I work at a desk and do not get much outdoor exercise . I be also a germaphobe which make do anything like push up mentally challenging . so I have be look for a alternative to keep my upper body in shape . when I first see this on tv , the concept they explain make perfect sense to I , with my limited knowledge in science and the human body so I go and pick one up . the result have be exactly as expect . it be not a body builder work out , but for keep the average Joe in shape , it work just fine , as long as you understand that it be mean ONLY for the upper body . it be ideal to use this in addition to a lower body work out like jogging and stretch . a word of warning , if you be very out of shape , this thing will break you in under 6 minute . if you already engage in sport or manual labor , then this should not be much challenge . if you have a desk job and be not involve in any athletic activity , then do not expect to be able to do the full 6 minute work out at first . you 'll eventually get it though . as other have state , it will not make you a body builder , but it will get you in to shape if you actually follow the routine .