In the midst of the profound changes that humanity has witnessed, it's no wonder we're not noticing an increase in the number of sexy, formidable men – tall, broad-shouldered men who lack self-confidence. yeah.
But over the past 100 years, men around the world have grown in height and weight twice as fast as women, making the gap between the sexes even wider, according to a new study.
Professor Lewis Halsey, from the University of Roehampton, said: 'We understand how sexual selection has shaped the bodies of men and women, and how improvements in our environment, such as diet and a reduced burden of disease, can free us from bondage. “We are beginning to gain insight into whether or not they were released.” .
Halsey and colleagues used data from the World Health Organization, overseas authorities and British records to examine how height and weight change depending on living conditions. The latter was measured by the Human Development Index (HDI). The HDI is a score based on life expectancy, years of education, and per capita income ranging from 0 to 1.
An analysis of records from dozens of countries found that for every 0.2 point increase in the HDI, women gained an average of 1.7 cm in height and 2.7 kg in weight, while men gained 4 cm in height and 6.5 kg in weight. It turns out. This suggests that when living conditions improve, both height and weight increase, but men do so more than twice as fast as women.
To see if similar trends were observed in other countries, researchers looked closely at historical height records in the UK, where the HDI rose from 0.8 in 1900 to 0.94 in 2022. During the first half of this century, the average height of women increased by 1.9%, from 159 cm to 162 cm. , Meanwhile, the average height of men increased by 4% from 170cm to 177cm.
“To put this into perspective, about one in four women born in 1905 was taller than the average man born in 1905, compared to about one in eight women born in 1958. ,” Halsey said.
Writing in progress biology letters In a study titled “The Sexy and Scary Male Body: Male Height and Weight Are Condition-Dependent, Sexually Selected Traits,” scientists found that women's sexual preferences They speculate that this may have encouraged the desire for taller, more muscular men. Being obese and heavy doesn't necessarily mean being muscular.
While height and size are key indicators of health and vitality, sexual selection also favors males who are better able to guard and protect their partners and offspring from others, Halsey said.
“Women are attracted to a man's height because it potentially makes him more formidable, but also because being tall suggests that he is physically fit,” Halsey says. he says. “As they grow, they are able to grow and reach their full potential without the slings and arrows of a hostile environment. That's a sign that they are well-built.”
This finding builds on previous research that found: Women want tall men more than men want short women.. However, there are disadvantages to being tall. Taller people tend to have higher incomes, but they also tend to be more susceptible to various cancers. This is probably because there are more cells that can accumulate mutations that lead to disease.
Michael Wilson, a professor of ecology, evolution and behavior at the University of Minnesota, said the men's rapid increase in height and weight was “remarkable.” She said this is consistent with the long-held idea that women are the “more ecologically constrained” sex due to reproductive demands, especially in mammals where pregnancy and lactation are “energetically costly.” Ta.
“Investment in body size expansion by males appears to be sensitive to nutritional status,” he says. “When men grow up eating energy-dense foods, they grow much larger than women.
