Clipping of news on Brazilian Culture, Law and Citizenship
12/23/2014
This article was translated by an automatic translation system, and was therefore not reviewed by people.
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Bone loss, the researchers warn, reaches worrying levels
The sedentary lifestyle has the most fragile human skeleton and susceptible to fractures. 7,000 years ago, the skeleton of hunter-gatherers was as strong as an orangutan. Have the bones of farmers 1,000 years ago, were 20% lighter and weaker than those of ancestors. Revelation is a study published Monday in the journal PNAS.
The loss of bone mass, say researchers, is reached worrying levels, to the extent that people exercise less, is locomovem car spend sitting day and live longer. Osteoporosis is a disease that threaten the longevity, especially females. According to the International Osteoporosis Foundation, one in three women over 50 will have the disease.
An international team of scientists analyzed by high-resolution CT and microtomography the femoral head of hunter-gatherers and farmers, from samples collected in a region where it is today the US state of Illinois. They compared with the structures of modern primates for human bones similar size, such as chimpanzees, gorillas and orangutans. Altogether 59 adult humans and apes 229 were studied.
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Physical inactivity - The most likely cause of bone loss for scientists, is the decline of constant exercise. "Other things could explain the differences among humans, as the amount of grain consumed by farmers in the case corn, as well as possible deficiencies in calcium intake," said Timothy M. Ryan, associate professor of anthropology and information science and technology at Penn, in the United States, co-author of the study. "However, it seems that the biomechanical factor is the main. Physical activity and mobility since the early years is what makes the bones of non-human primates and the strongest hunter-gatherers. "
For scientists, anatomically speaking, there is no reason for a person born today have no bone mass equal to the simian or a hunter-gatherer. Still, it is unlikely that even the most physically active individuals develop as strong as bones of our simian relatives or ancestors.
"We are human, there is no reason not to be strong as an orangutan. If we are not, it is because we are not challenging our bones with sufficient charge, which makes our weakest skeleton and, as we age, suffered fractures that in the past would not suffer, "says Colin Shaw, study co-author and researcher at the University Cambridge, England.
How to prevent osteoporosis
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Treat diseases that threaten the bones
Some diseases are associated with accelerated bone loss. These include hypothyroidism, hyperthyroidism and rheumatic diseases such as rheumatoid arthritis, which affect calcium absorption by bone. "Every disease that affects the hormonal balance favors bone loss," explains Marco Aurélio Neves, orthopedic Hospitals Network St. Camillus de São Paulo.
Sources: Ari Halpern, a rheumatologist at Hospital Israelita Albert Einstein in Sao Paulo; André Luiz de Campos Pessôa, orthopedic coordinator of Caxias Hospital D'Or - Rede D'Or São Luiz, in Rio de Janeiro; Cristiano Zerbini, the International Foundation member rheumatologist Osteoporosis and Bone Health Center Syrian-Lebanese Hospital in Sao Paulo; and Marcus Aurelius Neves, orthopedic Hospitals Network St. Camillus de São Paulo.
Source: Agency Brazil
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This article was translated by an automatic translation system, and was therefore not reviewed by people.