What is a good way to loose weight when mobility is limited? i need to lose weight to ease pain in my back and knees but can't excercise.

Weight loss: Are you able to exercise in water? Ultimately weight loss is by burning more calories than you consume. Must have protein in your diet and certain fatty acids.

Diet/water aerobics : Not sure how limited u are in your mobility but water aerobics/ and or swimming can help u shed calories without aggravating your knee/ back.A good idea is to visit a dietician for assistance in your dieting . Best of luck!