Maybe they have the world's best bone stimulator on hand. Actually, you want to put weight on the area as soon as possible to help facilitate repair. Weight-bearing exercises are good for increasing bone mass. If he can endure the pain of walking on the injured area, then it is likely a plus going forward. The induced micro-motion of the bone stimulator and weight-bearing exercise should theoretically increase the chances of an enhanced healing response. How much? We should have the answer before too long.