If you've got 22 minutes, you can get an effective total-body workout. Supreme Court Justice Ruth Bader Ginsberg's personal trainer, Bryant Johnson, walks us through an interval session and explains why it's so effective.

Life Kit is excited to bring you more episodes but we're making some changes to how we organize things. Starting in the new year, this three-part guide will disappear, but all of the episodes will still be available — they are just moving to our main Life Kit feed. Search your podcast app for Life Kit from NPR and subscribe so you never miss an episode.

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Falling off the exercise wagon more than you'd like? These strategies, based on economics and the science of habit formation, can help. Plus, you get to binge-watch TV.

Just thinking differently about moving your body can help make all those excuses disappear — and we have the science to back it up.

A lot of us love to hate exercise. In these episodes, we talk to the experts about how to think differently about exercise so that it fits right into your life, for good.