Question

1. Mark is a healthy adult male from Miami who has been living at high altitude for five weeks. What physiological changes have likely occurred due to being at high altitude for that amount of time? Select all that apply.

Select one or more:

a. Decreased max heart rate

b. Decreased cardiac output

c. Decreased ability to drink water

d. Increased red blood cell production

e. Increased blood volume

2.Anna lives and trains at sea level, but has to travel to a one-day athletic competition occurring at high altitude. According to the textbook, what strategy should she use to maximize her performance at high altitude for this event?

Select one:

a. She should cut back on training intensity three weeks prior to the event.

b. She should not compete at high altitude.

c. She should arrive at altitude as close to the event start time as possible.

d. She should train at high altitude for at least two weeks prior to the event.

f. Increased cardiac output at rest

g. A reduction in muscle mass

Answer 1

ANSWER :

1. The individuals who live at high altitudes have some specific physiological changes in their cardiovascular system, such as increased red blood cells (RBCs) production to transport maximum oxygen to body tissues, slightly high heart rate, and increased cardiac output to enhance the blood supply in organs. At high altitudes, the loses of water through respiration become twice in compare at sea level, therefore increases thirst to drink water. Hence option (d) is the only the correct answer choice.

2. If an individual/athlete lives and trains at sea level, but has to travel to a one day athletic competition occuring at high altitudes, then it should train at high altitude for at least two weeks prior to the event, because it prepare or acclimatize the body to cope low oxygen atmosphere. Hence option (d) is the correct answer choice.