Energy expenditure

Question 1

What’s the equation for RER?

Answer 1

VCO2/VO2

Question 2

What does RER stand for?

Answer 2

Respiratory energy ratio

Question 3

What is energy measured in?

Answer 3

Joules or kilocalorie

Question 4

What is the purpose of energy?

Answer 4

Growth, repair , digestion , storage , PA

Question 5

What is the common link in optimising endurance performance?

Answer 5

Conservation of energy

Question 6

What’s the supply of energy?

Answer 6

1st law of thermodynamics

Question 7

What is direct calorimetry

Answer 7

Direct measure of heat production

Question 8

What is indirect calorimetry

Answer 8

A measure of CO2 production and O2 consumption

Question 9

What’s a example of indirect calorimetry

Answer 9

Douglas bag

Question 10

What’s the equation for energy expenditure?

Answer 10

VO2 (Lmin-1) x kcal equivalent (kcal L-1)

Question 11

What’s a bomb calorimetry

Answer 11

Bomb calorimeters operate on the principle of direct calorimetry measuring the heat liberates as the food completely burns

So , directly measures the energy value of the food

Question 12

How does a bomb calorimeter work

Answer 12

The food is within a sealed chamber charged with oxygen at high pressure
An electric current moving through the fuse at the tip ignites the food
As the food burns a water jacket surrounding the bomb absorbs the heat liberated

Because the calorimeter remains fully insulated , the increase in water temp directly reflects the heat released during a foods oxidation (burning)

Question 13

How many joules in 1kcal

Answer 13

4186 J

Question 14

What’s the RER calculation for carbohydrates

Answer 14

CHO =VCO2/VO2 = 6CO2/6O2 =1.0

Question 15

What’s the RER calculation for fats

Answer 15

FAT=VCO2/VO2=16CO2/23O2 =0.70

Question 16

What is the average daily energy expenditure

Answer 16

1800-3000

Question 17

What is metabolic rate

Answer 17

Rate of which energy is used

Question 18

What is basal metabolic rate

Answer 18

Minimum amount of energy to carry out essential physiological functions

Question 19

What is resting metabolic rate

Answer 19

Like basal metabolic rate but does not require the participation to fast or sleep

Question 20

What factors affect resting metabolic rate

Answer 20

Age 
Bsa
Body temp
Hormones 
Psychological stress

Question 21

How do you calculate relative vo2

Answer 21

Vo2 x 1000 / bodymass

Question 22

1MET=

Answer 22

3.5ml

Question 23

What are the 3 energy systems

Answer 23

ATP PCR
GLYCOLYTIC
OXIDATIVE

Question 24

WHATS ATP PCR

Answer 24

One energy system that is high power and short duration

Question 25

Where is ATP PCR produced

Answer 25

In the sarcoplasm

Question 26

What is the GLYCOLYTIC system

Answer 26

Second energy system moderate power and short duration Breakdown of sugar and carbs Can be anaerobic of aerobic

Question 27

What is the oxidative system

Answer 27

Third energy system low power and long duration Found in the mitochondria Can only be aerobic I.e kerbs cycle