Second, It can make you physically fit, you don't get to bid your gym membership goodbye. But, it turns out that couples who exercise together have more success than people who sweat solo. According to certified fitness trainer and nutritionist Jay Cardiello, "nearly half of people who exercise alone quit their programs after one year, but two-thirds of those who work out with a loved one stick to it." Even better: Both men and women work between 12 and 15 percent harder when training with a romantic partner. Whether it's the excitement of being together or the extra push to keep up with your partner, sweating à deux clearly has its benefits. To reap the rewards, try scheduling in gym sessions with your honey during a time when you'll both be able to commit, like in the morning or during lunch.