What it works: Everything
Why it’s cool: If you want to work every muscle in your body to Burn Serious Calories—and we literally mean every single one—rock climbing is your go-to sport. From your forearms and fingers (grip strength for the win) to your back, core, butt, and legs, no muscle gets left behind. Not sure if you’re ready to hit the great outdoors to cover a route? Liz Letchford, trainer for The North Face Mountain Athletics workouts, suggests trying bouldering at your local rock climbing gym first. You won’t be in a harness, and you’ll practice moving across various routes while staying close to the wall. “If you can hold onto the wall and stay close to it for a few routes, even if they’re easier ones, then you’re good to go outside,” she says. “Just take it down a notch in grade [that’s your level of difficulty] from what you do in the gym until you’re more comfortable with the outdoor conditions, and always go with someone who knows what they’re doing and is comfortable with the route you’re trying to climb.”
Calories burned: 645
All calorie estimations provided by Adam Rosante, certified trainer, and based on a 30-year-old woman, 5’5″ in height and 130 pounds, doing the sport for one hour.