Marine Corps Physical Fitness Test. Fitness is essential to the day-to-day effectiveness and combat readiness of the Marine Corps. The Marine Corps considers physical fitness an indispensable aspect of leadership.
A: Chemical energy is for producing heat in the human body to sustain vital functions, converting solar energy in plants through photosynthesis, producing electrical energy in batteries to power devices and burning fossil fuels in combustion engines to produce heat or motion.
Your body has 3 main energy systems (with 2 sub systems): 1  Phosphagen system (consisting of Adenosine Triphosphate system (ATP) and Creatine Phosphate) - ATP is what your body ACTUALLY uses as energy. 2  Glycogen store (glycolytic system or anaerobic system) - is glucose stored in your body.