Mr. Canuck is right. I would suggest you to go for isometric exercises for quadriceps, hamstrings, gluteals and abductors and find a good physio asap. And its hard to believe for me that a person 76 yr old doesn't have any osteoporosis. You should also try hot water formentation with a hot water rubber bag etc. I advice you not to do any massage without knowledge of cause of pain, coz massage hv disadvantages too. I wish a quick and happy recovery for your father. take care.