Be aware that certain activities CAN give a false reading of a PSA test and you may not -- probably were not told about this.

Hope this helps you Gentlemen.

https://www.google.com.au/search?q=can+bike+riding+can+give+false+reading+of+psa+australia&ie=utf-8&oe=utf-8&channel=fs&gws_rd=cr,ssl&ei=7f9jWcPGJMf-8QWH8JzIBQ