I've used these before but just to try them out. For fun, crank up the power and put them on your knuckles.However do these things actually burn calories and how effective are they at strengthening muscles?
no one knows?
I consider that a toy.
>>58531Products like this are shit, never buy them.
>For fun, crank up the power and put them on your testicles.Fix'd
Could have use with a tension.
>>58601balls don't have much muscle around them, not as painful as you'd think
I think there are cases where people's stomachs were burned by these things.
not sure if they really work, but are certainly a lot of fun to mess with