At higher altitudes, the oxygen content is lower, reducing the efficiency of conversion of food to energy in an individual’s body, which can result in relatively limited energy available for growth.
It turns out that the place where you live can affect the shape of your body, especially in growing bones. According to a new study, people in high mountains have relatively shorter arm segments. The study found that men and women living in the highlands have forearms 1.3 cm shorter on average than those of similar groups living in lower altitudes. The study found, however, that the length of the arm and hand almost equaled that of people at low altitude.
The authors said that oxygen levels are lower at higher altitudes, which reduces the efficiency of converting food into energy in an individual’s body, which can result in relatively limited available energy to the body growth. “Our results are very interesting because they show that the human body prefers segments that grow when there is limited energy available for growth, eg, at high altitude, to the detriment of other segments, such as the front end,” said lead author Stephanie Payne of Cambridge University.
“The body can prioritize full hand growth because it’s important for manual dexterity, while arm length is particularly important for strength,” added Payne.
For the study, the researchers looked at more than 250 people from the Himalayan Sherpa populations to determine how height and limited available energy affect the growth of long bones.
The researchers compared their findings with genetically similar Tibetan groups living in the plains of Nepal.
Although this model of limb segment differential growth is interesting, the scientists said they still did not know the biological mechanism that supported them, adding that more research is needed to determine if this is due to temperature could. Blood flow or blood flow. the supply of nutrients.