Does he talk about exercising while in pain at all? This has been something that really worked for me after tearing my achilles. After 8 months it still felt irritated 24/7 and I was terrified of re-injury, but ramping up the intensity of my ankle/calf exercises started to make it better. The harder exercises were probably having a minimal impact on strength, but they were having a huge effect on convincing my brain that the area was fine and it could drop its obsession with it.