I’ll be honest, some days I barely have time to eat, let alone break a sweat. Which is why I am so, so thankful for the the Internet, where you can find all sorts of workouts to squeeze into a time-crunched schedule. These workouts might be short—each one is under 10-minutes long—but boy are they intense. And an added bonus? They’re all free! If you’ve got more time on your hands, check out more of our favorite YouTube workouts.