Well, actually its something that i've been doing at least once or twice a week, but its not due to insomnia though, my sleeping is ok, and sometimes i do sleep too much. The workout actually burns me up to a point that when i go to sleep, i switch off like high school boy. So basically i workout on weekends only (mostly). Its something proven (by me ofcourse), and yes, you should try it, then come and give some thoughts on it....