Unit 1: Chapter 1 Common Measurements in Exercise Physiology

Question 1

Metric System;
System International (SI) Units

Answer 1

The standard system of measurement used by Scientists;

Standardized units of measurement
What USA uses

Question 2

What is the equation for Work?

Answer 2

Work= Force x Distance

In SI Units: Work (J)= force (N) x distance (m)
(This is how Burn calories)

Question 3

Joule

Answer 3

(J) Is the basic unit adopted by the SI System for an expression of energy expenditure or work

We messaure work in Joules

Question 4

Watt

Answer 4

Unit of power

Question 5

What is the equation for power?

Answer 5

Power = Work rate

Power = work/ Time
OR
**Power = force x Velocity **

or in SI:

Power (W) = work (J) / time (s)

Question 6

What is Ergometry and what is it used for?

Answer 6

Measurement of work output

Used to calculated caloric expeduitrue

Question 7

What is Direct Calorimetry? What does it indicate?

Answer 7

measures energy expenditure by heat production
–indictaion of metabolic rate
–Anything (machine) that gives you calories burned is an Egometer

Question 8

Indirect Calorimetry
What is the conversion factor?

Answer 8

measure energy expenditure by oxygen consumption

      —Measure of oxygen consumption as an estimate of resting metabolic rate
				       Foodstuff + O2 —> Heat + CO2 + H2O
				
				1 Liter of O2 consumed = burn  5 Kcal

Question 9

What are two ways to measure Calroies burned?

Answer 9

Through heat burned or O2 Consumed

Question 10

Open-circuit spirometry
What is the equation?
Calculation of VO2?

Answer 10

Determines VO2 by measuring the amount of O2 consumed

VO2 = volume of O2 inspired − volume of O2 expired

Question 11

What is a metabolic cart?

Answer 11

Computure bike that collects gas to determine calories burned by measuring O2 & CO2 with a two-way breathing mask

Question 12

Given: 5 Kcal expended per liter (L) of oxygen consumed

Answer 12

Calculation of Kcal × min −1

Question 13

What is a MET? What are Mets used for?

Answer 13

Resting Metabolic Equivilant; (Resting VO2)

To measure energy expinditure of physical activiies interms of METs

Question 14

Linear relationship btw workout rate and VO2

Answer 14

breathe increases as work increases

Question 15

Exercise efficency

Answer 15

less energy to perform same amount of work;
less cal burned

Question 16

What are 3 Factors that effect exercise efficency?

Answer 16

Exercise intensity—Harder/more intense you work out more cal you burn
Curvilinear relationship

Speed of Movement— away from optimum speed

Muscle Fiber Type—
Slow Twitch (TYPE I) — More efficent –– Endurance
Fast Twitch (TYPE II) — Explosive (burns faster)

Question 17

(Energy expenditure) of running at a specific speed

Answer 17

Running Economy;

More efficient, less VO2 needed, fewer calories burned. Which is why they can run for so long.