I can't imagine standing still for anything like two hours. I can often only do about 10 minutes before I need to start moving around or my spine will go into spasm.
Peripheral and axial AS diagnosed October 2011 aged 50, more than 15 years after the symptoms started. Also PCOS, GERD/oesophagitis/dysphagia, IBS, asthma,chronic rhinitis. Taking enbrel, methotrexate, folic acid, omeprazole, vitamin D, metformin, steroid inhaler and eating low starch/low GI.