@kuhrin86 Has he tried a rehabilitation physical therapist? That is a specialist (usually with a PhD in PT or Rehabilitation) who can study and analyze his gait, posture, movement, the relationship of the new hip to back, other hip and knees. This often uncovers inequality in muscle strength or balance which can then be addressed. You find this type of PT through a rehab center or orthopedic or trauma hospital. This should be covered due to the work injury.

The therapist designs a very specific program to address the area of concern, no "cookie cutter" set of exercises. Techniques they use include gait and strength training, stretching, massage, acupuncture, aqua therapy, myofascial release, and maybe heat, electro-stim or infrared therapy. After my 5th hip replacement/revision (long story) I required this type of PT to relieve back and knee pain and regain full strength. I used it again to treat chronic pain caused by progressive arthritis and rotator cuff injury/rehab.