I spent the better part of 10 years sitting on a rowing machine (2 - 3 hours a day) all winter waiting for the ice to thaw (PR of 6:02 for 2k…I’m a small heavyweight rower at 6’1" and 190-200 lbs). As has been mentioned, rowing with proper form is essential to avoid back injuries. . If you got to
http://www.concept2.com/default.asp?flash=show
and watch the flash intro it shows a pretty good example of proper technique.
As for how it relates to tri training, I think you’ll find that it will help to develop power on the bike. Without a doubt it will give you a serious aerobic workout, which will be associated with an enormous amount of lactate burn in the legs and glutes if you go really hard. 2k in rowing is far and away the most painful racing I’ve ever done, and that includes xc skiing, running, and triathlons (from sprint up to ironman distance).
However, the stroke rate is much slower in rowing than the tri sports…and I’ve read some research stating that the muscular fitness in rowing does not translate all that well to running(in particular). I don’t know that article off the top of my head, but I could find it for you if you are interested.
I tried to race competitively in both rowing and triathlon one summer…and ended up performing pretty poorly (for me) at both. I guess I was a quadathlete that year. Having said that, i think mixing bike and rowing intervals in a workout would work really well, and I know a number of successful rowers who mix the bike in with the erg in the off season.
case in point:
http://www.fairplay.eu.com/magazine/issue11/article1.htm
The bike is certainly my strength in triathlons, and I know a number of former rowers turned triathlete’s who are the same way.
Weight most certainly helps in rowing, especially on the erg, which is why larger athletes generally have faster times in rowing. Most Olympic heavyweight oarsman are 6’3"+, and 210+. But I think what imsquared is alluding to is that an inefficient 200 pound rower will get his ass handed to him by an efficient 155 pounder on the water…even if the 200 pounder is faster on the erg. Water doesn’t care how strong you are if you are inefficient, as any swimmer will tell you.
Erg is just short for the rowing ergometer…as in “I’m going to erg for an hour”. Most rowers spend their long distance workouts (60-120 minutes) rowing between 18 and 22 (24 max) strokes per minute, working on power and form. Once you get to 26 strokes per minute and above it generally becomes more and more AT and Max VO2 work, since you are still trying to pull hard, just at a higher rating.
If you’d like to discusss more you can IM me at scull2k on AOL IM.