Exercise Phys (Heat)

Front 1

Cardiac output

Back 1

Heart rate and stroke volume

Increases with

-increased muscle size

- increased wall Thickeness

Front 2

Minute ventilations factors

Back 2

1. Diffusion (positive correlated)

2. Capillary to alveloi matching (positive)

Front 3

O2 delivery factors

Back 3

Cardiac output

Minute ventilation

O2 carrying capacity of blood

Tissue capillarization

Front 4

Alberto Salazar

Back 4

Won Boston marathon in the heat

Lost 8L of water and was never quit the same

Front 5

Main limitations with exercising in the heat

Back 5

Competition for cardiac output between exercising muscle and skin for dissipation

Front 6

Conduction

Back 6

When your in direct contact with something

Front 7

Convection

Back 7

Air or water mvoes across skin to make you feel warmer or cooler

Front 8

Hormones durning PA in heat

Back 8

Activate to retain water and salt

Front 9

Max temp can change before there is damage

Back 9

6° C

Front 10

How much faste does water conduct heat compared to air?

Back 10

25x

Front 11

What is the worse athletic uniform to wear in the heat

Back 11

Football

Front 12

6 factors that affect the insulation value if clothing are

Back 12

1. Body movements

2. Bellow effect

3. Chimney effect

4. Water vaper transfer

5. permeation efficiency factor

6. Wind speed

Front 13

What is the bodies major defense against overhetaing

Back 13

Evaporation

Front 14

Clo unit

Back 14

Is an index of thermal resistance

Front 15

PCr uses what energy system?

Back 15

Anerobic alactate

Front 16

Helath risk if exercising in the heat

Back 16

1. Heat cramps

2. Heat exhaustion

3. heat stroke

Front 17

Acclimatzing to heat time/duration

Back 17

Takes roughly 2 weeks

-less than 50% 90-100mins

- or less than 70%vo2 max 50-60mins

Front 18

Benefits to acclimatizion

Back 18

Sweat concentrate decreases (less salt loss)

Increase sweet rate (increase evaporation)

Front 19

Early adaptation to heat acclimatizion

Back 19

1. Improved cardiovascular function

2. Increase plasma (stroke volume)

3. ADH (retain water)

4. Aldosterone (retain salt)

5. Decreases heart rate

6. Redirect cardio output to skin and muscles

Front 20

Long lasting adaptations to heat

Back 20

1. Increase sweat sensitivity (onset and rate)

2. Decrease electrolytes in sweat (loss less electrolytes)

3. Decrease skin blood flow

4. Decrease competition between muscle and skin

Front 21

MET at rest

Back 21

3.5ml/kg/min (relative)

Front 22

3 factors that affect total daily energy expenditure

Back 22

1.resting metabolic rate

2. Thermogenic effect

3. Energy expended

Front 23

MET

Back 23

Metabolic equivalent at rest

3.5

Front 24

BMR

Back 24

Basal metabolic rate

Minimum level of enrgy to sustain vital functions in the waking state

-reflects the body's total heat production

Front 25

RMR

Back 25

Resting metabolic rate

Always slgihtly higher than BMR (include body size, etc.)

Front 26

Estimated value to BMR/RMR

Back 26

Within 10% accurate

Front 27

Effects of regular PA on BMR

Back 27

Offset decreases with age(burn more calories even post exercise)

Front 28

What organs consume a lot of VO2

Back 28

Liver = 40%

Brain and muscle = 20% each

Heart is lowest (of the main ones)

Front 29

5 factors that affect TDEE

Back 29

1. PA

2. Diet induced thermogenesis

3. climate

4. Pregnancy

5. Calorigenic effect of food on exercise metabolism

Front 30

pA and energy expenditure

Back 30

Largest variable

Front 31

Diet induced thermogenesis and energy expenditure

Back 31

After you eat you use more energy!

1. Obligatory thermogenesis (digestion and absorption of food)

2. Facultative thermogenesis (sympatheitc NS increases metabolic rate)