Problem: She-Ra competed in the 2022 Ironman triathlon in Etheria. During this event she swam 3.8 km, rode a bicycle for 180 km and ran for 42.2 km (in that order) in a time of 4 hrs, 12 minutes, placing her 1st in the competition.
Discuss the role of the muscular system in She-Ra's thermoregulation during the triathlon. Include how the homeostatic control of body temperature differs when She-Ra enters the cold ocean water for the swim component of the event in comparison to the cycling and running components.