Slow-twitch muscle fibers are mostly used for long endurance exercises like aerobics, swimming, and distance running. Fast-twitch muscle fibers are generally more powerful and are activated during maximum exertion exercises like heavy weightlifting and intensive, short bursts of sprints.

A few push-ups during breaks at work, walking to the grocery store, and opting to use the stairs instead of the elevator are all great ways to exercise.

It's impractical to assume people aren't going to eat out or eat late or even have pizza occasionally. And all that's fine as long as you work out, even just for 10 minutes a day.

David Kirsch Quotes