CFP Exercise Science & Physiology 3

Question 1

Which hormone is most responsible for mobilizing free fatty acids from adipose tissue during prolonged low-intensity exercise?

Accepted Answer

Epinephrine

Answer

Epinephrine (adrenaline) activates hormone-sensitive lipase in adipocytes, releasing free fatty acids for use as fuel during prolonged aerobic exercise.

Question 2

The sliding filament theory of muscle contraction states that:

Accepted Answer

Actin slides over myosin, shortening the sarcomere without filaments changing length

Answer

During contraction, myosin heads pull actin filaments toward the center of the sarcomere, shortening it without the filaments themselves changing length.

Question 3

A client performs 3 sets of 12 reps at 70% 1RM. This protocol primarily targets which training adaptation?

Accepted Answer

Muscular hypertrophy

Answer

Moderate loads (67–85% 1RM) with moderate rep ranges (8–12) and multiple sets are the classic stimulus for skeletal muscle hypertrophy.

Question 4

What is the PRIMARY role of calcium (Ca²⁺) in skeletal muscle contraction?

Accepted Answer

Binds troponin to expose actin binding sites for myosin

Answer

Released from the sarcoplasmic reticulum, Ca²⁺ binds to troponin C, causing tropomyosin to shift and expose actin's myosin-binding sites.

Question 5

Which physiological variable is MOST closely correlated with endurance performance in well-trained athletes?

Accepted Answer

Lactate threshold as a % of VO₂max

Answer

Among athletes with similar VO₂max values, the lactate threshold as a percentage of VO₂max best discriminates endurance performance.

(CFP) Certified Fitness Professional Practice Test

(CFP) Certified Fitness Professional Practice Test

CFP Exercise Science & Physiology 3