This one may be fairly obvious, but it's a great way to get cardio in. You can do it on a stationary bike or get out into the elements with

a traditional bike. Either way, you'll be blasting calories and getting in a great workout.

Not only is this great as a low impact cardio workout, it's great to do even without an injury. It hits every major part of the body so

that you get a total body cardio workout and give your muscles some extra resistance.

If your legs are out of commission completely (we're talkin' a cast or two), then you might want to try upper body cardio. It will keep your legs out of

the equation completely so that you can focus on getting your heart rate up without hurting yourself.

If you need to rush through some cardio, then you might as well make it as effective as possible. HIIT is a great way to blast some calories fast. Since you're working

out for a shorter period, there's less of chance you'll hurt yourself further.

If this is your first time trying a high intensity workout, then you might want to start things off slow. This version will take it slightly easier on you so that

you have a chance to work up to the harder versions.