I'm looking for something to give me that extra "boost" during my BJJ class, and sparring sessions. I've tried Jacked, but it seems to give me more strength, but it zaps my stamina. Does anyone know of something I could take that will give me the best of both worlds? As in, gives me strength, and keeps my endurance going? I don't lift much, so I don't really need anything that will make my veins pop out or whatever. I just do cardio, and regular endurance/strength training. Also, I'm trying to cut weight, so I'm not looking for anything that will make me gain any weight. I'm currently taking M-Drive, and Oxy Elite Pro. Any help would be great.