Exercise Physiology

Question 1

Definition of anaerobic threshold

Answer 1

• 50% of max VO2
• when lactate starts to rise
• Critical pO2 is reached (20-25)
• Need about 5-6 L/min of output to muscles and once that falls this is reached

Question 2

Stroke volume and HR response to exercise

Answer 2

SV increases but reaches max at about 40% of exercise then HR response has greatest affect

Question 3

Why do VE/VCO2 and VE/VO2 fall at early exercise

Answer 3

Ventilation is more efficient at higher tidal volumes

Question 4

What happens to SVR during exercise

Answer 4

Decreases due to vasodilation

Question 5

Definition of max effort on exercise test

Answer 5

RER > 1.2
VAT near 50% max

Question 6

Normal BP response with exercise

Answer 6

30-50 mmHg increase with exercise

Question 7

Normal max VO2 in teenage boys

Answer 7

About 50

Question 8

Normal max VO2 in teenage girls

Answer 8

About 40

Question 9

How much should CO increase with exercise

Answer 9

3-4 x
5X or more in athletes