I'm trying to build endurance and cut fat for rock-climbing... so I'll be doing a lot of high-rep-low-weight lifts and a shitton of cardio. What would be a good pre-workout supplement that won't bulk me up, might even help slim me up, wont fuck with my head too much, will energize me? I was using NOXplode back when I was lifting, but doesn't that inflate your muscles? I'm trying to get stronger without getting any bigger... cut, lean, strong, lots of endurance. plz halp from expurt.