losing weight

Water Aerobics and swimming would be the best. The water would take the weight of your body off your knee while you still got some exercise in and it is good for your whole body. I know that I hate to swim but I was thinking of joining the water aerobics class at my local YMCA.

I was also going to recommend water aerobics. You don't have to know how to swim. Most likely it's in water that's shallow enough to stand in but if not I'm sure you can hold onto a floatie or wear a vest. Even kicking while holding onto the side of the pool is good exercise. You can also do sit ups for abs, lying leg raises, flutter kick while on your stomach for your back, push ups, yoga...you can do lots of non-impact exercises...keeping it going for longer than 20 minutes will work your muscles and burn calories and fat.

You could try arm aerobics, or sit ups, or even get a mini trampoline, if you are able to jump. :]

Have you tried pilates? You are on the floor the whole time. They are pretty low impact. However, they do have some moves where you stand on your knees. If they hurt you could just do a different workout. I have teh winsor pilate set. I love it.

This is a hard one if you have a bad knee..the only thing that i know that you could do to "firm up" is to get some little hand weights and use those to help firm your arms up...and you could try nad do a few sit ups every now and then that would help with your chest and your stomach...and for your legs you could try and do a few squats every now and then..as long as it doesn't hurt too much!

i think walking every day for 30 minutes is the best thing to start with.