A lot of people when asked what their blood pressure is similar to, they are able to recite the responses of the very last test they'd at their doctor's office. But in case you asked them what's their level of testosterone, most wouldn't even know how to get it checked or the benefits of it being checked on a regular basis. Basically, unless you are a new man with less than 10 % body fat and also a healthy muscle mass and typical sports within your life, then you are like the remainder of western men who are too fat, far too sedentary and have lost most of the muscle mass they had as younger men. Certainly age is not part of the equation - older men with extremely active lives do so since they have high levels of testosterone in their blood. And they have very high levels of testosterone in the blood of theirs because they have continued to live extremely active lives.  
For instance, my father was usually a healthy and active man mainly since the business of his over the years largely involved manual toiling and heavy lifting. As a result he always maintained high levels of muscle mass, very little body fat and he was at all times active in life. If he had the testosterone levels of his checked, then it would almost certainly be found that he's a testosterone level in the higher end of the normal range. The point is that testosterone levels and exercise, muscle mass and fat volumes are 2 aspect of exactly the same coin, which means that one can be said of the other. High amounts of action, See this site (https://www.santacruzsentinel.com/2023/12/13/best-testosterone-booster-supplements-for-erectile-dysfunction-reviewed) movement lead to excessive levels of hormones in the blood, and high levels of hormones in a person's method brings them to become highly active as well as driven in life that naturally results in lower body weight plus more muscle mass.