when I am training (injured now)...and am doing Cathe's workouts...I generally get my best results by doing her full body workouts (Hi reps. Muscle Max, Muscle End., STS full body,) 3x per week faithfully and only 2x per week if time is tight. I find that is good for my legs...and then I do cardio on the other days that also work the legs...I was very happy with this schedule.