While workouts like high-intensity interval training (HIIT) have only been popular since the early 2000s, many other types of exercise have been around much longer. Pilates, for instance, began nearly ...

You're currently following this author! Want to unfollow? Unsubscribe via the link in your email. Follow Gabby Landsverk Every time Gabby publishes a story, you’ll get an alert straight to your inbox!