The Paleo Recipe Book
Showing posts with label Index. Show all posts
Showing posts with label Index. Show all posts

Monday, October 17, 2011

Is the Body Mass Index the Best Measure for Health?

There's a photo of plus size model, Tara Lynn, on the cover of French Elle causing quite a stir on Facebook. To date, more than 224,000 people "Liked" the image, more than 156,000 shared the image, and more than 71,000 commented on the image.

So what?

That's a fair question. Although Tara's nude with her arms in strategic places, the image in isolation probably wouldn't have inspired me to write this article. What held my attention was the accompanying caption. The person who posted this image describes a gym that asked its patrons whether they want to be a mermaid or a whale. Not only does she choose to be a whale, she includes her Theory on Weight Gain, "We women, we gain weight because we accumulate so much wisdom and knowledge that there isn't enough space in our heads, and it spreads all over our bodies. We are not fat, we are greatly cultivated. Every time I see my curves in the mirror, I tell myself: 'How amazing am I?!'"

Because you cannot judge health from appearance alone, the purpose of this article is to determine whether the body mass index (BMI) is the best measure for health. According to the Centers for Disease Control and Prevention (CDC), approximately 33 percent of U.S. adults and 17 percent of children and adolescents aged 2 to 19 are obese. For the purpose of clarity, the CDC adheres to the common definition of obesity as a BMI of 30 or higher. For scoping purposes, this article will focus on the term obesity because medical research directly correlates obesity to other degenerative health conditions such as heart disease, diabetes, hypertension, and some cancers.

Many factors contribute to obesity such as heredity, environmental circumstances, and personal choices. Genetic disorders such as Bardet-Biedl syndrome and Prader-Willi syndrome directly lead to obesity. Cushing's disease, polycystic ovary syndrome, and medicinal drugs such as steroids and some antidepressants may also cause weight gain.

Regardless of the catalyst, weight gain is directly attributable to consuming more calories than a person's level of physical activity level is able to burn. Put differently, the Law of Thermodynamics states one must burn more calories than one consumes to lose weight. Our body converts what we eat and drink into energy and burns that energy throughout the day, even while at rest. We burn calories at varying metabolic rates. As such, individuals have varying daily caloric intake requirements to maintain normal bodily functions-again, based on how quickly we burn the calories we consume, our heredity, individual environmental circumstances, and our personal preferences for weight loss, balance, and gain. Hence, if a person has a sedentary lifestyle, the slower metabolism yields a lower caloric intake requirement.

Speaking generally, health is a state of being free of illness or injury while being of sound mind. Let's take this further. Health is a measurement of efficiency in the body's functions, including cardiorespiratory and metabolic efficiency. The National Academy of Sports Medicine (NASM) recommends aerobic exercise 5 days a week for 30 cumulative minutes per day while maintaining a heart rate between 65 and 90 percent of the person's maximum heart rate. By cumulative, this means you can work out 3 times at 10 minutes each session to accumulate 30 minutes for the day. Some ways to do this include walking the neighborhood (and take your family with you), setting up shop outdoors (play badminton in the backyard, tag, and hide and seek), and walking the stairs to do laundry and household chores.

Unfortunately, the difference between our vehicle's gas tank and our stomachs is that our gas tanks can only hold a limited amount of gas. If we try to put too much gas in the tank, the excess amount will overflow. However, our stomachs not only accept excessive amounts of food, our bodies actually adapt to the excessive food by storing the additional calories as fat. Fat, in and of its self, is not unhealthy. Our bodies rely on fat as an energy source, and interestingly enough, our bodies rely on fat as another means to protect our organs.

At age 27, Tara Lynn is a size 16 at 5' 9". She has a bust size of 38 inches, her waist is 32 inches, hips are 46 inches, and she weighs approximately 220 pounds (depending on your source). With these measurements, her BMI is 32.5 while her waist-to-hip ratio is 0.696 (i.e., pear shape, and visually, many consider this nearly perfect: 0.7 for women and 0.9 for men).

Again, so what? Is she healthy or not? Without further information (e.g., Physical Activity Readiness Questionnaire and fitness assessment), we shouldn't try to make that determination. However, her BMI is indicative of being at risk for heart disease, diabetes, hypertension, and some cancers, and as such, she needs to monitor her cardiorespiratory health proactively.

No one should gauge his or her health on appearances alone. Tara Lynn supports this and is aware that she will help to mitigate her health risks by remaining active. As long as she continues to moderate the nutrition in her diet and remain physically active, she will continue to counter the health risks associated with a higher BMI.


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Sunday, September 4, 2011

Understanding the Glycemic Index and the Glycemic Load

Are you interested in maintaining a healthy weight and a high energy level? Do you want to avoid feelings of hunger and fatigue? Have you noticed that you become lethargic after eating certain foods?

Eating healthy... can be confusing and a frustrating task. Many people know the difference between a simple (sugar, honey and fruit) and complex carbohydrate (whole grain bread, oats and brown rice). They may even try to consume plenty of complex carbohydrates and smaller amounts of simple carbohydrates. Complex carbohydrates are broken down into glucose at a slower rate than simple carbohydrates - thus providing a gradual stream of energy throughout the day.

Creating a healthy eating program is not as simple as just knowing the difference between a simple and complex carbohydrate. It's understanding how quickly a specific carbohydrate becomes metabolized into sugar (the body's source of energy for most activities) and how it impacts blood sugar (glucose) levels.

The glycemic index and glycemic load provide information about how foods affect blood sugar and insulin. The glycemic index is a numerical scale to specify how quickly and how high a specific food can raise our blood glucose level. A food that raises blood sugar levels moderately - is considered to have a low glycemic index, while a food that raises blood sugar levels above the optimal level, will have a high glycemic index.

Utilizing the glycemic index, foods are based on pure table sugar (glucose) with an index of 100, and then categorized by their ability to raise insulin levels - high (70 and above), medium (56 - 69) and low (55 or less). Interestingly, certain cereals can have index values above 100 (pure sugar) due to processing, which requires very little digestion.

The glycemic load - a ranking system for carbohydrate content in food based on their glycemic index and portion size, combines quality and quantity of a carbohydrate in one number. The glycemic load is calculated by multiplying the glycemic index by the weight of the food in grams and dividing the total by 100. A food with a glycemic index over 20 is considered high, between 11 - 20 is considered medium and if under 11, is considered low.

After consuming carbohydrate-rich foods, digestion begins - breaking down and turning food into glucose, which then enters the bloodstream - triggering the production of insulin (hormone that helps glucose get into cells) to be used for energy. Once energy needs are complete, remaining glucose can be stored in the muscles and liver for later use. However, if these areas are full, insulin helps the body store excess sugar as fat! That is why... you are what you eat!

Eating healthy - consuming foods that have a low to medium glycemic index, have the potential to help prevent and treat chronic diseases - heart disease, insulin resistance and type-2 diabetes, certain cancers, as well as improve cholesterol levels and maintain a healthy weight. Foods with a high glycemic index include white bread, watermelon, corn chips and donuts. Foods with a medium glycemic index include raisins, rye flour bread and wild rice. Foods with a low GI include whole wheat pasta, sour dough rye, chickpeas, broccoli and apples.

At the AIMS Clinic, our Board Certified, Clinical Nutritionist - together with our Medical Team can customize a healthy, glycemic index diet for you.

Matthew Speesler, MD treats patients as a whole - mind, body and spirit, with a holistic approach to uncover root causes for many medical conditions. The focus is to build health from the inside out, giving the body what it needs to heal, recover and restore itself. Our Team of Experts and friendly staff at your local East Brunswick, NJ AIMS Clinic will help you reduce or eliminate pain and improve function.


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