There's a way to get healthier without even going to a gym. It's called NEAT
text.npr.org
text.npr.org
Admittedly, being able to better understand quantitatively has some value. There was a study not long ago showing that ‘active’ commuting (biking or walking) had a real benefit, because people did it every day, whether they felt like it or not.
genesis (generating of) thermo (heat), i.e. burning calories