What do you do when you want to work out but need a break from your usual cardio? Indoor rowing is an excellent alternative. If you're into power training, rowing is for you. This article covers the basics of starting to row.
Truly, the only indoor rowing machine worth using is the Concept 2 Rowing Ergometer ("erg" for short). Yes, other rowing machines exist, but no one who rows takes them seriously. The Concept 2 is the gold standard. The current models are the D and the E (slightly higher off the floor). The longest-standing model is the C, which was the one-and-only for many, many years. (I have one, love it, and wouldn't trade it for a D for anything!)