how does it work? why is this helpful?
1730293
It's like those toy cars where you pull it backwards to wind it up. Then a ball inside rotates off balance for about 30 seconds. Didn't like it. Doesn't stay running long enough to do any benefits for me.
1730294
There's a gyro inside that spins and, once you get it up to speed, resists turning its axis. So you whirl your wrist around to spin up the gyro and keep it spinning, and meanwhile the rotation of the gyro is resisting your whirling motion. It's like you have to fight the motion that you're putting into the thing. This resistance gives your forearm muscles a workout.The "auto-start" in this one is a wind-up spring inside that you use to start the gyro spinning (which is necessary because you can't start it just by whirling it with your wrist). Other models have strings you attach and then pull to start them spinning. There's a gyro inside that spins and, once you get it up to speed, resists turning its axis. So you whirl your wrist around to spin up the gyro and keep it spinning, and meanwhile the rotation of the gyro is resisting your whirling motion. It's like you have to fight the motion that you're putting into the thing. This resistance gives your forearm muscles a workout.The "auto-start" in this one is a wind-up spring inside that you use to start the gyro spinning (which is necessary because you can't start it just by whirling it with your wrist). Other models have strings... » Read More There's a gyro inside that spins and, once you get it up to speed, resists turning its axis. So you whirl your wrist around to spin up the gyro and keep it spinning, and meanwhile the rotation of the gyro is resisting your whirling motion. It's like you have to fight the motion that you're putting into the thing. This resistance gives your forearm muscles a workout.The "auto-start" in this one is a wind-up spring inside that you use to start the gyro spinning (which is necessary because you can't start it just by whirling it with your wrist). Other models have strings you attach and then pull to start them spinning. « Show Less
1730295
You just wind it up and then rotate your wrist to keep it going. It is a great workout for the forearms and preventing carpel tunnel. It is a lot better exercise you it looks like it would be.
200333
This question is ridiculous. One should be ashamed of asking this. Yes, it works.
643971
I don't know. Expensive purchase for something I cannot use. What does it do?
1960593
I reviewed this and found several reviews with 5 stars that was not considered helpful. In my review I gave 5 stars, and was considered helpful. I'm not sure where you are going with this question?
62534
Sorry, I cannot answer the question. I bought this for my grandson and have no idea how it works.
1436303
Can you please explain me better, is that I could very well enterderte to help.
364795
I'm not an expert but my gut says yes it probably works better when there are several " things". That isn't necessarily negative.
2068464
If it is a small problem it works well. If it is a bad problem it will take a while. Hope this helps you some.
652495
It keeps a net balance of wins and losses. Works easily and the battery last a long time for us, so it depends on how much you use it. Hope that helps.
1380346
It's just a guide. If you check out some U Tube videos you can see how it works.
1179436
Yes - watch the provided video on the Amazon page; it gives you a much better idea of how it works.
1501156
I only used it once or twice and it worked. Your question makes me wonder though!
1706172
Yeah, it will definitely help. Remember, we have a 100% money back guarantee if you're not happy so try it out...you'll love it!
1090163
I am not the best person to answer this question but I can tell you the thing works. It allows me to breath more easily the method by which it performs this function is beyond me. Allow one more thought, I have been driving since I was 16 and I am now 69 and I still do not understand how the auto actually works however, I do know they both function well!
1471976
it's not a particularly difficult product to use - the problem is that it's not clear if it does anything useful.No clear documentation or research either with the product or on the site to tell you whether using this has any real benefit (as demonstrated by objective experimentation)
1518600
Debbie, bought it last summer, yes it works pretty good. Don't think there are many other options, and it is better than skimming it daily
565697
I do not understand how that works so I am sorry but I cannot answer the question.