3. A More Resistant Workout than Land
Want to build muscle without pain? Being in water offers 12 times more resistance than when you exercise on land.  Plus, resistance does not allow for sudden body movements that can throw off your back for instance.

4. Gets Your Brain Going
Aside from making you fitter, it will also make you a little smarter. Australian researchers recently discovered that swimming increased blood flow to the cerebral artery by 14%.