[sidebar]

  1. Stand-Up Paddle-boarding (SUP)Average calorie burn: 430 per hourEach stroke tones your back and arms and you’ll sneak in a core workout, too. As you coast across the water, you’ll be using your abs to balance on the oversize surfboard. (And trust us: It’s easier than you’d think!)
  2. Aqua ZumbaAverage calorie burn: 500 per hourZumba fused its high-energy Latin dance moves with aqua aerobics to create a seriously fun pool-party workout. (These Prevention readers had great results outside the pool, too.) “The harder you push against the water, the more effective the workout,” says co-creator Maria Browning. Find a class at zumba.com. 
  3. Deep-Water RunningAverage calorie burn: 575 per hourRunning while wearing a flotation vest (feet shouldn’t touch the pool floor) targets the same muscles you use on dry land but is extra gentle on joints. Plus, the water’s resistance provides an added toner for your arms. More from Prevention: Swim Yourself Slim!