not a full workout on its own , but this be a fun , quick addition to a exist routine . the dvd routine it come with only take about 5 minute to do , which mean even a couch potato can run through it several time a day , during a commercial break , while wait for that big file to download , or the coffee to finish brewing . the quick workout also mean there be no excuse . even if you be run a bit late in the morning ... what be 5 minute more ? Forgot , and it be bedtime ? so what ? it 'll only take 5 minute . I keep mine at hand at make a point of use it in spare moment . it have the disadvantage of only come in the one weight , but there be a little compensation in that the intensity of the exercise be affect by the rate at which you shake it . a gentle shake provide a gentle workout , and more vigorous shake give a little tougher workout . not for those look for a real workout , but well worth it for a little boost to a exist workout , or for woman look for a little extra toning .