Category Archives: Health & Fitness

Today is Food Day 2012

Today is Food Day, with the goal to improve the health and quality of life for everyone by promoting healthy eating, supporting local farms, making sure everyone has access to healthy food, and reducing the influence of food corporations that produce and advertise unhealthy food, particularly to children. Food Day is the topic of my weekly Health & Fitness column in the Aiken Standard.

Here is an example of the wide impact that our food choices have on our health, the environment, and the health of others:

Say your next meal is lunch and you will have a burger. Sure you know that the beef comes from a cow, but do you know that the conditions in which the cow lived and what it ate have an effect on the quality of your burger, your chances of getting a food-borne illness, and the environment? Most of the meat we eat comes from animals that live on huge confined animal feeding operations (CAFOs) and are processed in plants that are hazardous to workers, the environment, and our health. At CAFOs cows eat primarily grain and the meat has higher levels of unhealthy fats and is more likely to be contaminated with potentially dangerous bacteria. Huge feedlots with as many as 50,000 cows have to use antibiotics to prevent the spread of disease and the tons of waste created leads to local air and water pollution. Because your burger likely came from the western U.S., there is an environmental cost of transportation across the country. And consider that the money you pay goes to the corporations that own the cows, farms, and processing plants, people who likely have no connection to you.

But what if your burger came from a cow on a farm in our area. Smaller farms tend to let cattle graze in fields and meat from grass-fed cattle have higher levels of healthy fat and a lower risk of contamination, in addition to tasting better. The relatively small amount of waste created is probably used as fertilizer on the farm and since the farm is local, the transportation costs, both in dollar and environmental terms, are lower. The money you pay goes to the owners and workers on the farm who most likely live, and pay taxes, in this area.

So, how will you celebrate Food Day? For starters, you could learn more about what you eat and take steps to eat more real food and less processed “food-like substances.” Here are some additional resources to help you learn more about the health, environmental, and economic issues related to Food Day:

A good place to start is the Food Day website.

The Center for Science in the Public Interest is the consumer advocacy organization behind Food Day and an excellent resource for nutrition and health information.

Michael Pollan is one of my favorite experts on food. He is the author of several books, all of which should be required reading for pretty much everyone (kids, too–he has kids versions of his books). Start with In Defense of Food, which offers this elegant bit of advice: Eat food. Not too much. Mostly vegetables.

Marion Nestle is an expert on nutrition and food policy, in particular the politics that surround these topics. Her book, Food Politics, explains the political and corporate factors that influence government decisions and policy regarding food and nutrition. What to Eat is a comprehensive guide to making smart choices for healthy eating.

Maybe you would prefer a movie instead. Food, Inc. is a 2008 documentary that examines the health and the environmental impacts of food production. The themes are similar to those in the book In Defense of Food, but this is a compelling movie whether you have read the book or not.

Aside

Getting in shape doesn’t require spending hours at the gym. In fact, you can do it at home  in as little as 10 minutes per day. A growing number of 10 minute exercise programs promise that you can build muscle … Continue reading

Health by the numbers

There are many numbers you know (or should know) that are important to your health. Your blood pressure, total cholesterol, and body weight are a few.

But did you know that the numbers 0, 5, 10, 25, and 30 are just as important for good health? Any one of these numbers can reduce your risk of chronic disease and death. Combining all of them greatly improves your health and longevity.

You can learn more about these numbers, and how you can use them to improve your health, in my Health & Fitness column in the Aiken Standard this week.

Then, you can learn more about what these numbers represent at the links below:

If you smoke, you can learn more about the Health effects of smoking and get Information about smoking cessation.

Information about the importance of including fruits and vegetables in your diet as well as General nutrition guidelines for good health.

Check out the current Physical activity guidelines and a host of tools to help you become more active.

You can determine your body mass index (BMI) using this BMI calculator and get more information about losing weight and maintaining a healthy body weight.

Preseason practice safety

My Health & Fitness column in the Aiken Standard this week is about preseason sports safety. The major issues I raised involve risks associated with doing too much vigorous training  in a hot, humid environment and the potential for concussion, especially in contact sports like football.

This topic was covered in a recent NPR  interview  with Dr. Douglas Casa of the Korey Stringer Institute at the University of Connecticut in Storrs, Connecticut. You can also watch a video in which Dr. Casa discusses hydration and preventing heat illness in young athletes.

The topic of concussion is addressed in this video of a lecture given by Dr. Kevin Guskiewicz, Professor of Exercise and Sport Science at UNC-Chapel Hill and MacArthur Foundation “Genius” award winner.

You can learn more about sports injury prevention and the role of certified athletic trainers in keeping young athletes safe from the National Athletic Trainers Association (NATA). All athletic trainers working in our area at certified by the NATA.

More about low-carbohydrate diets

My Health & Fitness column in the Aiken Standard today is a follow-up to my column from last week about low-carbohydrate diets. These diets are both popular and effective for weight loss, but are criticized by many because they restrict many foods that are known to be an important part of a healthy diet—fruits, vegetables, and whole grains. It is possible that these diets are effect not because they restrict all carbohydrates, but because they limit the intake of “unhealthy” carbohydrates such as sugars and refined grains. The downside is that carbohydrate sources like whole grains are also restricted.

The best diet, then, might be one that emphasizes the right carbohydrates in the diet by limiting sugars and refined grains. Considering that these nutrients are a major part of the typical American diet, this would also have the effect of reducing calorie intake, leading to weight loss.

Two important goals of any weight loss diet should be to 1) reduce calories to promote weight loss and 2) promote the consumption of healthy foods. These two goals are essential for long-term weight management and reducing the risk of chronic disease. One excellent diet that meets both of these goals is the DASH diet. It is so effective that people who follow the DASH diet tend to lose weight even when they aren’t really trying! You can learn more about the DASH diet here.

Are low-carbohydrate diets the best for losing weight and keeping it off?

For many people, low-carbohydrate, high-protein diets like the Atkins diet are the best choice for losing weight. But for years, most weight loss experts have cautioned that these diets increase the risk for heart disease and are unlikely to work for long-term weight management. In recent years a number of weight loss experts have stated that low-carbohydrate diets really are the most effective diets to promote weight loss, citing research published in medical journals to support their case. This is the topic of my Health & Fitness column in the Aiken Standard this week.

I cite two studies in my column. The first examined the effect of several popular diets, including the Atkins diet, on weight loss over a one year period of time.  The results showed that subjects following the low-carbohydrate diet lost the greatest amount of weight during the one year study.  The second, more recent study, looked at the effect of three diets of varying carbohydrate, fat, and protein content on metabolic rate, a predictor of weight regain. The thinking is that if metabolic rate is maintained closer to normal, weight gain is less likely to occur. (Metabolic rate typically declines following weight loss, which may be a factor in regaining weight following a diet).

Does this mean that low-carbohydrate diets have won the diet war? I think it is too soon to tell. In my column I discuss several factors that are important to consider when evaluating these studies. Further research about the long-term effects of these diets on body weight, heart disease risk, and other health outcomes in free-living subjects is needed before a winner can be declared. In particular, the long-term health risks of following a low-carbohydrate diet cannot be ignored, as this recent study shows.

One thing is for sure: Based on recent research, low-carbohydrate diets should not be dismissed as a fad, and further research should help us understand the safety and efficacy of these popular diets.

0 + 0 = too much!

When can zero be too much? When it comes to trans fats. Excess consumption of trans fats is linked to high LDL (bad) cholesterol and a high risk of heart disease. The Nutrition Facts panel on food labels now contains the trans fat content of the food in grams. You should look for foods that contain little to no trans fat–as well as low levels of saturated fat, which is also linked to heart disease. But did you know that a food that is labeled as containing 0 grams of trans fat may actually contain up to 0.49 grams? It’s one of example of how food labels can be confusing and, at times, misleading.

You can read more about food labels and trans fats  in my Health & Fitness column in the Aiken Standard.

You can learn more about the Nutrition Facts panel and deciphering food labels here.

HIIT me! Is high-intensity training right for you?

My Health & Fitness column in the Aiken Standard this week is about the benefits  and potential drawbacks of high-intensity interval training (HIIT). With this type of training, even a few minutes of very intense exercise can lead to improvements in fitness that are greater than can be achieved through longer training sessions at a lower intensity. But the level of effort needed to see these improvements may be too much for many people.

You can learn more about the benefits of high-intensity training from this recent article: Physiological adaptations to low-volume, high-intensity interval training in health and disease.

That article might be a dense for non-scientists, so a more user-friendly alternative is here: How 1 minute intervals can improve our health.

Do toning shoes work?

My Health & Fitness column in the Aiken Standard this week is about toning shoes and whether the claims made by the shoe manufacturers can be believed. Based on research that I presented, and that presented by others, at the American College of Sports Medicine Annual Meeting last week in San Francisco, the answer is no!

Claims that toning shoes cause you to burn more calories and promote weight loss were not supported by my own study and another similar study, both of which showed no meaningful difference in calories burned wearing toning shoes compared to regular shoes.

Similarly, the claims that toning shoes can strengthen and tone muscles in the legs were not supported by several studies that showed no real difference in muscle activation while walking or standing in the toning shoes. (abstracts from these presentations are available here)

This research is in accordance with a previous study that showed that toning shoes do not cause changes in muscle activation or in the energy expended during walking.

My study did show that people tended to walk more and eat fewer calories on days when they were wearing toning shoes compared to days when they wore their regular shoes. It seems as if wearing the toning shoes encouraged people to make healthier activity and dietary choices. This study only lasted two weeks, so we don’t know if this represented a lasting change or not. But if these changes were maintained, they could lead to weight loss in the long run.

The bottom line is that wearing toning shoes isn’t the answer to weight loss or toned muscles as the shoe companies suggest. But if wearing them makes you walk more–most subjects report that walking in them is very comfortable–then it won’t hurt.

It seems like the shoe companies and the public are getting this message. The sales of toning shoes dropped from $1.1 billion in 2010 to $550 million in 2011. And two shoe companies recently paid a combined $65 million to settle consumer complaints about their effectiveness. (You can read more about this here)

How to make your normal diet more normal

If you are trying to lose weight you may wonder which diet is the best. In reality, there is no “best” diet, since it is possible to lose weight following almost any diet. But there are characteristics of diets that tend to promote better long term success:

  1. Reduce calorie, fat and sugar intake,
  2. Emphasize whole grains, fruits, vegetables and low-fat protein sources,
  3. Incorporate “real” food and teach healthy choices,
  4. Reduce portion sizes and
  5. Include regular exercise.

The last two are particularly important since reducing portion sizes almost always reduces calories, and daily exercise will increase weight-loss and help you keep it off. The goal of a good diet should be for you to learn how to change your lifestyle for long-term weight maintenance, not just short-term weight loss. The result may be losing weight more slowly, but you are less likely to gain it back.

There is a diet that I recommend to everyone: The DASH diet. This diet was originally developed to treat high blood pressure – DASH stands for Dietary Approaches Stop Hypertension – but research showed that it led to weight loss. The DASH diet is low in red meat, added sugar and fat and emphasizes whole grains, fruits, vegetables and low-fat dairy foods. It is widely considered to be a healthy diet and has been shown to lower blood pressure, blood cholesterol and blood glucose in addition to promoting weight loss. Best of all, information about the DASH diet is available for free at www.nhlbi.nih.gov/health/public/heart/hbp/dash/.

The DASH diet is an excellent way to eat for promoting weight loss and maintaining your weight. Even if you don’t need to lose weight, the makeup of the diet is consistent with preventing and treating other health problems and maintaining your weight over time.