The key to losing weight by swimming is swimming for a long time. Generally about 1.5 hours each time, at least 3 times a week. My suggestion is around 9 am or 3 pm. If you want to lose weight successfully, you should control your diet properly, and don't take supplements except normal diet. Swimming consumes a lot of energy and has a strong appetite after exercise. At this time, it is very important to control your diet. General swimming is not successful in losing weight. One is short exercise time, and the other is uncontrolled diet.