Free CSN Sports & Exercise Physiology Questions and Answers

Question 1

Which energy system is primarily used during a 100-meter sprint?

Accepted Answer

ATP-PC system

Answer

The ATP-PC (Adenosine Triphosphate-Phosphocreatine) system is the primary energy system used during very short, high-intensity activities like a 100-meter sprint. This system provides immediate energy without oxygen, but its stores are limited, lasting only about 6-10 seconds.

Question 2

What is VO2 max a measure of?

Accepted Answer

Maximum oxygen uptake

Answer

VO2 max, or maximal oxygen uptake, is a measure of the maximum amount of oxygen an individual can utilize during intense or maximal exercise. It is a widely accepted indicator of cardiorespiratory fitness and aerobic endurance capacity, reflecting the body's ability to deliver and use oxygen for energy production.

Question 3

Which muscle fiber type is most resistant to fatigue?

Accepted Answer

Type I

Answer

Type I muscle fibers, also known as slow-twitch fibers, are highly resistant to fatigue. They are rich in mitochondria and myoglobin, making them efficient at using oxygen for sustained, low-intensity activities like long-distance running. In contrast, Type II (fast-twitch) fibers are powerful but fatigue quickly.

Question 4

What does the term 'hypertrophy' refer to in exercise science?

Accepted Answer

Increase in muscle size

Answer

Hypertrophy refers to the increase in the size of muscle cells, leading to an overall increase in muscle mass. This physiological adaptation occurs in response to resistance training, where muscle fibers are stimulated to grow larger and stronger. It's a key goal for individuals aiming to build strength and improve body composition.

Question 5

Which organ plays a major role in regulating body temperature during exercise?

Accepted Answer

Skin

Answer

The skin plays a critical role in regulating body temperature during exercise, primarily through the process of sweating. As the body heats up, sweat glands release moisture onto the skin's surface, which then evaporates and cools the body. Additionally, blood vessels in the skin dilate to allow more blood flow to the surface, facilitating heat dissipation.

CSN - Certified Sports Nutritionist Practice Test

CSN - Certified Sports Nutritionist Practice Test

Free CSN Sports & Exercise Physiology Questions and Answers