fri/sat all day sessions, leaving in the am and returning before dusk has left me a little sore right now! i don't think there is a better full body exercise that comes with such rewards as xc skiing! (besides mtb'ing that is!)
not me in there...wish i could tele half as good as some of the guys i skied with so far this year, but im keepin at it and havin too much fun in the process