In exercise physiology, aerobic power P is defined in terms of maximum oxygen intake. For altitudes up to 1,800 meters, aerobic power is optimal-that is, 100%. Beyond 1,800 meters, P decreases linearly from the maximum of 100% to a value near 40% at 5,000 meters. Estimate aerobic power at the altitude of 2,400 meters.
A)72.5%
B)93.8%
C)72.6%
D)88.3%
E)88.75%

Question

Quizplus · Accepted Answer

The decrease in aerobic power from 1,800 meters to 5,000 meters is linear. The difference in altitude is 3,200 meters (5,000 - 1,800), and the decrease in aerobic power is 60% (100% - 40%). Therefore, the rate of decrease is 60% / 3,200 meters = 0.01875% per meter. At 2,400 meters, the altitude is 600 meters above 1,800 meters. The decrease in aerobic power is 600 meters * 0.01875% per meter = 11.25%. Thus, the aerobic power at 2,400 meters is 100% - 11.25% = 88.75%.

In Exercise Physiology, Aerobic Power P Is Defined in Terms