What leisure activity can be done to provide a great workout without sweating?

One clue: it involves water.

That's right, swimming.

So Why Is Swimming So Good?

Swimming works your whole body, improving cardiovascular conditioning, muscle strength, endurance, posture and flexibility, all at once. Your cardiovascular system benefits especially because swimming improves the body's use of oxygen without overworking the heart. The resting heart and respiratory rate are reduced, increasing blood flow to the heart and lungs. If you're looking to lose weight, swimming is just the ticket. On average, a swimmer can burn as many calories in an hour as a runner who runs six miles in one hour. Simply put, some call swimming the perfect form of exercise.