I'm thinking of buying one of the Walk Away the Pounds tapes. I'm 14 in a month or so, and I'm fairly active and quite fit. I'm looking for something quite challenging. The only place I will be able to do this tape will be in my room at my Dad's house, and in my brother's large room, which is where I do most of my exercise and has been branded my "workout room!". Which tape do you reccomend? Also, do any of them come in VHS? It's okay if they don't, as I have a DVD player in my brothers room, but it would help if they did becuase I don't at my Dad's. Thanks in advance!