>O2 HEALTH > Am I overweight?

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by Dr. Damigo; PhD

In U.S and Europe, being overweight is the norm — but it’s not normal… two-thirds of all Americans need to lose weight

Excess adipose tissue around a male's mid-section.

Excess body fat raises levels of LDL (“bad”) cholesterol and triglycerides while also lowering HDL (“good”) cholesterol levels. Obesity impairs the body’s responsiveness to insulin, raising blood sugar and insulin levels. But obesity does more than produce bad numbers: it also leads to bad health, increasing the risk of heart attack, stroke, hypertension, diabetes, gallstones, cancer, osteoarthritis, obstructive sleep apnea, fatty liver, and depression. All in all, obesity is a killer; in fact, obesity and lack of exercise are responsible for about 1,000 American deaths each day, and if present trends continue, they will soon overtake smoking as the leading preventable causes of death in the U.S.
Obesity affects men and women about equally. But you may be surprised to learn that men bear a particular burden, since obesity takes a special toll on male hormones, sexuality, and prostate health.

And if that’s not bad enough, it also increases the risk of male maladies, ranging from erectile dysfunction to BPH and prostate cancer.
A look in the mirror can give you a clue, but to find out if your weight puts you at risk for genitourinary disorders, you need a more precise assessment.
At present, the gold standard is the body mass index, or BMI. You can calculate your BMI by multiplying your weight in pounds by 703 and then dividing by your height in inches squared or by dividing your weight in kilograms by your height in meters squared. Or, if you’re like most of us, you can skip the math and use an online calculator (www.nhlbisupport.com/bmi).

The BMI gives a reasonable estimate of overall body fat. A BMI between 25 and 30 puts you in the overweight category, while a reading of 30 or more says you’re obese. But the BMI doesn’t tell you how your fat is distributed. Scientists know that while no excess body fat is good, abdominal fat is the most harmful variety. So to find out if you are at risk, simply measure your waist at your navel; for men, risk begins to rise at waist circumferences above 37.5 inches, and troubles mount over 40 inches.

It’s hard to shed excess pounds, but it is possible. There is no quick fix, but there is a slow fix: adjust your diet to take in fewer calories and ramp up your exercise to burn off more calories.

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>O2 HEALTH > The Ups and Downs of Obesity and testosterone

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by Dr. Damigo; PhD

Testosterone is the major male hormone.

As such, it’s responsible for the deep voice, large muscles, and strong bones that characterize our gender, for development of the male reproductive organs, for sperm production and libido, and for the typical male pattern of beard growth.

Obesity

After being converted to dihydrotestosterone, the hormone also spurs growth of the prostate, which is a much less welcome sign of manhood for older gents.
Testosterone levels surge at puberty and peak in early adulthood, and then after a few years of stability, the hormone begins a slow drift downward in early middle age. Because the drop in testosterone averages just 1% a year, most older men retain normal levels. But anything that accelerates the decline can nudge some men into testosterone deficiency.
Obesity lowers testosterone levels.

A study of 1,667 men ages 40 and above found that each one-point increase in BMI was associated with a 2% decrease in testosterone. IA further study of 1,862 men ages 30 and above found that waist circumference was an even stronger predictor of low testosterone levels than BMI. A four-inch increase in waist size increased a man’s odds of having a low testosterone level by 75%; for comparison, 10 years of aging increased the odds by only 36%. All in all, waist circumference was the strongest single predictor of developing symptoms of testosterone deficiency. And if you doubt these two American studies, just consider Australian research that found almost one in every seven obese men could benefit from testosterone replacement, a rate more than four times higher than in nonobese men.

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