Just as plants use photosynthesis to convert light energy into chemical energy, we humans have our own metabolic processes to convert consumed (or stored – in the form of fat) chemical energy into mechanical energy (movement). Whether your blinking or smashing out some squats; to create energy, in the form of force – you require energy, in the form of ATP. ATP is the bodies dollar (reserve currency) and is created via the metabolisation of glucose (carbohydrates) or lipids (fats). There a three systems through which this metabolisation takes place: