I believe the answer is energy. Hope this helps. (ノ◕ヮ◕)ノ*:・゚✧
Aerobic exercise is the body producing energy WITH the use of oxygen (light activities like jogging). Anaerobic exercise produce energy without the use of oxygen and is typically a higher intensity that burns fat AND helps gain lean muscle mass (these are activities like weight lifting).
It happens during the s phase
The part of the brain that performs that function is the hypothalamus.
The Brainstem is the innermost region of the brain