# Lab 3D - Aerobic Tests

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Kinesiology

### Purpose

learn the basis and technique involved in administering the YMCA Cycle Ergometer Test, Astrand-Ryhming and Bruce Treadmill Test for estimating Aerobic capacity/power.

with oxygen

### For Muscles to be supplied with increased oxygen these must occur

1) increased cardiac output
2) increased ventilation
3) a diversion of a greater proportion of the cardiac output to the active muscles.

### Cardiac Output

the amount of blood pumped by the heart each minutes, is usually expressed as liters/minutes

HR x SV

### Stroke Volume

the amount of blood pumped per beat of the heart

### VO2Max

SV x HR x A-VO2 difference

### A-VO2 difference

the difference between the amount of O2 extracted or consumed by the muscles and body(arterial minus venous blood O2 difference).

### The YMCA and Astrand-Ryhming cycle test and Bruce Treadmill Test can be used as a test of___

Physical Work Capacity (PWC) or cardiorespiratory fitness and can be used to ESTIMATE maxVO2

### Tests are based on the following

1) as cardiorespiratory fitness increases, heart rate at a given sub-maximal workload decreases
2) the higher cardiorespiratory fitness results in a higher max VO2

### Tests used to estimate maxVO2 include:

step-bench tests, the 9 and 12-min run tests and 1 to 1.5 mile run tests.

### Maximal Oxygen Uptake(VO2max) estimates in

Liters per minute (l/min) for the Astrand-Ryhming Test

Age Correction

### YMCA Cylce Test

Can be used to predict VO2 based on the linear relationship between HR and work rate (VO2) at a heart rate over 110

### YMCA Test

mustextrapolate HR-work rate relationship out to max HR

50

150 kgm = 0.5 kp

3 minutes

### Take heart rate during the last ______

2 min of each stage

5

ONLY

HR>110

### ml/kg/min =

(L/min x 1000)/body wt in kg

50

3

Example: