Re: rowing exersize
15-20 minutes, man I don't think I'd be down for that. 5 minutes is enough, then lets start actually working for underhooks for another 5 minutes. It is an important skill, and very good to practice. But my classes are an hour and a half long. I wouldn't want to waste 20 minutes of my time doing an exercise I can do at home. I'd rather have my technique critiqued, or spar.