Revenge Sport, 4.5 lbstar rating 5FBDJanuary 26, 2009I have always had a tough time with cramps when riding, spinning, lifting or any heavy exertion exercise. When I tried revenge sport, it immediately took care of the cramps and I can drink during my exercise now. In fact, when I start feeling a cramp coming on, I take a couple swigs, and within a couple minutes, the cramps are gone. I go through about four, 4.5lb containers a year and I swear by the stuff. Nothing works as fast or as effective for me.