Energy Expenditure Metabolic Testing

Question 1

BMR

Answer 1

basal metabolic rate is the min amount of energy to sustain vital functions in the waking state

Question 2

RMR

Answer 2

resting metabolic rate is measured 3-4 hours after a light meal w/o prior physical activity

Question 3

Physical activity varies TDEE. T/F

Answer 3

True

Question 4

What organ uses the most oxygen at rest?

Answer 4

Liver, always working. Needs oxygen to do that.

With movement it will shift to skeletal muscles.

Question 5

Metabolic rate is based off…

Answer 5

Surface area

Question 6

Men and women BMR differences.

Answer 6

Women more body fat and less FFM, so 5-10% lower BMR

Question 7

As you age men and women reduces % BMR per decade?

Decreasing caloric rate…

Answer 7

2-3%

Due to body comp changes

Question 8

When we connect someone to a metabolic cart it’s called…

Answer 8

Indirect calorimetry

Since we’re not directly measuring at cellular level.

Gas exchange at the mouth is measured.

Question 9

Absolute VO2

Answer 9

Amount measured

L/min

Question 10

Relative VO2

Answer 10

(ml/kg/min)

Average is 40…

Question 11

MET

Answer 11

categorization of activities to compare light/heavy
Multiples of RMR
1 MET = 3.5 ml/kg/min off O2

Question 12

For ever liter of O2 consumed how many kcal of energy are expended?

Answer 12

5 kcals

Question 13

HR and O2 consumption have linearly relationship?

Answer 13

Technically true, but more of a sigmoidal

Question 14

You can estimate from submax?

Answer 14

True

Question 15

More efficient person

Answer 15

Can have same HR as untrained, but able to use more oxygen

Question 16

VO2max

Answer 16

Max amount of O2 that can be used per min of exercise.

The more you use the more efficient, the less work your muscles are working…

Question 17

VO2 is based on…

Answer 17

1) Cardiac output

2) Arterial venous O2 different

Question 18

What time should VO2max be reached?

Answer 18

8-12 minutes

Question 19

How do you know VO2max is achieved? (4)

Answer 19

1) plateau in VO2 w/ increasing intensity
2) reach age-predicted max HR
3) reach an RER above 1.15 at max
4) blood lactate level of at least 8 mmol
* 3/4 is criteria, but plateau alone is fine if symptomatic

Question 20

Most people reach…

Answer 20

VO2peak

due to symptoms…

Question 21

Factors affecting VO2max

Answer 21

Heredity
Gender
Body size & comp

Question 22

Endurance/walk test have how much error?

Answer 22

8-10%

12-min test

Question 23

Central limitation

Answer 23

Using large amount of muscle mass (arm and legs)

Usually don’t test this b/c of the limitations…

Compromises SBP and blood flow to body

Increases:
BV
RBC mas
Stroke volume
CO
DV
PV

Question 24

Peripheral adaptation

Answer 24

VO2 increases after training the trained leg vs. the non-trained leg

Increases:
Capillary density
Mitochondrial density
Mitochondrial enzyme activity
Muscle respiratory capacity
O2 extortion from blood