Actually that is not true. Producing microfractures to the shin bone makes it create an even stronger bone surface when recovering. So a tad of good rest and calcium nutrition would do much good.
Originally Posted by Lane
Wolff's Law is a scientific theory that explains the process of bone adaptation. Just as muscles grow stronger as a result of the restoration of micro-tears in muscle fibres caused by exercise, so too do bones become denser when they repair after a break. When a bone breaks, the body essentially repairs it by filling the break with calcium, which turns into bone. Muay Thai fighters do not break their bones, though. Instead, they cause micro-fractures that fill with calcium and become denser and stronger over time.