Get yourself a mini tramp. You can find one for around $30 with a 300 pound limit. They are only 3 feet by 3 feet so you can leave them in a corner when you are done. What I do is get some music on, turn a fan on and point at me and just simply bounce in place for 30 minutes. My feet dont leave the mat, and I do a step in place thing about every 3 minutes when one of my calf muscles start to hurt. You get a very good cardio workout and your legs feel it too. Nothing fancy needed and you dont have to look like an arobics instructor doing it.
