i went to GNC and bought this drink http://www.bevnet.com/reviews/activate/Energy_Lemon_Lime this drink pushed me way past my normal limits with energy to spare. i can normally only run for about 20 minutes and then i get mad tired and start sucking wind todays workout 50 minutes on tredmill = 650 calories 10 minutes stair stepper = 125 calories 10 minutes bike = 150 calories 50 situps, 20 curls 30 lbs, and a few reps on those misc. machines i love that activate drink, if it wasnt for that i would have quit after the tredmill reminder, im a x-country runner not a weight lifter for those who dont already know me. i did nothing else special. if your looking to get in shape id suggest that drink.