Stop Dieting And Start Pounding Your Bones

Two recent studies by diet and health researchers confirm that dieting alone is not the best or the healthiest way to go about weight loss.

Dennis T. Villareal, M.D., Washington University School of Medicine, St. Louis, and colleagues studied the effects of weight loss on bone loss in 48 adults with an average age of 57. Nineteen were assigned to follow a calorie-restricted diet, 19 to eat the same number of calories and begin an exercise, and 10 to receive information on healthy lifestyles only when requested.

All participants were weighed at the beginning of the study and again after one, three, six, nine and 12 months. Bone mineral density was measured every three months.

After one year, those in the calorie restriction group lost an average of 18.1 pounds, those in the exercise intervention group lost 14.8 pounds and those in the healthy lifestyle group maintained their weight. Individuals in the calorie-restriction group also lost an average of 2.2 percent of their bone density in the lower spine, 2.2 percent at the hip and 2.1 percent at the top end of the femur--all high-risk fracture sites.

There were no significant changes in bone mineral density in the exercise or healthy lifestyle groups.

Muscles pulling on bones during exercise is thought to produce strains in the skeleton that stimulate new bone production. "Our results are consistent with an osteoprotective effect of exercise-induced mechanical strain on the skeleton and consequent increase in bone turnover," the authors continue.

In another study, a Washington University team of scientists studied healthy 50- to 60-year olds whose body mass index was between 23 and 30, placing them at the high end of normal weight or overweight. Of the 34 study participants, 18 dieted and 16 exercised to lose weight.

After one year the participants lost an average of between 9 and 10 percent of their total body weight.

Those who dieted lost muscle mass while those who exercised did not. This is because the exercisers routinely challenged their muscles, which prevented muscle tissue from degrading. A subgroup that did 30 minutes per day of extra exercise lost an average of 18 percent of their total body weight with no loss of muscle tissue.

The lesson is clear. If you diet alone to lose weight you are only creating a lighter bag of skin. For healthy weight loss you must work your muscles and pound your bones.

Here is a simple formula that you can use to lose two pounds of body fat per week. One pound of fat = 3,500 calories. If you do nothing to change your eating habits, and exercise to burn 7,000 calories per week, you will lose two pounds of body fat per week and keep or build your bone density and muscle at the same time. A win-win.

Putting your feet on the ground at about 75 counts per minute burns .078 Calories/Minute/Pound of Body Weight, or more easily remembered, 7.8 calories per minute, or 468 calories per hour, per 100 pounds of body weight.

A 200 pound person would require about 7 1/2 hours per week of exercise that pounded their feet on the ground 75 times per minute. Use this formula to convert for your situation:

(Your Body Weight/100) * 468 * (Steps Per Minute/75) = Calories Per Hour. Divide 7,000 by the Calories Per Hour figure and that is how many hours of exercise per week you must do to lose 2 pounds of body fat. If you cannot find a way to lose 2 pounds of body fat per week then shoot to eliminate 1 pound of body fat per week. That is still 52 pounds of healthy weight loss per year.

Modern Imaging Unravels Causes Of Addictive Behaviour - A Possible Basis For New Therapies?
What can radiology contribute to the treatment of obesity (adipositas)? Evidently a great deal, as was made clear at the European Congress of Radiology (ECR 2007) at Austria Center Vienna. [click link for full article]

Obese Patients Run Higher Risk Of Post-Operative Complications
Obese patients have a significantly higher risk of complications following surgery, including heart attack, wound infection, nerve injury and urinary tract infection, according to a new study from researchers at the University of Michigan Health System. [click link for full article]

News Roundup and Quick Links
The Carrot Diet A woman eats carrots every 15 minutes for 3 months in order to cure her infertility. The solution seemed to work as she became pregnant. A tabloid special Active kids say slim "Children who did 15 minutes a day of moderate exercise -- equivalent to a brisk walk -- were 50 percent less likely than inactive...

First UK Study To Determine How General Practice Professionals Can Tackle Adolescent Obesity
Academics at the University of Hertfordshire are conducting the first UK study to investigate how health professionals based in general practice can help adolescents who are obese to lose weight. [click link for full article]

As Obesity In Children Increases, The Incidence Of Fatty Liver Disease Rises
Indiana University School of Medicine researchers are taking a closer look at a disease whose incidence is rising as obesity in children increases. Non-Alcoholic Steatohepatitis, more popularly known as Fatty Liver Disease, occurs in approximately 15% of obese children. Fatty Liver Disease, in which fat accumulates in the liver, while not life threatening in children, can lead to cirrhosis (scarring) of the liver, sometimes requiring transplantation by adulthood. [click link for full article]

Obesity High Among Baltimore's Homeless, Johns Hopkins Researchers Say
A small but telling study from the Johns Hopkins Children's Center reveals an ominous trend: more than expected, obesity shadows Baltimore's homeless children and their caregivers, putting them at high risk for heart disease, stroke and type 2 diabetes, among other conditions."Not long ago, homeless people were undernourished. [click link for full article]

How to Display a Picture in Your Comments
I've finally enabled avatars / pictures for commenters. Here's how you do it. Go to a site called Gravatar. Follow the instructions by entering your email (make sure it is the same email address that you use for your diet-blog.com comments!). Once registered you can upload a picture. From then on your picture will display next to your comment (see...