Most individuals you see in the gym are there because they have been told it is good for them. They're told they need to get 150 minutes moderate intensity physical activity per week, which they usually do by slogging away on the treadmill, elliptical or stationary bike. But are they really better off? Are they actually getting fitter?

Our bodies, in their infinite sophistication, employ 3 primary energy systems which are the ATP-PCr, Anaerobic-Glycolytic and the Aerobic/Oxidative system

We will start by discussing how energy in the muscle is used.

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