I do 3 hours of each, generally. When I do CTX, it comes out to 3 hours of weights (each UB 2x's and LL and Power Circuit 1x). With PS, it is 3 hours of each also (each tape 1 x and MIS 1x). S&H is 3 hours of each too, (each S&H tape is 1 hour, plus 3 Cathe cardio tapes that same week). Sometimes, the cardio goes a bit below 3 hours (and by 3 hours I mean three 40-45 min. Cathe tapes including the warm ups and cool downs.) I have done rotations in the past where I did more cardio and found that I lost definition, became more cranky, and more hungry. Curious to see what others do...