Out snow shoeing and snow camping again this weekend, this time with three younger guys in their 30's. One I've done a few trips with, summer and winter. He called me a tank, I just keep rolling along, not pokey, just after climbing straight up a steep hill or two on shoes, it takes it out of you. However, they were the first ones to bed that night, I stayed up and read and wasn't even sore the next day.