Quote (cloudkicker @ Oct 6 2015 10:48am)

You're on the lower end of average but the mean of that range is 675. You're 110 units below. If you look at the mean and find the standard deviation, it is 212.5 units. That is to say 68 percent of a population will be within 212.5 units of 675 either direction. You're well within 1 standard deviation of mean test so I wouldn't worry. Old men and test deficient men will start to hit those second or third standard deviation ranges. You're within the first. Also it should be pointed out that fluctuations within a normal physiological range won't change much other than maybe your libido. This is like that question of the impact test fluctuations due to exercise have on muscle growth. Doesn't really change much until you go out of that range