From Coach Hand:
One of our coaches had the (mis)fortune of playing lacrosse in college. While he doesn't put *those* gloves on anymore, he has found a use for his dozen or so Brine lacrosse balls... trigger point massage.
Many boxers, due to all the time spent up on the toes, 'bouncing around,' and then pivoting suddenly, etc. are more beat up in the plantar flexors than they realize.
If you ask your average active boxer "do your feet or calves hurt?" the response will likely be "no," but have that person place 60% of their weight on one foot, standing on a lacrosse ball, and roll it around and I bet you'll find some "stuff" going on.
If this is done from heel to toe, slowly, and then the same thing is done along the outer sole and inner sole of the foot, followed by some work on the lateral gastroc either lying on the floor with bodyweight providing pressure on the ball or with the ball against a wall while 'leaning' the gastroc against the ball/wall, good things will happen. We have even had some folks who had 'achy knees' get some relief from this treatment focused on their soles and lateral gastroc.
P.S. - If you do this s-l-o-w-l-y, with a decent amount of weight on the limb you are working, it hurts. Sometimes, badly. Enjoy!