This doesn't sound far fetched at all. Small injuries are a way to focus the body to enter a recovery phase where the end result is a bone/tissue configuration

This doesn't sound far fetched at all. Small injuries are a way to focus the body to enter a recovery phase where the end result is a bone/tissue configuration that is strong and less likely to be repeat injured. Martial Artists have been practicing this type of body modification for centuries to bones, ligaments, muscles, and minds. I've experienced it through my own personal knee surgeries. And I wouldn't be surprised if in the future we offer body enhancements to healthy indivuals through surgery that will improve performance or long term health.