Question

97. What occurs when exercise begins and the intake of oxygen doesn't immediately meet the demands?
A. Oxygen deficit
B. Oxygen debt
C. Aerobic fitness
D.
Anaerobic fitness

Answer 1

a) Oxygen deficit occurs when exercise begins and the intake of oxygen doesn't immediately meet the demands.

Explanation:

• The oxygen deficit was defined as the sum of the minute differences between the measured oxygen uptake and the oxygen uptake occurring during steady-state work at that same rate.
• At the start of an exercise bout, some of the energy must be supplied through anaerobic mechanisms because the aerobic system responds slowly to the initial increase in the energy demand.
• This anaerobic contribution to the total energy cost of exercise is termed the oxygen deficit.
• The amount of oxygen required to remove the lactic acid and replace the body's oxygen reserves is called the oxygen debt.
• Aerobic fitness is an endurance-type exercise that increases a person's heart rate and breathing rate over relatively long durations.
• Anaerobic fitness is exercises that involve short bursts of intense activity.