I had to get a blood pressure cuff for my new PT back exercises.
They have me put it under the small of my back when I lay down, then I have to do various inverted marches and other leg things without making the needle on the gauge move.
That's a whole lot harder than it sounds and really works the lower abs.
Combined with my "I don't even know how many" squats in various configurations with resistance bands make for a pretty good core workout.
Now, if it only would only hurt less.
