Swimming is fantastic for weight loss, it's about as good as running, easier on the joints, and uses muscles besides just the legs so I definitely recommend doing that whenever you can.
Member of DaJoGen MMA school under Dave Hagen and Team Chaos fight team under Denver Mangiyatan and Chris Toquero, ran out of Zanshin Martial Arts in Salem Oregon: http://www.zanshinarts.org/Home.aspx,