Chapter 1: Common Measurements in Exercise Physiology Flashcards

1
Q

define physical activity

A

moving your body (walking, writing, etc.)

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2
Q

define physical fitness

A

ability of body systems to work together efficiently to optimize health

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3
Q

define exercise

A

intending to engage in physical activity in order to improve physical fitness

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4
Q

define acute response and give an example

A

how the body responds to the acute stress of a single bout of exercise (what is happening during a 2 mile run)

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5
Q

define chronic adaptations and give an example

A

how the body responds to the chronic stress of repeated bouts of exercise (what is happening during a 3+ month training program)

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6
Q

characteristics of an experimental study design

A

researchers manipulate experimental variables, subjects randomly assigned to two or more groups

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7
Q

characteristics of an observational study

A

researchers do not manipulate experimental variables, subjects divided based on past exercise history

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8
Q

6 factors that make studies and study results accurate and reproducible

A

1) physiological variables are relevant to the sport
2) tests are sport-specific
3) equipment is calibrated
4) tests repeated at regular intervals
5) testing procedures should be carefully controlled
6) tests should be valid and reliable

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9
Q

when would you use a line graph

A

when both IV & DV are quantitative (time series data)

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10
Q

when would you use a bar graph

A

when comparing values across categories or groups (IV is not quantitative)

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11
Q

when do you use a dependent t-test

A

same subject being tested twice (1 IV)

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12
Q

when do you use an independent t-test

A

two independent groups (1 IV)

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13
Q

when do you use RM-ANOVA

A

same subjects being tested multiple times (2+)

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14
Q

when do you use one-way ANOVA

A

3+ independent groups (1 IV)

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15
Q

when do you use factorial ANOVA

A

4+ independent groups, 2+ independent variables

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16
Q

formula and SI units for work

A

work (J) = force (N) x distance (m)

17
Q

formula and SI units for power

A

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

18
Q

describe direct calorimetry

A

measures heat production as an indication of metabolic rate

1) subject placed in chamber surrounded by insulated water jacket
2) thermometers in the water jacket measure temperature changes in the water
3) knowing the specific heat of water ( 1cal/deg*g) and the mass of water in the jacket (g), the heat loss (C) from the subject to the walls of the chamber can be calculated

19
Q

describe indirect calorimetry

A

measures O2 and CO2 production as an indication of metabolic rate

20
Q

pros of direct calorimetry

A

accurate over time for resting metabolic rate

21
Q

cons of direct calorimetry

A

inaccurate when exercise equipment involved (equipment produces heat) & its expensive

22
Q

pros of indirect calorimetry

A

accurate, even while exercising

23
Q

cons of indirect calorimetry

A

slow

24
Q

SI units and formula for absolute VO2

A

absolute VO2 (L/min) = ventilation rate (L/min) x (FIO2 - FeO2)

25
Q

SI units for relative VO2

A

ml/ kg*min

26
Q

how to convert relative VO2 to METs

A

1 MET = 3.5 mL/kg*min

27
Q

formula for exercise efficiency

A

net efficiency (%) = (work output / energy expenditure) x 100

28
Q

Cyclist A performs 60 calories of work per unit time and metabolizes 210 calories. Cyclist B performs 50 calories of work per unit time and metabolizes 200 calories. Which cyclist is more efficient?

A

Cyclist A: 60/210 = 28.6%
Cyclist B: 50/200 = 25%

Cyclist A is more efficient.

29
Q

3 factors that influence exercise efficiency

A

1) exercise work rate
2) speed of movement
3) muscle fiber type

30
Q

as work rate increases, what happens to efficiency?

A

efficiency decreases

31
Q

how does speed of movement effect exercise efficiency?

A

there is an optimum speed of movement and any deviation decreases efficiency

32
Q

how does muscle fiber type influence exercise efficiency?

A

muscles that have a greater percentage of type 1 (slow) fibers have higher efficiency

33
Q

define running economy

A

oxygen cost of running at a given speed

34
Q

how does relative VO2 help to determine running economy?

A

lower relative VO2 at the same speed indicates better running economy