Swimming is an excellent exercise for not only reducing belly fat, but building muscle as well. Swimming is also a full body workout, which means it will target almost every muscle in the body. But most swimming pool are limited by the space, there are new kind of swimming pools, with hi-tech technology that can create river like flow in swimming pools. One of my friends bought such a poo. He told me that it was from a company named Esperanzamas. There is a link to the site here. Good luck, I hope this helped.