Due to my schedule I generally work out in the evenings from 7 to 8 or 9. I cant take stims that late or I dont sleep at all. I am looking for a suppement or stack of supplmenets that would provide a 2 to 4 hour energy boost but wear off in time for a good night sleep. Any suggestions? I read about alcar, sibutramine etc would appreciate any thoughts. Perhaps there are others of you that work out late and have the magic answer.