Yes, the treadmill is fun and so are those dumbbells, but it can be easy to get stuck in a workout rut. If you’re looking for a total-body routine that burns a ton of calories (and doesn’t involve having to brave the frigid cold in any way), give swimming a try. From toning your core to speeding up your metabolism, here are eight reasons why it’ll be your new go-to form of exercise—all year long. Swim spas can make this as easy as walking out your back door. The Above Ground Pool & Spa Company has several models of exercise pools on display.SWIM SPA 063