Deck 2: Common Measurements in Exercise Physiology

Question 1

A kilocalorie is equal to

A) 100 calories.
B) 1,000 calories.
C) 4,186 kilojoules.
D) 4.186 joules.

Answer 1

B

Question 2

Recent evidence suggests that the optimum speed of movement

A) increases as the power output increases.
B) decreases as the power output increases.
C) remains constant as the power output increases.
D) increases as the power output decreases.

Answer 2

A

Question 3

The SI units used to describe power are

A) Newtons.
B) joules.
C) watts.
D) joules per second.

Answer 3

C

Question 4

Calculating the work performed on a cycle ergometer requires that you know all of the following except

A) subject's body weight.
B) resistance against flywheel.
C) pedaling speed.
D) exercise time.

Question 5

A MET is defined as a metabolic equivalent and is equal to

A) resting VO₂.
B) 50% of resting VO₂.
C) 200% of resting VO₂.
D) VO₂ max.

Question 6

Calculate the power if 600 joules of work are completed in 60 seconds.

A) 10 watts
B) 660 watts
C) 36,000 watts
D) Power cannot be calculated with the information provided.

Question 7

A subject performing a 10-MET activity would have an oxygen consumption of approximately

A) 10 ml.kg^-1.min^-1.
B) 25 ml.kg^-1.min^-1.
C) 35 ml.kg^-1.min^-1.
D) 45 ml.kg^-1.min^-1.

Question 8

The energy cost of horizontal running can be estimated reasonably accurately because

A) the VO₂ of running is always the same.
B) the VO₂ of horizontal running is always 1 MET.
C) the VO₂ increases linearly with running speed.
D) none of the above.

Question 9

The SI unit for work is the

A) joule.
B) watt.
C) kpm.
D) kcal.

Question 10

The SI unit used for both work and energy is the joule.

Question 11

Work equals power divided by time.

Question 12

Power is defined as

A) the ability to perform work.
B) work divided by time.
C) work times force.
D) force times distance.

Question 13

One MET equals resting oxygen consumption, which is approximately 5.3 ml.kg^-1.min^-1.

Question 14

Net efficiency is defined as

A) work output/energy expended at rest times 100.
B) work performed/energy expended above rest times 100.
C) work output/energy expended times 100.
D) energy expended/work output times 100.

Question 15

Direct calorimetry is a means of determining energy expenditure and involves the measurement of

A) oxygen consumption.
B) heat production.
C) ATP hydrolysis.
D) carbon dioxide production.

Question 16

Work is defined as

A) the ability to transform energy from one state to another.
B) the ability to utilize oxygen.
C) force times distance.
D) distance times power output.

Question 17

Exercise efficiency is greater in subjects who

A) have a higher percentage of fast muscle fibers.
B) have a higher percentage of slow muscle fibers.
C) have 50% fast fibers and 50% slow fibers.

Question 18

A runner who exhibits poor running economy would require

A) a lower VO₂ at any given running speed compared to an economical runner.
B) a higher VO₂ at any given running speed compared to an economical runner.
C) the same VO₂ at any given running speed compared to an economical runner.

Question 19

Net efficiency ______________ as work rate increases.

A) increases
B) does not change
C) decreases

Question 20

The most common technique used to measure oxygen consumption in exercise physiology laboratories is

A) closed-circuit spirometry.
B) open-circuit spirometry.
C) direct calorimetry.
D) computer calorimetry.