Has anyone here heard of "The 4 Minute Workout"? I stopped in and checked this out and the workout is a combination of strength and cardio performed for 4 minutes at high intensity and repetition, alternating upper and lower body every other day. I definately felt the effects of the weight and the cardio but can 4 minutes a day actually produce any results? If you have heard of this or know someone who has done it, please share the results. Thanks.