I really like rowing regularly on a Concept 2 machine. It's my favorite exercise. - uses a lot of the body, upper and lower - low impact, doesn't aggravate an

I really like rowing regularly on a Concept 2 machine. It's my favorite exercise. - uses a lot of the body, upper and lower - low impact, doesn't aggravate any of my injuries (eg knee) - not weather dependent (running track gets icy in winter around here) - high tech, you can race others over the web - good online community - accessible (for me, they have several machines at the gym)