Loggers more men than football

Woodman are far more masculine than the players, and now scientists have figured out why this is happening. It turns out men, chopping trees, higher levels of testosterone in the blood.

Testosterone

Anthropologists Ben Trumble and Michael gurv University of California studied a group of natives clicker forests in Bolivia. They found that tasks requiring considerable physical activity related to farming or logging increases Testosterone   in men. And lumberjacks he is 15% higher than their peers, dealing with competitive sports, such as football.

Thus, when regular games of football Testosterone   a man climbed to 30, 1% compared to the average, while felling - by 46, 8%. According to Dr. Tremblay, the indicator hormone is closely related to the availability of energy that man gets from food. Even if it misses just one meal, the testosterone level falls down to 10%. If a man fast 2 days, then the level of hormone in his body such as eunuchs.

Infections due to pathogens, parasites and even attack various kinds of injury such as burns and surgical operations, also reduce testosterone levels. The male uses the energy from the food, to be built on the basis of its muscle mass and maintain a healthy immune system. When this energy is not enough, the body chooses between muscle and immunity.

Today, we can go to the confectioner's shop and get 20,000 calories in 10 minutes, but the woodcutters from Bolivia need to spend much more energy to produce the necessary calories. (READ MORE)

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