first , to be clear , this be not a replacement for a normal total body workout . this will not replace weight or body weight exercise . it be , however , a essential piece of equipment for anyone who be serious about fitness . I be not kid , read on . first , let I qualify myself . I be 23 , 6 ' 2 '' , 190lb , ~ 10 % body fat . I work out a fair amount because I enjoy it . I have be a body weight guy my whole life : pullup , pushup , situp , and run . in the last two year I have incorporate a olympic routine once a week for my lower body and a basic upper body weight routine once a week . normally , at the end of either a pushup\/pullup routine or a upper body weight routine I do what be call `` flutter '' -lrb- google it -rrb- to really make sure that my muscle be throughly fry . normally , this would consist of do a lot of minus pushup or pullup -lrb- ~ 1 '' range of motion -rrb- , maybe 100 reps. here be where the shake weight come in . I still do my flutter but now I add a four minute session with the shake weight . I do one minute on each arm , one minute in front of my chest , and one minute above my head -lrb- watch the video on youtube to see what I be talk about -rrb- . by the end I be totally fry . I have be use it for about a week now so I can not say anything definitive about result but I be sure it will help I progress . in summary , the Shake Weight be a excellent supplemental tool for anyone who be serious about fitness .