Question

_____________________________Activity is activity in which muscle cells produce energy without using oxygen. It is usually intense and short in duration. ____________________________Activity is activity in which the cells use oxygen to produce energy for movement. The intensity is low enough that the heart and lungs have enough time to replenish the oxygen supplies in the muscles. It allows you to continue this activity for long periods of time.

Answer 1

1) Anaerobic

2) Aerobic

Step-by-step explanation:

Aerobic means with oxygen

Anaerobic means without