You’ve heard it before: Some things are better together. Studies show working out with a partner has more benefits than hitting the weight rack or treadmill solo. Doing a workout with a friend, coworker, or significant other can increase accountability, keep spirits high, and even spur better results. (Bonus: It can also rev libido. ) With that in mind, here are 29 creative exercises that prove teamwork can make your workouts a lot more fun.