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PSA test after bike riding

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Posted 5/8/2016 5:42 PM (GMT 0)
It’s widely reported that certain activities right before a PSA test can raise the level of PSA in the blood. Ejaculation, DRE, and bike riding are mentioned often. It is recommended to wait 48 hours after ejaculation before the PSA test. A biopsy might take 6-8 weeks to recover. My question is about the bike riding. We are going to the beach in late June for a week and plan to do some casual bike riding. By casual I mean 5-10 miles at a time at a leisurely pace. Two weeks after I return I will have my PSA test. What, if any, effect might this bike riding have on my test?

Two weeks before the PSA test I abstain from sex, reduce my caffeine intake, and start drinking more water than usual. I'd like to participate in the beach bike riding with the family but not if there is a chance in hell it will effect my PSA.
Posted 5/8/2016 7:36 PM (GMT 0)
I doubt there will ever be a true, randomized controlled trial, that will answer your question.

Here is the conclusion from one study that actually found an increase, 5 minutes post cycling! I think 2 weeks is very safe.
Cycling causes an average 9.5% increase in tPSA, in healthy male cyclists ≥50 years old, when measured within 5 minutes post cycling. We considered the increase clinically significant as the number of participants with an elevated PSA, according to established cut-offs, increased post-ride. Based on the research published to date, the authors suggest a 24–48 hour period of abstinence from cycling and ejaculation before a PSA test, to avoid spurious results.

www.ncbi.nlm.nih.gov/pmc/articles/PMC3572135/
Posted 5/8/2016 8:28 PM (GMT 0)
2 weeks! Not a chance. 2 days, maybe, and even that is equivocal.
Posted 5/8/2016 8:58 PM (GMT 0)
I am trying to wrap my head around this.
You ride a bike for up to 10 miles!
Like all in one day?
Amazing.

Impressive, but won't affect you PSA after 2 weeks.

Andrew
Posted 5/9/2016 1:45 PM (GMT 0)
I would think you'd be fine, but talk to your doctor.
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