For most people around the world, physical work takes up a great amount of time and energy every day.
– where women stay in the natal family and men move to live with the wife and her family – is quite rare.– where neither sex leaves home and husband and wife live apart – is very rarely seen.
Women walked on average just over 12,000 steps per day, while men walked just over 9,000 steps. So men also worked hard, but less so than women. They spent more time in leisure or social activities, or just hanging around and resting. When both sexes disperse and no one lives with their natal families, both sexes work hard – but the woman still works harder. According to our study, perfect sex equality in workload only occurs in instances where men disperse and women do not.
From an evolutionary view, giving up rest isn't favorable unless it contributes to higher fitness – such as enhancing offspring survival.
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