Can I just add a note of caution re physios advising patients to push themselves too hard? My son, only in his 20s, had surgery to repair his cruciate ligament and cartilage due to sports injuries. He was back at work within a fortnight, when I feel he really should have taken it easy for a few weeks. Four months later and still having regular physio, he started to have a lot of pain and swelling in the knee. His physiotherapist made comments about him not pushing himself enough and needing to exert himself more, and upped his exercise regime. A fortnight later he was admitted to hospital as an emergency with a raging temperature and severe infection in the knee - he had to have the site opened up and flushed out twice in the first 24 hours, and ended up in hospital on intravenous antibiotics for 6 weeks. I don't want to be the voice of doom here, but please be careful everyone.