Ladies squeezing balls

Today's TV show featured a segment where these bowling ball sized inflatable balls were used to demonstrate what sorts of exercise workouts can be done using bowling ball sized inflatable balls.

My inner 13 year old kicked in and I took a picture.

Having to be mature (most of the time) is a lot of work.

Ladies squeezing balls.
The key to this workout is
sticking your butt out
while you squeeze.