Hi...I know, I know...I'm not a teen. I just came across this board and wanted to give you some advice on this. I have never done Tai Bo, but have you ever heard of The Firm? They are really hard workouts to do....they kick your butt, but they work SOOOO well. You definately will see results after a few workouts. The secret is a combination of cardio and strength training at the same time. I used this tape to lose 60 lbs after my first child. Just recently, I joined a gym and I would be there... on all that expensive equipment....watching the personal trainers showing people how to do excercises that I USED to do with The Firm tapes. Try it out...you won't be able to do the whole workout the first time.