I want to get my arms as defined as I can in a month for a special event even if it means slightly overtraining and eating low cal b/c I know it's a temporary thing. I cant do high impact cardio. Would you think it would be okay to alternate full upper body workouts like Muscle Max, Power Hour etc with a day of circuit training like C&W, or something like Janis Saffell's Kickbox Circuit which isnt really too heavy on the resistance?? Too much straight cardio wears on my knee. Thanks.