my boyfriend and I have be talk about get the shake weight ... well we do . he get I the women -lrb- they do not have man 's in stock at Walmart -rrb- . I use it lastnigth more as a joke and like it . I actually use it for 8 minute today . I do one minute on each arm then 6 hold it with two hand ... I find I have to alternate hand and I feel the burn . muscle I do not know I have , lol . after read review I be go to keep it up and watch how I use it so I do not have any pain in my already bad back ... but versus lift weight and even push up I feel all my muscle . so after day one love it ... but will continue and hope I be one of those user that continue to love it and see result . I need to add I just pick it up and use it ... way easier then get all my work out equipment out just talk to my four year old and before I know it I be do ... boy be I count down .