Physical Activity Guidelines for Americans, 2nd Edition

Starting to exercise again after a long break requires a different approach than beginning for the first time. The science shows that your body remembers — but your schedule, motivation, and habits need rebuilding from scratch. Here's how to do it without burning out again.

Starting an exercise habit is hard — but the research points to clear, specific factors that determine success or failure. This guide covers what beginners actually need to know to start exercising and stick with it.