I'm telling you, it was THE only thing I added to my routine. I went from running barely 10 - 15 minutes to going full at it for 40. Can't quite explain it either.
Last week I biked only, did go hard on it, but I can't believe that THAT would have made me go from a struggler at 10 min to a runner for 40.
Today I did it again, took my creatine, went for 40 minutes, ran 6 miles, no joke. Same supps as I used to take before (BCAA, Yohimbine, Caffeine, Katanadrol), THE only difference between the controlled and the hypothesis group (granted, N=1, Me) was the addition of Creatine.
And mind you, I had not even read this thread when I decided to add it to my workout. It really made me keep going. Today I boosted the speed to 7.4 and it went just fine. I was DRENCHED when I left. I may have walked for perhaps 1 minute, when I was going for my water and to towel myself off.