How to Start Swimming- People sometimes worry about swimming’s influence on weight loss. Skeptics say it’s impossible to lose weight swimming, but it is possible. In fact, combined with a healthy balanced diet, swimming regularly can help people lose weight as easily as other physical activities, such as running. For people who are overweight, swimming is perhaps the best way to exercise because it alleviates stress on the leg joints. Swimming has the added benefit of providing a total body cardiovascular workout unlike any other.