Question

Walking at a moderate intensity for 30 minutes would primarily rely on which energy system?

1) Aerobic energy system
2) Anaerobic energy system
3) ATP-PC energy system
4) None of the above

Answer 1

Moderate-intensity walking for 30 minutes relies on the aerobic energy system, which uses oxygen to produce ATP for sustained energy.

Step-by-step explanation:

Walking at a moderate intensity for 30 minutes would primarily rely on the aerobic energy system. This system uses oxygen to convert nutrients (such as glucose) into adenosine triphosphate (ATP), which provides the energy for muscle contractions. Unlike the ATP-PC energy system that provides energy for short bursts of high-intensity activity or the anaerobic system that comes into play during higher-intensity activities typically lasting less than two minutes, aerobic metabolism can supply ATP as long as there is sufficient fuel and oxygen. It is the preferred energy system for endurance activities and can sustain ATP production for several hours during activities such as walking.