article_snippet: Whether it be in the boardroom or on the hunting ground, male competition can cause a sudden spike in testosterone levels.
article_snippet: Researchers claim the human hormone system is particularly well adapted to Researchers lifestyle .
article_snippet: Researchers claim the human hormone system is particularly well adapted to Researchers lifestyle which revolves around small, tight-knit communities that produce Researchers own food. '
article_snippet: Our goal was to look at the interaction between different hormones in motivating behaviour in a naturalistic context,' said Adrian Jaeggi, co-lead author at University of California, Santa Barbara.
article_snippet: Jaeggi said Jaeggi expected to see a trade-off between the two hormones and was surprised to find the positive relationship between the two hormones.
article_snippet: According to Jaeggi and co-lead author Ben Trumble, high testosterone while hunting could be attributed to a 'winner effect' experienced by men making a kill.
article_snippet: Here we observe a potential hormonal analogue consistent with the type of levelling behaviour seen in hunter-gatherer societies.'
article_snippet: Another use for both hormones may have to do with post-hunt recovery.
article_snippet: So the need to be social coincides with the need to regenerate and it would make sense for the same hormones to facilitate both functions.'
highlights_snippet: A day spent hunting for food caused a spike in testosterone level .
  