Education: Beyond the scales, fitness and the key to health of body fat ;
The bathroom scale can show a good number, but the amount of that weight is fat, not muscle? New studies add to the evidence that the scale does not always tell the whole story when it comes to health risks related to weight.
Hold body fat low is more important for healthy aging that a low overall weight, researchers reported Monday in the journal Annals of Internal Medicine . Another study found that young people who are not physically fit are at greater risk of developing type 2 diabetes later in life, even if your weight is healthy.
Here are some things you should know:
IS NOT IMPORTANT IMC?
Yes. Body mass index, or BMI, is a measure of a person’s weight compared to their height. For many people, that’s a lot of evidence to say whether they are overweight or obese and therefore at greater risk of heart disease, diabetes and premature death. Generally, a BMI of 25 and above indicates overweight, while 30 and above indicates obesity. Someone who is 5 feet, 9 inches obesity hit that threshold to 203 pounds.
but it is not a perfect measure
Some people have a high BMI because they are more muscular. More common are people who harbor very little muscle and excess body fat, even if your BMI is in the normal range.
changes in body composition with age, with the proportion of muscle decreases and the proportion of body fat increasing. It slows the metabolism, so it is easier to put on pounds in middle age, even if people have not changed the way they eat and how much exercise.
Dr. William Leslie, University of Manitoba wondered if the measured body fat could hardly help explain the controversial “obesity paradox”, where some studies have suggested that being moderately overweight later in life can be good for survival. He tracked 50,000 Canadians aged and elderly, mostly women, who had undergone screening for osteoporosis weakens bones. Those X-ray detection DXA known as X-ray absorptiometry for measuring bone dual energy and also allow an estimate of the fat.
A higher percentage of body fat, regardless of body mass index of the person, was linked to reduced survival, said Leslie. Risk began to increase when body fat was in the order of 36 percent to 38 percent. Interestingly, being underweight also was linked to reduced survival, possibly reflecting the age-related frailty.
“It is not just the amount of body you have, but what you’re really done,” he concluded Leslie.
AND FITNESS ACCOUNT
A high BMI is one of the biggest risk factors for type 2 diabetes But a second study published in Annals Monday suggests people can still be at risk if they are skinny, but physically fit.
Researchers in Sweden and New York verified records of about 1.5 million Swedish men who at 18 received medical examinations for compulsory military service, and tracked how many developed diabetes many years later.
Under muscle strength and aerobic capacity under each is associated with an increased risk of diabetes, regardless of whether the men were normal weight or overweight. Scoring low as contributing to the risk.
What the results mean mean?
For diabetes “normal weight people can not receive advice from appropriate lifestyle if they are sedentary or unfit due to lower perceived risk,” wrote obesity specialist Peter Katzmarzyk of the Pennington Biomedical Research Center of Louisiana who was not involved in the study.
This study also suggests fitness in adolescence can have a lasting impact.
and Leslie said doctors should consider patients’ body composition, weight not only in the health assessment.
HOW TO TELL
Most people do not benefit from a DEXA scanning for fat, said Dympna Gallagher, who heads the laboratory of the human body composition at Columbia University Medical Center and believes that these tests are for research the real life.
Other methods for determining the range raft body skinfold measurement scales “bioimpedance” using a small electrical current, but they all have different degrees of error, Gallagher said. Moreover, normal body fat varies with age and there is no agreement on the best cutoffs for health, he said.
Your recommendation: Check your waist, even if your BMI is normal. Abdominal fat, a figure shaped apple, is more dangerous than fat deposited on the hips. The government says that men have a higher risk of health problems if their waist circumference greater than 40 inches and 35 inches for women.
This article was originally published on medicalxpress, Read the original article
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