I tried to do that. I rode really hard for about 2 hours. Then I went to work (I throw freight) and let me tell you yessireeebob that after the 10th 70lb bag, I was starting to see stars. I went and had to eat something -I was going to pass out. That helped for about 15 minutes. Then my mind went asunder. Boy was I dust. If you're gonna do it, don't gung-ho it like me. Do a little at a time, and increase day by day. Oh, that day was hard. I should not try to be like a man sometimes, huh?