
Grab a tennis ball (or a rolled-up sock) in your hand.
Clench your hand into a fist wrapping the ball (or sock).
Squeeze the ball (or sock).
Hold for a count of 6 seconds, then relax.
Aim for at least 8 to 12 reps.
Switch hands and repeat steps 1 through 4 with your other hand, doing at least 8 to 12 reps.