I'm starting to think this injury is more mental than physical. Has he lost the passion to compete? Four months without competing and now people doubting him for the AO already when it's 60 odd days away, that would only be the case if it's a chronic problem, a broken bone or damaged ligaments.
An injury is always psychological as well.
Would you run until your muscles tear? The brain sends signals informing the muscles to stop. You couldn't, even if you wanted to.
It takes a long mental as well as physical recovery period.