A man’s chronological age is actually a poor indicator of the status of his biological clock. Some (admittedly rather rare) 80-year-old men have sexual and reproductive parameters similar to men fifty years their junior.
By the same token, some 30-year-olds, though they appear fit and healthy, have biological clocks that have been ticking along furiously and have reached a stage more typically seen in men in their 70s.
How can a man tell where his biological clock stands? Fortunately, it’s relatively simple.
When I say “male biological clock” what I’m talking about is the health status of four key physical factors:
The “time” shown on a man’s particular biological clock is a function of how much semen he ejaculates, how many and how healthy his sperm is, his level of testosterone, and the quality and reliability of his erections.
Men scoring high on these measures are biologically young regardless of their age, though, some degradation in the genetic quality of sperm is unavoidable. Many ways exist to improve the four key parameters of sexual health and, thus, rewind (to a certain extent anyway) the male biological clock in men who score low in any of these areas.
More on the Male Biological Clock: