Swimming is one of the best workouts. When It was calculated how many calories some of the top Olympic swimmers are consuming it worked out to be so much that in theory they should be obese, even considering how much work they are doing each day.
It was discovered that the thermal load and extra pressure put on your body while you are submerged forces your body to work a lot harder than normal and you are burning calories at a highly accelerated rate.
The fact that you use a lot of different muscles than normal land based exercise also helps contribute to the amazing weight loss properties you get from swimming.
If you haven’t been swimming for a while you will have a very sore set of muscles the next day, particularly your core muscles. You will notice that most swimmers have a very strong core – this is no coincidence.
If you want to know how to get abs then swimming is one of the best ways to do it.