How much juice are yu drinking every day? Are you using supplements at all?
The mudder things looks like it can be both a challenge and fun but in either case one would hafta be in decent shape and to be on the wining side prolly train a good bit. I am white water canoeist and if the weather is good and we have good water levels I hope to spend at least 4 days canoe tripping on one of the prettiest and most secluded whitewater rivers in No Ga about a month after I finish my 90 days.