in general if a man has had a normal psa reading in the past doctors do not tell patients to avoid anything before the next psa test. however if you have had a prior borderline or elevated psa test and want to optimize your chances that the psa is not "artificially" elevated you may want to consider the following: 1. no bike riding for several days. 2. no ejaculation for 48-72 hours but don't abstain too long! 3. no urologic instrumentation such as a urinary catheter or cystoscopy test. 4. no vigorous digital rectal exams or anal sex.
what activities cause the psa to rise?