Knoctor- Dr told me not to ride bike or have any sex prior to PSA test , to standardize test he said . I have had the operation 6 years ago and EBRT to pelvic bed about 2.5 years ago . PSA is in a range now of 0.061- 0.033 or so . Very low background figures . Drs says that is normal cells spitting out low levels of PSA . He says he is not worried about this at all . Im a bit concerned though .