Regarding the bike riding. I have not seen or been told any research that cites bike riding leading to or causing prostrate cancer. What research shows is that bike riding can irritate the prostrate and cause a rise in PSA levels. I also was told vigorus sex could do same but at 77 don't worry about the latter. I am an avid bike rider doing 25 mile rides and my PCP wants me to not bike ride at least 72 hours prior to PSA testing.

I have an excellent PCP that does enormous research on prostrace cancer, treatments, studies, and is always telling me about new research and studies. He said recently said new research to determine if the Space/Oar does contribute enough to reducing radiation damage to rectum to justify it and research on drinking water to move bladder away from prostrate and reduce radiation beams is justified.

I think I would do those procedures (and I did both) if any level of reduction of radiation damage to other organs and tissues. But he says some patients do not proceed with treatments worry about the procedure for Space/Oar and having to drink large amounts of water and of course holding it through treatments.

I can't praise my PCP (Mayo Jacksonville) for his caring and detailed treatments for me. Wish they were all like him. Calls me at home many times to go over tests and discuss issues.