I die laugh the first time I see this advertise on television . after read the review I have to give it a try . I be a personal trainer and have do weight training for year . because of that , I order the man 's version of the Shake Weight . who would have think that a little 5 pound weight could be any kind of a challenge ! though this will not be my primary source of weight training , it will certainly become a part of my routine . it be always good to keep you muscle guess and this be definitely a fun way to `` shake '' it up a bit . of course , I will not use it where anyone can see I !