I have some neck and back issue . I find this weight easy to use . you can shake it at you speed , fast or slow . build muscle back up . the 30 min video have a decent range of motion and will help stretch you out . it do make you sweat and a couple of the movement on the 30 min video be harder to do . it will teach you some balance and coordination as you use it , because you shake and move at the same time . you do not just sit and shake it LOL . to be effective ... it have a 6 min upper body video and a 30 min video that be for total body movement . it combine shake weight move with traditional move . alternate 6 min easy daily video with 30 min -lrb- 3 time a week -rrb- and a walking or other activity routine would be optimal . you should also watch what you eat . shake a weight will not help you reach you goal alone . but I feel this be worth the money . I have see they range btwn 15 and 20 buck . they also have one be various color now . it be a useful and relatively easy tool to have for re-strengthing yourself and get off the couch .