Exercise Physiology: Test 2

Question 0

RQ for burning carbohydrates

Answer 0

1.00

Question 1

When is fat burned during RQ?

Answer 1

16CO2 / 23O2= .7

When you’re untrained and under lactate threshold

When you need more oxygen than you the carbon dioxide you are using

Question 2

RQ for burning fats

Answer 2

.7

Question 3

RQ for burning proteins

Answer 3

.82

Question 4

What happens to RQ during maximal exercise? Why?

Answer 4

Exceeds 1.0 during heavy exercise due to buffering of lactic acid which produces CO2

Question 5

What are some anaerobic tests and the energy systems they are in?

Answer 5

Jumping power test, sprint running or cycling, rowing, skiing, stair climbing - ATP/PC
Cycle ergometer test, weight lifting- repetitive, (Max work for up to 3 min)- glycolysis

All out sprints from 200-800m

Question 6

Direct calorimetry- what does it asses?

Answer 6

Assesses human energy metabolism, by measuring heat production.

Question 7

Indirect calorimetry- how is it measured

Answer 7

By measuring a persons oxygen uptake, researchers can obtain an indirect, yet accurate, estimate of energy expenditure

Question 8

Two types of indirect calorimetry

Answer 8

Closed circuit

Open circuit spirometry

Question 9

Closed circuit spirometry- how does it work

Answer 9

Subject breathes 100% oxygen from a prefilled container with no outside air coming in.
A drum attached to the spirometer records the dif. Between the initial and final volume of oxygen.

Question 10

When is closed circuit spirometry used and not used

Answer 10

Used- hospitals and research laboratories

Not used- during exercise when subject movement occurs with large volumes of air exchange

Question 11

Open circuit spirometry- how it works

Answer 11

Subject inhales air that has a composition of 20.93% oxygen, .03% carbon dioxide, and 79.04% nitrogen.
Analysis of two factors measures oxygen uptake:
Volume of air breathed during specified time period
Composition of exhaled air

Question 12

Three types of open circuit spirometry used

Answer 12

Bag technique
Portable spirometry
Computerized instrumentation

Question 13

What is the relationship between VO2 Max and heart rate?

Answer 13

Attainment of Max heart rate indicates subject is close to Max intensity (vo2 peak criterion)

Higher the heart rate, more oxygen is needed which limits vo2

Relate linearly. Should go up in parallel
Heart rate can provide an indirect est. of vo2

Question 14

What happens to the RER at maximal exercise?

Answer 14

It goes above 1.00 to about 1.15, which means the subject is near exhaustion because buffering adds extra co2 to expired air

Question 15

How do you find cycle ergometry workload?

Answer 15

Resistance X RPM- revolutions per minute X 6 (constant) ( m traveled per pedal revolution)

Question 16

Economy of children running vs adults

Answer 16

Children require 20-30% more oxygen per unit of body mass to run at a given speed than adults because they are not very economical

Question 17

What are you looking for in a VO2 Max test?

Answer 17

A leveling off or peaking over in oxygen uptake during increasing exercise intensity

Question 18

3 metabolic and physiological responses for establishing vo2 Max

Answer 18

Failure for oxygen uptake vs exercise intensity
Blood lactate levels that attain at least 70 or 80 my per 100mL of blood
Attainment of Max heart rate

Question 19

What is everyone’s resting VO2?

Answer 19

3.5

Question 20

What is basal metabolic rate?

Answer 20

Minimum energy requirement that sustains the body’s functions in a waking state.

Question 21

Difference in BMR in females and males

Answer 21

Females have 5-10% lower BMR than males because we have larger percentage of body fat and smaller muscle mass

Question 22

How much of the total daily energy expenditure does exercise account for?

Answer 22

15-30%

Question 23

What are some factors that affect total daily energy expenditure?

Answer 23

Physical activity
Dietary induced thermogenesis
Climate
Pregnancy

Question 24

What is relative vo2?

Answer 24

It is mL of O2 per kg per minute

Question 25

Why do vo2 Max differ between sports?

Answer 25

Because different sports require different muscle masses.

And because of the specificity of sports

Performance test must be similar to the activity or sport

Question 26

Differences between male and female vo2 Max

Answer 26

Women typically have 15-30% lower than males.

Trained- women are still 10-20%

This is because of differences in body composition and the bloods hemoglobin concentration. And men have more testosterone.