the ball vibrates? or moves in and out?
1261529
More of an in and out motion And got deep into the muscle I miss it, wish it was still working
620744
I have two of these and there is a bit of play in the button. My guess is that the internal mechanism is all plastic and there is some looseness in the tolerances. However that rattle... not so much normal.
2159321
It does not rock back and forth. It is more of a bounce as it moves forward.
372451
It goes up and down. If you are interested in vibrations, look up ultrasound handheld devices. Good luck
1296612
It sounds as though your ball is not seated properly or the connection is not tight enough. I have had this model for nearly a year with no stability issue at all. My husband has used the same type for nearly three years and his is still very stable. Mine did come loose one time and I had trouble getting back on securely. Once I got it to 'snap' in place it has remained tight and moves only when I move it myself. If this is a new purchase I would suggest contacting the seller for replacement.
2202719
Yes, but it flutters slightly. Hasn't gone out on me unless there is re circulation somehow (off a table or hard object)
1579654
No. This ball it does not bounce. If I drop it, stays there. Definitely is just to squeeze in your hands. I exercise my hands when I am watching TV.
1639607
yes....you have to get it back on track..my issue was the ball getting stuck midway on the track
2068157
The Ball is pretty versatile. On an indoor court/gym floor you'll notice it will have a bit of an extra bounce (thanks to a slightly thicker exterior) but not much of a difference.
1726651
It is supposed to move for stability with the surface. That is the way it worksPhillips
997872
There are 3 intensities. I would not call them speeds. And I'm no completely sure if it vibrates or rotates, but all my friends say it looks like its vibrating.
256604
You can adjust the speed and frequency of the balls firing out. But when you set it up it doesn´t change itself during the play. Also the direction is still the same at this model.
257234
Since the bottom has a rubber like material on the bottom, it does not move. Hope this helps.
1670556
There is a ceramic ball inside that spins under pressure. the pattern is circular regardless of nozzle position.
1666804
It does bounce, I don't know how well it would work for basketball but soccer would work.
1632650
As I recall - and it's been awhile since I purchased it - the ball was partially/mostly inflated. I'm virtually certain it wasn't flat. You'll need to pump in some air from time to time to keep it up to snuff.
303286
It travels up and down freely on a spiral section of the center pole. It is just a loop that goes around that section, it is not locked onto the pole in any way- yet we have never had the ball come off the pole no matter the hit because of design, it would just spin at the top of the pole!