Exercise Physiology

Question 1

Indications

Answer 1

Eval for Exertional dyspnea
Development of exercise prescription
Measures peal O2 consumption
Prognosis of heart failure
Optimization of pacemaker
Disability determination
Assesses regurgitant valvular heart disease

Question 2

O2 Consumption

Answer 2

VO2 (O2 per kg per min)
Can be converted into METs (3.5 ml)

Question 3

Measuring VO2

Answer 3

Direct calorimetry
Indirect calorimetry
Open circuit spirometry

Question 4

Anaerobic Threshold/Ventilatory Threshold

Answer 4

The time when:
Blood lactate, increases
Work level, increases
Ve (min ventilation), increases

Determined by visual estimation
Workloads below AT can be sustained for prolonged periods

Question 5

Respiratory Exchange Ratio: RER

Answer 5

RER = VCO2 / VO2

Partly dependent on fuel used for metabolism Related to effort during test
- Over 1.2 generally excellent effort
- 1.1–1.2: good effort

Question 6

Oxygen Pulse

Answer 6

Oxygen consumed per heart beat

Question 7

Rate Pressure Product: RPP

Answer 7

HR x systolic blood pressure
Reliable indicator of myocardial oxygen consumption (MVO2)

Question 8

Other than the R value, what else falls during exercise testing?

Answer 8

PH and HCO3 - supports good effort

Question 9

How to calculate VO2 peak and peak MET?

Answer 9

Convert VO2 from liter to milliliters
Divide by body weight
Decide by 3.5 (the MET conversion)