Innocent? Or 'puerile joke'? A pissed-off tipster says the latter. "Though she departs Thursday for India and Thailand, she is in constant pain and faces grueling physical therapy... among the exercises: repetitively squeezing a gelatinous ball." [NY Times]
I've heard puerile-er jokes.
I had to do the ball squeezing exercises when I broke my forearm (twice) to regain muscle tone after a total of 8 months in a cast (again, I broke it twice, back to back). It sounds silly to call it a 'grueling' physical exercise, but I'll tell ya: IT HURTS.