Swimming workouts burn fat, trim inches and help you get stronger, fitter and healthier than ever. Swimming vigorously can burn up to 500-700 calories an hour, whether you do a breaststroke or freestyle. It’s a highly effective form of exercise for weight loss and toning. Swimming engages all of the major muscle groups, from your abdominals and back muscles to your arms, legs, hips and glutes. It can be your sole form of fitness but can effectively compliment other exercises like walking and running as well. So go ahead, make a splash, lose weight and feel great.