Dancing helps you loseweight!by
It strengthens the abdominal muscles; therefore, helping to have a better posture... on a mind-numbing treadmill or exercise bike. It helps with flexibility, balance, posture and co-ordination...
lift weights! upper body if the knee prevents things like lunges and squats. building muscle mass will probably do more than cardio to help...but some of each is probably best. well running wouldnt be good