Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: Isn't the movement of the weights expected to be smooth? Not a rubbing sound?
Document: If you want to look buffed like the guys in the infomercials from using shake weight, unlikely. To gain muscle mass, you need wide range of body movement with heaier weights. Shake weight is good for burning off the energy that is left in your arms. But if used with weight training, cardio, and good diet, you will feel the difference.
when you look at the video it looks like the shake weight is doing the rebounding and you are just holding it but its not you are doing all of the up and down movement if you stop moving it stops
I used the shake weight for about 15 mins and i saw that it actually worked, the only reason that i rated 4/5 stars was because in the commercials nor in the description mentioned that it was not battery powered. They have to be specific about things like this. But this product does work, you just have to do the movement. Also don't watch the dvd, just look at the popular shake weight exercises and you'll get it.
It seems from what I've read so far, for many people this product produces some sort of positive results and I won't dispute that. But for the others who wrote the bad reviews their words should not be taken so lightly or even callously berated. The tv ad IS misleading. I don't think anyone expected the weight to shake on its own, "doing the workout for you" as many critical commenters have claimed.
THey think they're super awesome. For some reason, only the top half of my pecs have really shown improvement, so I only look buff in the upper 30% of my body. South Park kind of sets a false expectation, and I expected there to be some actual cab change to fall out of the bottom of the Shake Weight, but no luck. I also suggest dieting heavily to see the best results with this product. If not, they are almost non existent.
I work at a desk and don't get much outdoor exercise. I am also a Germaphobe which makes doing anything like push ups mentally challenging. So I have been looking for an alternative to keep my upper body in shape. When I first saw this on TV, the concept they explained made perfect sense to me, with my limited knowledge in science and the human body so I went and picked one up.The results have been exactly as expected.
However, after using it more and more, I found out that the more you shake it, the easier it gets to use. And, you can tell if you're using it right if it makes a loud noise(surprise, surprise, a shaking sound).Overall, if you want a fast, effective way of working out without gym time, this is a decent alternative.
Don't even waste your time with this nonsense. Just buy regular weights and do as many reps as you can.
This product is not all its cracked up to be. I don't feel it gives you the vigorous workout that it claims. I prefer free weights much better.
Grant it they do not lift weights like I have for many years, but these people were struggling and not completing the reps properly. If you want tone and better vascular development, then this is ideal for you!! !
Answer: yes