""NXDB - I don't know about any fountain of youth. I'm still suffering from a back injury where I was rear ended on the 950 a couple of years back. I will say however, though I haven't been doing it for long, that the rowing machine comes about as close as a fountain as I have found. Especially for riding bikes. With some intesive sets of push ups and sit ups combined with some 2K intervals on the rower, every important muscle group in your body is hit, along with some descent cardio. My back muscles love it.""
Agreed, other than riding, the rowing machine has been the best cross over exercise for me. Last year a huge part of training for Vegas to Reno ironman was the concept rowing machine for me. Good luck this year