Lecture 8

Question 1

What is the more accurate way of taking physiological measurements: Treadmill or cycle ergometer?

Answer 1

Cycle is more accurate
-Cycle has more precise changes in intensities
-Treadmill poses the risk of falling

Question 2

Which modality (arm cranking or leg cycling) results in a higher blood pressure?

Answer 2

Arm cranking results in a higher increase in blood pressure

Question 3

Which modality (arm cranking or leg cycling) requires more ventilation for the same oxygen uptake?

Answer 3

Arm cranking requires more ventilation for the same oxygen uptake
-Likely due to smaller muscle groups involved, decreasing it’s efficiency

Question 4

What is the diving reflex?

Answer 4

When submerged in water, our heart rates decrease to preserve O2
-Kicks in noticeably at 15 seconds of submersion

Question 5

Oxygen cost of work formula

Answer 5

mlO2/watts

Question 6

Bohr effect

Answer 6

Once past anaerobic threshold, although PO2 remains the same, however HbO2 saturation is decreased
-Due to decreased pH

Question 7

How many mLs of O2 required for 1 watt of power output?

Answer 7

10mL/W