Ergometer!

Rowing is the best of all worlds! Best form of cardio ever. Get trim, do your cardio and build muscle at the same time.
Plus, depending on the Erg, they're cheap. Used machines are easy to find for about $100 too (Concept II).
Fluid Ergs give better resistance than air, but can be expensive:


Rowing is the best of all worlds! Best form of cardio ever. Get trim, do your cardio and build muscle at the same time.
Plus, depending on the Erg, they're cheap. Used machines are easy to find for about $100 too (Concept II).
Fluid Ergs give better resistance than air, but can be expensive:










Most professionals will sustain 400 watts for an hour or so. In re: rowing: I like it. I wouldn't say it'll build a lot of muscle, but it's a good form of cardio if your 500m times are 2:00 or under.