly fully replenished (95–100%) within 3–5 minutes of rest, which guides sport-specific recovery intervals.

Question 2

The oxygen dissociation curve shifts to the RIGHT in response to which condition?

Accepted Answer

Increased partial pressure of CO2

Answer

Increased CO2 (Bohr effect), decreased pH, or elevated temperature shift the curve right, reducing hemoglobin's oxygen affinity and promoting O2 release to working muscles.

Question 3

Ground reaction force (GRF) during running is typically what multiple of body weight at foot strike?

Accepted Answer

1.5–3.0x

Answer

Running produces vertical GRFs of approximately 1.5–3.0 times body weight, varying with speed, footwear, and surface stiffness.

Question 4

Which hormonal response to acute intense exercise PRIMARILY drives glucose mobilization from the liver?

Accepted Answer

Glucagon and catecholamines

Answer

Glucagon and catecholamines (epinephrine/norepinephrine) stimulate hepatic glycogenolysis and gluconeogenesis to raise blood glucose during intense exercise.

Question 5

In biomechanics, the moment of inertia of a rotating segment INCREASES when mass is:

Accepted Answer

Moved farther from the axis of rotation

Answer

Moment of inertia (I = mr²) increases with the square of the distance from the axis, so distributing mass farther out resists angular acceleration more.

(SCS) Sports Conditioning Specialist Certification Practice Test

(SCS) Sports Conditioning Specialist Certification Practice Test

SCS Exercise Physiology & Biomechanics 3