1. Mary is aware of the many ways the body adapts totraining at high altitude. She is a competitive runner and wondersif training in high-altitude environments will help her performanceat sea level. She wants to implement a \"live high, train low\"strategy. How could she achieve this?

a. Live and train at high altitude for one month and thencompete at sea level.

b. Move to a town with higher elevation and train in herneighborhood.

c. Sleep in a simulated high altitude environment and train atsea level.

d. Sleep in a simulated sea-level environment and train in ahigh altitude environment.

2. Jim lives at sea level and is planning to hike PikesPeak at an altitude of 14,000 feet. As you know, there areenvironmental differences between locations at sea level andlocations at higher elevations.

Which of the following statements are trueabout the environmental differences between sea level andhigh-altitude environments? Select all of the true statements.

Select one or more:

a. Reduced barometric pressure increases oxygen availability inthe blood.

b. Regardless of elevation, the Earth's atmosphere is alwayscomprised of 20.93% oxygen.

c. As altitude increases, air temperature tends to decrease.

d. Cities at sea level tend to have an average barometricpressure of 430 mmHg.

e. As altitude increases, barometric pressure decreases.

3.

f. At higher altitudes, the atmosphere has a reduced ratio ofoxygen to carbon dioxide.

g. As partial pressure of oxygen decreases, it becomes moredifficult for the body to deliver adequate oxygen throughout thebody.