Exercisse testing and interpretation

6 important questions on Exercisse testing and interpretation

Welke reacties kunnen gemeten worden met cardiopulmonary exercise testing(CPET)

reacties in de cellen, in het cardiovasculaire systeen en ventilatoire systeem

What 3 system can be measured simultaneously with CPET?

1. The cellular system
2. Cardiovascular system
3. Ventilatory system

Why needs CO2 to be removed from the body quickly?

Because it increases the acidity of the cells (CO2+H2O-->H2CO3-->H+ +HCO3 -
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What causes an extra increase in ventilation to provide respiratory compensation for metabolic acidosis?

The extra CO2 formed by the buffering of H+ (produced by lactate)

How can stroke volume be determined by CPET?

Work load needs to be specified at a specific intensity. CPET can provide the O2 consumption (VO2). For every litre of O2 is 5 litre blood required. In combination with heart frequency stroke volume can be provided.
1.5 O2 with a heartbeat of 90 bpm: 7.5 litre blood is needed. 7500 mL / 90 bpm = stroke volume of 83.33 mL

What difference would become visible in a diagram when you compare exercise below anaerobic threshold with exercise above AT.

When performing above AT, O2 supply is inadequate and lactate is formed. Because CO2 released by the the buffering from HCO3 - the VCO2 increases in excess of VO2. When performing below AT O2 supply is sufficient to provide regeneration of ATP.

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