When you’re doing physical therapy for surgery on a ripped rotator cuff, there’s a toy you can shake. . .?

it’s like a body blade, it vibrates, but it’s maybe 1-2" wide and 12-15" long, appears to be made of high density foam. When you shake it your arm muscles feel alive. . . Does anyone know what this toy is called?

Are you thinking of a body blade?…I believe it is made of a carbon composite…although they come in different lengths, I am most familiar with ones that are at least 36 inches long.

Here’s an example: http://www.bodyblade.com/