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Yes. You can have a normal weight, but if your body fat percentage is high enough, you may be considered obese — a situation known as normal weight obesity. Normal weight obesity means you may have the same serious health risks as does someone who’s obese. Obesity is defined as having an excessive amount of body fat — not as weighing too much.

A formula called body mass index (BMI) is used to determine whether you’re at a healthy weight for your height. But BMI doesn’t tell the whole story because it doesn’t measure body fat. So you may have a normal BMI while your body fat percentage is high enough to increase health risks.

Researchers are still trying to determine what percentage of body fat counts as obesity when your weight is normal, and whether guidelines should be different depending on your age and sex.

Like obesity, normal weight obesity may increase your risk of serious health problems, including:

Heart disease
Diabetes
Abnormal cholesterol level, in which your triglyceride level is high, but your HDL (“good”) cholesterol level is low
High blood pressure
Metabolic syndrome

If you’re concerned about your body fat percentage, talk to your doctor. Your doctor may want to measure your body fat and recommend additional tests to see if you’re at risk of obesity-related conditions. Your doctor may also encourage you to start eating healthier and increase your activity level.

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Belly fat in women: How to keep it off

Belly fat hasn’t always been your problem — you’ve worried more about hips and thighs. Now your midsection’s making up for lost time. What’s up?


Whether it’s because of heredity, hormonal changes or aging-related weight gain, many women notice an increase in belly fat as they grow older — and especially after menopause. Gaining fat in your abdomen is particularly unhealthy when compared with other locations in your body. Excess belly fat increases your risk of cardiovascular disease, diabetes and certain types of cancers. The good news is that a few lifestyle changes and some targeted abdominal exercises can help you battle your belly bulge.

When fat gathers in your abdomen

As you age and your metabolism slows down, the amount of fat in your body slowly increases. Women experience an even greater fat percentage increase than men do. Then after menopause, your body fat distribution tends to shift — less in your arms, legs and hips, and more in your abdomen.

You may think belly fat is limited to the stuff out front that you can grab with your hand — but it’s the fat you can’t see that’s really a cause for concern. Visceral fat lies deeper inside the abdomen, surrounding the abdominal organs. Gaining this type of fat has been linked to cardiovascular disease, diabetes and other health problems. Subcutaneous fat, located between the skin and the abdominal wall, is more visible but also less likely to be a health risk.

While a slowing metabolism and decreased physical activity contribute to overall weight gain as you age, those factors don’t influence visceral fat accumulation directly. Heredity may be the culprit — you may simply have inherited a tendency to gain weight in your midsection. Hormones also play a role. Hormonal changes after menopause may change the way that your body breaks down and stores fat, leading to more fat accumulating in your belly.

Some women even experience a widening waist without gaining any weight. Although you may not be gaining extra fat, your abdominal fat is increasing as limb and hip fat decreases. Even in women of a normal weight, too much fat concentrated in the midsection is unhealthy.

The midsection matters

Gaining weight in your abdomen does more harm than simply making your waistband too tight. While putting on weight in general can have negative effects on your health, abdominal weight gain is particularly unhealthy. Too much belly fat increases your risk of:

  • Heart disease
  • Breast cancer
  • Diabetes
  • Metabolic syndrome
  • Gallbladder problems
  • High blood pressure
  • Colorectal cancer

Researchers also have found that abdominal fat cells aren’t just dormant energy waiting to be burned up. The cells are active, producing hormones and other substances that can affect your health. For example, some fat-cell-produced hormones can promote insulin resistance, a precursor to type 2 diabetes; others can produce estrogen after menopause, which may increase your breast cancer risk. Researchers are still sorting out how the excess hormones affect overall health, but they do know that too much visceral fat can disrupt the body’s normal hormonal balance.

Measuring your middle

You know you’ve gained some inches around your torso, but how can you know whether it’s an unhealthy amount? You can calculate your body mass index (BMI) or waist-hip ratio, but researchers have found that simply measuring your waist can tell you whether you have an unhealthy amount of belly fat. In fact, BMI may not be an accurate measure of body fat percentage or fat distribution, particularly after menopause.

To measure your waist, run a tape measure around your midsection at about the level of your navel. Breathe normally, don’t hold your tummy in, and don’t pull the tape so tight that it presses your skin down. In a woman of healthy weight, a waist measurement of 35 inches or more indicates an unhealthy concentration of abdominal fat. Some research has shown that a measurement of 33 inches or more, no matter what your weight, increases your health risks.

Fight back the bulge

Since visceral fat is buried deep in your abdomen, it may seem like a difficult target for spot reduction. As it turns out, visceral fat responds well to a regular exercise routine and a healthy diet. Targeted tummy exercises can help to firm the abdominal muscles and flatten the belly.

Exercise. Daily, moderate-intensity exercise is the best way to lose belly fat — when you lose weight and tone your muscles, your belly fat begins shrinking, too. In fact, you may notice that your tummy bulge is the first area to shrink when you start exercising. The amount and type of exercise you should get varies depending on your current activity level and your health goals. Talk to your doctor about the right exercise program to promote good health and specifically combat abdominal fat.

Strength training. Some research has shown that exercising with weights is effective in trimming tummy fat. Talk to your doctor about how to incorporate strength training in your exercise routine.

Healthy diet. Changing unhealthy eating habits can help fight belly fat. Read nutrition labels, and replace saturated fats with polyunsaturated fats. Increase portions of complex carbohydrates such as fruits and vegetables, and reduce simple carbohydrates like white bread and refined pasta. If you need to lose weight, reduce your portion sizes and daily calorie intake.

Tone your tummy. While you can’t “spot-burn” belly fat, you can firm up your abdominal muscles and get a flatter belly. Traditional sit-ups aren’t the most effective way to firm your tummy, however. Instead, use these exercises to target both deeper and lower abdominal muscles:

  • Deeper abdominal muscles. Target deeper abdominal muscles by doing “abdominal hollowing” or “drawing in the bellybutton.” First, get down on all fours. Let your tummy hang down as you take a deep breath. Let your breath out, and at the end of your exhalation, gently draw your bellybutton inward and upward toward your spine. You should feel a slight tightening around your waist — think of it as trying to squeeze through a partially closed door. Hold for 10 seconds, then rest for 10 seconds. Work up to 10 repetitions. During each effort, your spine position shouldn’t change and you should breathe freely. Eventually, you’ll be able to do this exercise standing up. It’s so subtle, no one should be able to tell you’re doing it.
  • Lower abdominal muscles. Tone your lower abdomen by doing pelvic tilts and pelvic lifts. To do a pelvic tilt, lie on your back on the floor with your knees bent. Flatten your back against the floor by tightening your abdominal muscles and bending your pelvis up slightly. Hold for five to 10 seconds. Repeat five times and work up to 10 to 20 repetitions.For pelvic lifts, lie on your back with your knees bent up toward your chest and your arms relaxed by your sides. Tighten your lower abdomen and lift your buttocks up off the floor, with your knees aimed toward the ceiling. Hold for five to 10 seconds. Repeat five times and work up to 10 to 20 repetitions.

Hormone therapy. Although there are good reasons for some women to try hormone replacement therapy (HRT) after menopause, fending off belly fat isn’t one of them. It’s true that some studies have demonstrated that postmenopausal women who take HRT are less likely to accumulate abdominal fat than are postmenopausal women who forgo HRT. Other studies, however, found no difference. Meanwhile, questions about the risks and benefits of HRT persist. Talk to your doctor in detail about the risks and potential benefits of hormone therapy before trying it.

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Jan/11

27

BMI in childhood

Body mass index (BMI) is defined as a person’s weight in kilograms divided by the square of their height in meters. BMI can help determine if a child is at a healthy weight. Children with a BMI measure that’s too high may be at increased risk for health problems, such as cardiovascular disorders and diabetes.

In children, BMI is taken in conjunction with age and gender and plotted on a growth chart with percentiles to assess a child’s level of body fat. Generally, children with BMI between the 5th and 85th percentiles are considered to be at a healthy weight. Those less than the 5th percentile are underweight. Children between the 85th and 95th percentiles are overweight, and those at or above the 95th percentile are obese.

Because BMI doesn’t measure body fat directly, a person who has a high level of body muscle and a low level of fat can have a high BMI level, as may be the case with athletes. But, for practical purposes, BMI is typically a reliable, inexpensive way to evaluate a child’s weight.

A child with a high BMI is at an increased risk of health problems. Research has shown that high BMI predisposes children to developing high blood pressure, high cholesterol and type 2 diabetes. These problems can occur during childhood, or they may develop as a child grows into adulthood.

In addition to the specific health conditions that may develop as a result of being overweight in childhood, one-half to three-fourths of overweight children become overweight adults. So a child with a high BMI has a high likelihood of becoming an overweight adult unless preventive steps are taken early. That’s why regularly monitoring a child’s weight is important. If a child’s BMI begins to climb, the trend is much easier to reverse in the early stages — when the child is only slightly overweight — than in the obese range.

Lifestyle changes such as eating a healthier diet and exercising more can have a big impact on a child’s weight and overall health. The Centers for Disease Control and Prevention (CDC) recommends that children engage in at least one hour of physical activity every day. That doesn’t mean kids have to play a competitive sport or even participate in an organized activity. Physical activity can be as simple as taking the dog for a long walk, biking, running around in the backyard or at a park, dancing, jumping rope or in-line skating. As long as they enjoy the activity and it gets them moving, children can choose whatever activities they like.

Along with encouraging physical activity, parents should limit the time children spend sitting in front of a screen watching television, playing video games or using a computer. The CDC recommends that children have no more than two hours of screen time each day. The American Academy of Pediatrics recommends that children under 2 years old not watch television at all.

Although childhood obesity is a big concern, the opposite can also be hazardous to a child’s current and future health. Research has shown that children who have been malnourished during early life and also babies who are born small for their gestational age (the baby’s weight is less than would be predicted for the length of time they spent in the womb) are at high risk for developing diabetes and cardiovascular health problems.

If you have concerns about your child’s weight, talk to your pediatrician or family physician. Children should never be placed on any type of calorie-restricted or calorie-enhanced diet or exercise program that hasn’t been discussed and developed in conjunction with your health care provider.

to calculate  your MBI

Imperial BMI Formula

The imperial bmi formula accepts weight measurements in pounds & height measurements in either inches or feet.
1 foot = 12 inches
inches² = inches * inches

Table: Imperial BMI Formula
BMI =
( lbs/inches² )
(weight in pounds * 703 )
————————————
height in inches²

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Jan/11

19

Getting past a weight-loss plateau

You’ve diligently worked to improve your diet and exercise habits, and you’ve been rewarded by seeing the number on the scale continue to drop. But then for no reason you can see, the scale doesn’t budge — even though you’re still eating a healthy, low-calorie diet and exercising regularly. You’ve hit a weight-loss plateau.

Before you get too discouraged, you should know that it’s normal for weight loss to slow and even stall. By understanding what causes a weight-loss plateau, you can decide how to respond and avoid backsliding on your healthy-eating and exercise habits.

What is a weight-loss plateau?

A weight-loss plateau occurs when you no longer lose weight despite continuing with your exercise and healthy-eating habits. Being stuck at a weight-loss plateau eventually happens to everyone who is trying to lose weight. At that point, losing additional weight becomes more difficult. Although hitting a plateau is common, most people are surprised when it happens to them, believing that if they just maintain a reduced-calorie diet, they should continue to lose weight. The frustrating reality is that even well-planned weight-loss efforts can become stalled.

What causes a weight-loss plateau?

The progression from initial weight loss to a weight-loss plateau follows a typical pattern. During the first few weeks of losing weight, a rapid drop in pounds is normal. When calories from food are reduced, the body gets needed energy by releasing its stores of glycogen, a type of carbohydrate found in the muscles and liver. Glycogen holds onto water, so when glycogen is burned for energy, it also releases the water — about 4 grams of water for every gram of glycogen — resulting in substantial weight loss that’s mostly water.

A plateau occurs because your metabolism — the process of burning calories for energy — slows as you lose lean tissue (muscle). When you lose weight, you lose both fat and lean tissue. (The notion that overweight people have a slower metabolism is a myth. In general, the higher a person’s weight, the higher the body’s metabolic rate.) Your weight-loss efforts result in a new equilibrium with your now slower metabolism. This means that in order to lose more weight, you need to increase activity or decrease the calories you eat. Using the same approach that worked initially will maintain your weight loss, but it won’t lead to more weight loss.

How can you overcome a weight-loss plateau?

If you’re at a plateau, you may have lost all of the weight you will given the number of calories you’re eating each day and the time you spend exercising. At this point, you need to ask yourself if you’re satisfied with your current weight or if you want to lose more, in which case you’ll need to adjust your weight-loss program. If you’re committed to losing more weight, try these tips for getting past the plateau:

  • Reassess your habits. Look back at your food and activity records. Make sure you haven’t loosened the rules, letting yourself get by with larger portions or less exercise.
  • Cut more cs. Reduce your daily calorie intake by 200 calories — provided this doesn’t put you below 1,200 calories. Fewer than 1,200 calories a day may not be enough to keep you from feeling hungry all of the time, which increases your risk of overeating.
  • Rev up your workout. Increase the amount of time you exercise by an additional 15 to 30 minutes. You might also try increasing the intensity of your  if you feel that’s possible. Additional exercise will cause you to burn more calories.
  • Pack more activity into your day. Think outside the gym. Increase your general physical activity throughout the day by walking more and using your car less, or try doing more yardwork or vigorous spring cleaning.

Don’t let a weight-loss plateau lead to an avalanche

If your efforts to get past a weight-loss plateau aren’t working, talk with your doctor or a dietitian about other tactics you can try. You may also want to revisit your weight-loss goal. Maybe the weight you’re striving for is unrealistic for you. If you’ve improved your diet and increased your exercise, you’ve already improved your health even without further weight loss. For those who are overweight or obese, even modest weight loss improves chronic health conditions related to being overweight.

Whatever you do, don’t revert back to your old eating and exercise habits. That may cause you to regain the weight that you’ve already lost.

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Jul/10

30

Weight Loss Basics

By Mayo Clinic staff

Your weight is a balancing act, and calories are part of that equation. Fad diets may promise you that counting carbs or eating a mountain of grapefruit will make the pounds drop off. But when it comes to weight loss, it’s calories that count. Weight loss comes down to burning more calories that you take in. You can do that by reducing extra calories from food and beverages and increasing calories burned through physical activity.

Once you understand that equation, you’re ready to set your weight-loss goals and make a plan for reaching them. Remember, you don’t have to do it alone. Talk to your doctor, family and friends for support. Also, plan smart: Anticipate how you’ll handle situations that challenge your resolve and the inevitable minor setbacks.

If you have serious health problems because of your weight, your doctor may suggest weight-loss surgery or medications for you. In this case, you and your doctor will need to thoroughly discuss the potential benefits and the possible risks.

But don’t forget the bottom line: The key to successful weight loss is a commitment to making permanent changes in your diet and exercise habits.

http://www.mayoclinic.com/health/weight-loss/MY00432

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