PSA, or prostate specific antigen, is a small glyco-protein molecule produced by prostate gland cells. Its function is to liquefy the semen prior to ejaculation. In a healthy prostate the vast majority of the PSA is incorporated into the prostatic fluid which becomes part of the ejaculate. Only a small amount of PSA gets into the blood stream; in fact, most men have a million times the amount of PSA in their prostatic fluid compared to their blood.

All healthy men who still possess their prostate gland will have a small amount of PSA in their bloodstream. Studies of healthy men, with no prostate problems, have shown that there is a tendency for this level to increase naturally, especially after 60 years of age. Furthermore, there are natural small fluctuations in PSA over time which reflect day to day activities. For example: the PSA will rise following ejaculation or if the prostate is irritated or inflamed - activities such as a vigorous bicycle ride can do this

WHAT IS THE PSA TEST?

Statistics show that prostate cancer is the most common form of cancer amongst men - 7% of men will get it (usually around the age of 60), and this figure equates to 27,00 men per year in the United Kingdom. Recovery from treatment for prostate cancer is undoubtably aided by good exercise, of which cycling is considered excellent for its low impact on the joints. Delicacy in the perineal area, however, must be considered when choosing an appropriate saddle.

One way to check for prostate cancer is with a blood test called the PSA test. Men who have prostate cancer may have a higher level of PSA in their blood. However, the PSA level can also be high because of other, less serious causes such as infection. 




www.prostate-research.org.uk