Tag Archive for: obesity

The Cause of Obesity: Muscle Aging

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In the previous message, I said that there was one factor besides calorie intake that affected the rate of obesity in the United States. Because a picture is worth a thousand words, just take a look at the CT scans at right (1). These are scans of the thighs of a 25-year-old man and an 81-year-old man, matched for body weight and height. There are a couple of things that you can notice. The white area is the muscle and the dark area is mostly fat; the older man’s thigh has visibly less muscle mass . . .

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The Cause of Obesity: Vegetarian Diet

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Last week I talked about the causes of obesity as it related to food choices. It all comes down to calories in versus calories out. There are a couple of more points I want to make so I decided to continue the message arc this week.

Let’s begin with vegetarians. Do they have any advantage in the calories in versus calories out? Yes and no. Based on the available research, mostly done on 7th Day Adventists, vegetarians have lower average BMIs than non-vegetarians. The more vegetarian the diet, the lower the BMI, with complete vegans having the lowest . . .

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The Cause of Obesity: The Data

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The National Health and Nutrition Examination Survey, NHANES for short, is large-scale survey performed by the CDC every few years. I’ve written about studies that have used the data many times. I like the survey because they use a dietary recall from the previous 24 hours instead of a food frequency questionnaire; there’s still potential for errors, but most people can remember what they ate yesterday. It’s also open-access data, meaning that if you have the credentials, you can use the data to answer questions. A couple of Cornell researchers did have a question: did . . .

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The Real Agenda: Refined Carbohydrates

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Let’s finish up our look at the editorial in a sports medicine journal that says exercise will not help you lose weight.

While the headline certainly gets our attention, the authors really want to talk about the increase in refined carbohydrates as the cause of the obesity epidemic. I don’t disagree, but I disagree with how they’re doing it. They began by talking about an exercise myth and weight loss which was completely unnecessary. Then they ramble on about how the refined-food industry is using advertising tactics similar to the tobacco industry. The public is intentionally . . .

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Physical Activity vs. Exercise

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The authors of the editorial mentioned in the last memo suggest you’re being sold a bill of goods on the benefits of exercise as it relates to losing weight. In the opening paragraph, they state that a recently published paper claimed that 30 minutes of moderate exercise five days a week is a miracle cure for reducing the risk of and treating chronic disease. They then say that physical activity reduces the risk of developing cardiovascular disease, type 2 diabetes, dementia, and some cancers by at least 30%. Then they say physical activity is not effective to help people . . .

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The Exercise Myth

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I often begin the week’s messages by responding to a health headline gone crazy. The headline generally sensationalizes what’s in the article, usually supported with press releases with similar headlines. Not in this case; every headline I read was spot on.

Here’s the actual title of the editorial published in the British Journal of Sports Medicine.

It Is Time to Bust the Myth of Physical Inactivity and Obesity: You Cannot Outrun a Bad Diet

Before I go further, ask yourself a question: do you believe that if you exercised . . .

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Weight Loss Supplement: The Research

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Purported experts say one thing about the amphetamine-like weight loss supplement that’s in the news. Manufacturers say another. The FDA basically says nothing. “What the heck is going on around here?” is one of my favorite Vince Lombardi quotes. I’ll break things down into three questions.

Is there any evidence that Acacia rigidula contains amphetamine-like chemicals?
Yes. The research was based on analyses of the edible parts of the plants that were eaten by animals in times of drought. Everything from caffeine to nicotine to many forms of amphetamine alkaloids were identified in the . . .

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Weight Loss: A Better Solution

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Wrapping up our look at the research paper that examined the effectiveness of commercial weight loss programs, I think the authors dropped the ball. Yes, they did what they intended to do: review the research on weight loss programs with the purpose of being able to point physicians to effective programs based on the evidence. But that ends up being lame. All they did was provide an outside source the physicians could recommend; they completely ignored the idea of physicians providing weight loss programs within the medical practice.

Although the authors were all physicians or physicians in training, they think . . .

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Weight Loss: The Problem with the Study

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Continuing our look at the recently published study “Efficacy of Commercial Weight-Loss Programs: An Updated Systematic Review,” there was a significant problem with the study and most likely, not in the way you might think. I saw no problem with the statistics or measurement variables as sometimes happens. It wasn’t a meta-analysis, so there were no issues in study selection. In my opinion, it goes back to the intent of the study.

In an editorial in the same edition of the journal, the author reported that the U.S. Preventive Services Task Force, the American Heart Association . . .

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Weight Loss: The Headlines

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From the relatively benign “Commercial weight-loss programs offer little evidence of success” to the more provocative “It’s all hype: Few commercial weight-loss programs are effective,” it appeared the researchers at Johns Hopkins threw a gigantic wrench into the $2.5 billion commercial weight loss industry (1). After all, if the programs don’t work, why would anyone want to fork out the money? Or maybe, just maybe, this was more hype than anything else; let’s take a look.

A group of physicians and students from Johns Hopkins School of Medicine performed a search using traditional scientific . . .

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