Which environmental factor is described as having less oxygen at high altitude?

Which environmental factor is described as having less oxygen at high altitude?

• A. Temperature
• B. Air quality
• C. Cold weather concern
• D. Altitude

Answer: (D)

Less oxygen at high altitude comes from thinner air as you climb. The atmospheric pressure drops with elevation, reducing the partial pressure of oxygen and making less oxygen available to the body during exercise. This environmental factor is altitude, because it directly describes the condition that lowers oxygen availability. Temperature, air quality, or cold-weather concerns describe other aspects of the environment and don’t inherently indicate reduced oxygen. In practice, exercising at altitude may lower endurance and VO2 max, so you’d adjust intensity, pace, and allow for acclimatization as needed.

Less oxygen at high altitude comes from thinner air as you climb. The atmospheric pressure drops with elevation, reducing the partial pressure of oxygen and making less oxygen available to the body during exercise. This environmental factor is altitude, because it directly describes the condition that lowers oxygen availability. Temperature, air quality, or cold-weather concerns describe other aspects of the environment and don’t inherently indicate reduced oxygen. In practice, exercising at altitude may lower endurance and VO2 max, so you’d adjust intensity, pace, and allow for acclimatization as needed.