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If we exercise, we grow muscle.
If we eat too much, we get fat.
If we use up our testosterone levels, then our body knows to produce more at a new higher level to sustain us with the more active life.
If we sit around and do nothing to exercise our body our system will adapt to maintain the lower level of testosterone needed.
This is why fat people have low sex drive and why fit and active people are much more vigorous and demanding in bed sexually.
If we use testosterone, we make more and in particular, if we do intense weights exercise that makes our muscles burn the effect is to make our brain set an increased percentage of the testosterone in our blood to be free testosterone.
In fact 96% - 98% of the testosterone in our blood is not at all free to be used to cope with our body's needs.
It is mostly sitting on the shelf in storage until needed to deal with stress - stress meaning exercise.
When we cause some muscle burn, that burning tells the body we need more testosterone to be available, and so it is set free or released from the protein bindings that keep it in storage.
Testosterone is made by the testes breaking down cholesterol into various stages of hormones, eventually being broken down into the testosterone.
So it makes sense that we cannot hope to have higher testosterone levels if we have a cholesterol free diet - meat and eggs are good muscle food.
They are also good brain foods too as the brain is a large consumer of cholesterol.
Indeed there is a strong connection between our focus and attention span and our testosterone level.
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