Instant Notes in Sport and Exercise Physiology

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What is the relationship between work rate and oxygen cost (VO2) during moderate exercise?

The oxygen cost decreases linearly as work rate increases

The oxygen cost increases exponentially as work rate increases

The oxygen cost increases linearly as work rate increases (correct)

The oxygen cost remains constant regardless of work rate

What is the primary determinant of the oxygen cost (VO2) of performing work?

The ambient temperature

The amount of muscle mass involved

The work rate (correct)

The efficiency of the cardiovascular system

How is the heat produced during metabolism typically measured?

By measuring the change in body temperature

By measuring the amount of sweat produced

Using direct calorimetry in a whole body chamber (correct)

Using indirect calorimetry in a laboratory setting

What is the relationship between exercise intensity and the lactate threshold?

Moderate exercise is below the lactate threshold, while heavy exercise is above it (D) Signup and view all the answers

What is the definition of a 'supramaximal' work rate?

A work rate above that associated with maximal oxygen uptake (B) Signup and view all the answers

What is the relationship between energy expenditure and heat production during exercise?

Energy expenditure is directly proportional to heat production (D) Signup and view all the answers

What is the primary role of cyclic adenosine monophosphate (cAMP) in the body?

It acts as a secondary messenger in various cellular processes. (C) Signup and view all the answers

Which of the following is true about coronary heart disease (CHD)?

In CHD, there is a reduced blood flow to the heart muscle. (D) Signup and view all the answers

What is the main application of dual-energy X-ray absorptiometry (DEXA) in exercise physiology?

Measuring bone density and body composition. (B) Signup and view all the answers

Which of the following is a common characteristic of delayed-onset muscle soreness (DOMS)?

DOMS involves muscle pain and stiffness 24-72 hours post-exercise. (C) Signup and view all the answers

What does Resting Metabolic Rate (RMR) represent?

The amount of energy expended at rest for basic physiological functions. (A) Signup and view all the answers

What is the primary function of cyclic adenosine monophosphate (cAMP) in the context of exercise physiology?

It regulates the breakdown of glycogen in skeletal muscles during exercise. (D) Signup and view all the answers

Which of the following is a major risk factor for the development of coronary heart disease?

Elevated levels of low-density lipoprotein (LDL) cholesterol. (D) Signup and view all the answers

Which technique is commonly used to assess body composition and bone mineral density in exercise physiology research?

Dual-energy X-ray absorptiometry (DXA) (B) Signup and view all the answers

What is the primary cause of delayed-onset muscle soreness (DOMS) experienced after intense or unaccustomed exercise?

Microscopic tears in the muscle fibers (D) Signup and view all the answers

What is the primary determinant of an individual's resting metabolic rate (RMR)?

Body composition (B) Signup and view all the answers

In the context of exercise physiology, what does the term "VO2max" refer to?

The maximum amount of oxygen that can be utilized by the body during exercise. (A) Signup and view all the answers

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