TweetStill feeling great! there is a discernible increase in athletic performance on this stuff. I have not been running due to the old knees aching but I am going for it anyway. I have my ugle Xmas sweater and a santa hat I will run in. My group are all tying bells to our shoes too. The group will be together in the start but some of us are slow and others fast. I am in the lower tier of the top 3rd in speed. But the diff between me and the serious runners in our tribe is 4-5 minutes faster than me. That is not a small margin. these guys can FLY!