Any heavy exercisers out there ever tried creatine? I tried it once, about 6-7 months ago and it was amazing! Didn't need to use it again. Then I suffered a relapse and had to put working out on hold for a month or two. Started weights again but it looks like I might take the creatine route once more - running out of energy halfway through the workout! I can do cardio for ages, I swim for 40 minutes every day, but not the weights! Anyone here know any alternatives; any other way to boost energy during a workout?