Exercise Physiology: Theory and Application to Fitness and Performance 9th Edition by Scott Powers, Edward Howley

Exercise 4

Graphically describe the effect of altitude on the HR and ventilation responses to submaximal work and provide recommendations for fitness participants who occasionally exercise at altitude.

Step 1 of 4

PO₂ is partial pressure of oxygen. At higher altitudes, the proportions of gasses do not alter but the partial pressures change. The partial pressures decrease with increasing altitude. The same way, the density of air also decreases with increasing altitude. The atmospheric pressure is highest at the sea level. It decreases gradually as one climbs to a higher altitude.