Sure, there's nothing wrong with that approach. But, for the same reason that you might put shoes on your feet when you go do something outside, you might find

Sure, there's nothing wrong with that approach. But, for the same reason that you might put shoes on your feet when you go do something outside, you might find employing certain other technological advances useful in achieving your goals. We don't, after all, burn wood in our cars, we use gasoline -- even though the fundamental principle underlying both is the release of energy stored in hydrocarbon-based fuel. The difference is a step-function in refinement. It depends on how goal-directed you are in this domain. Others may have higher, more specific, or more urgent health/fitness goals.