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Welcome to the HPRC Blog. We've got lots of information here, from quick tips to in-depth posts about detailed human performance optimization topics.

HPRC Fitness Arena: Nutrition

Dietary supplements: What’s in them for you?

HPRC’s new Dietary Supplement Classification System offers information to help you decide whether a dietary supplement can help you reach your performance goals or whether it may have side effects you want to avoid.

What do you put in your body to boost your performance, increase your energy, shed pounds, build muscle, or otherwise supplement your diet? What’s in that drink, pill, or powder? What will it do for you? What will it do to you? Is it worth the risk?

More and more Warfighters are taking dietary supplements, most without being fully informed that some of the ingredients could have harmful side effects. HPRC has just unveiled its Dietary Supplement Classification System to provide this kind of information and help you make informed decisions about a particular supplement. To start exploring this new resource, visit HPRC’s new web pages. If you have a question, contact us via “Ask the Expert.”

FDA Alert: Multiple “tainted’ weight-loss products

Consumers are advised not to purchase or use these 18 weight-loss products, which contain the undeclared drug ingredient sibutramine.

The Food and Drug Administration (FDA) is advising consumers to stop using multiple weight-loss products that contain the undeclared drug ingredient sibutramine, which was removed from the market in 2010 for safety reasons and may present significant risks for those with coronary artery disease and other heart issues. The following 18 products have received FDA Public Notifications advising consumers not to purchase or use any of them:

  • Lose Weight Coffee
  • Dream Body Slimming Capsule
  • Pai You Guo Slim Tea
  • Botanical Slimming
  • Fruit Plant Lossing Fat Capsule
  • Sheng Yuan Fang
  • Acai Berry Soft Gel ABC
  • Tengda
  • PhentraBurn Slimming Capsules
  • Magic Slim Tea
  • Magic Slim Weight Reduction Capsule
  • P57 Hoodia
  • Leisure 18 Slimming Coffee
  • Lishou
  • A-Slim 100% Natural Slimming Capsule
  • Advanced Slim 5
  • Ja Dera 100% Natural Weight Loss Supplement
  • Slender Slim 11

For more information, see the FDA Tainted Weight Loss Products page, and click on a product name under “Public Notifications.”

Fueling the machine

HPRC Fitness Arena: Nutrition, Total Force Fitness
Food is essential to our survival and healthy eating has a big impact on your physical performance.

Warfighters must be in excellent physical condition to endure a variety of physical tasks for extended periods. Healthy eating will greatly affect your physical performance. For good health and performance, eat the energy-providing nutrients (known as macronutrients)—carbohydrates, proteins, and fats. These foods supply fuel and are involved in many functions in your body. For detailed information on each of the macronutrients, see the Warfighter Nutrition Guide.

Healthy snacking can help your performance and alertness

HPRC Fitness Arena: Nutrition, Total Force Fitness
Healthy snacking can sustain performance at home or in the field.

Whether you are at home or on operations, healthy snacking can sustain your mind and body so your performance is maximized. Keep high-nutrient foods on hand at home, while at work, or during night operations. For specific suggestions and tips on healthy snacking, see the Warfighter Nutrition Guide.

Energy drinks are really stimulant drinks

Energy drinks contain stimulants; learn how to identify potentially harmful ingredients.

Do you really know what’s in that energy drink? There are different forms of stimulants in energy drinks, many of which are prohibited.  The United States Anti-Doping Agency (USADA) has put together an information sheet on these “stimulant drinks,” including a helpful example of an ingredient label.

Nutrition for fitness

Exercise isn’t enough—you need to give your body the right kind of fuel to optimize your fitness. The new 2010 USDA Dietary Guidelines focus on balancing healthy eating with physical activity.

In order to optimize your health and physical fitness, you should consume a balanced diet as recommended by the U.S. Department of Agriculture. According to the USDA, you should limit consumption of sodas and trans-fat foods; replace solid fats with oils such as olive, canola, and safflower oils; reduce intake of added sugars and sodium; replace refined grains with whole grains; limit your alcohol intake; increase your intake of vegetables, fruits, and fat-free or low-fat milk; and replace some of the meat or poultry in your diet with seafood. More details and guidelines can be found on HPRC’s Nutrition domain, especially the recent articles on the new USDA MyPlate program and online availability of the 2010 Dietary Guidelines for Americans.

The Paleo Diet: Implications for the athlete

The Paleo Diet is based on what hunters/gatherers ate during the Paleolithic Era. But how might this affect athletes today?

The Paleo Diet, also known as the Paleolithic or Caveman Diet, is based on the notion that by consuming what humans ate during the Paleolithic Era—wild animals, plants, eggs, tree nuts, vegetables, roots, fruits, and berries—we will be healthier, have lower disease risk, and live longer. Hunters/gatherers during that time had to rely on what was available and had no agriculture. But what are the implications of this type of diet for the athlete, let alone the average individual?

Foods that were grown and introduced after the Agricultural Revolution (roughly 10,000 years ago) are not allowed in the Paleo Diet. That means dairy and dairy products, grains, and legumes (beans, peas, and lentils) are excluded. Proponents of the Paleo Diet believe that we are “genetically programmed” to follow the diet of the hunters/gatherers. A specific book has been written for athletes who want to follow this diet, which accommodate athletes by allowing some carbohydrates: The authors present five stages of eating for the athlete to follow, based on the glycemic index (GI; how quickly food raises blood glucose levels). The stages are: (1) eating before exercise, (2) during exercise, (3) and 30 minutes after exercise, and (4) during post-exercise extended recovery and (5) long-term recovery. Low- to moderate-GI carbohydrates are recommended at least two hours prior to exercise. Sports drinks or high-GI carbohydrates are recommended for exercise lasting longer than 60 minutes. Immediately after exercise a recovery drink with carbohydrate and protein in a 4:1 to 5:1 ratio is recommended. Stage IV recovery foods (extended recovery) should be a 4:1 to 5:1 carbohydrate-to-protein ratio, with carbohydrates such as raisins, potatoes, sweet potatoes, and yams. Stage V recommends focusing on eating from the main Paleo Diet, with carbohydrates coming from fruits and vegetables. So one could argue that the Paleo Diet for Athletes is like most diets for athletes in that it requires carbohydrates. However, the Paleo Diet for Athletes is higher in protein and fat and lower in carbohydrates than what is recommended for athletes by most health professionals.

What we do know from scientific research is that carbohydrates provide the energy needed for endurance and resistance training, competitive athletic events, mental agility, and healthy living. Complex carbohydrates such as fruits, vegetables, whole-grain pasta, rice and grains, beans, and other legumes contribute to an overall healthy eating plan. By limiting consumption of some of these to only a brief time after exercise, the athlete runs the risk of not having enough fuel for the body, so the body will use protein for energy. Low-fat dairy products also contribute to a healthy lifestyle, providing much-needed calcium and vitamin D as well as probiotics. The Paleo Diet eliminates dairy entirely, even for athletes.

We also know from the scientific literature that during the post-exercise period, within roughly 30-45 minutes of exercise, eating a carbohydrate/protein snack, generally with a 3:1 carbohydrate-to-protein ratio, is essential to stimulate re-synthesis of muscle proteins and replenish glycogen (the storage form of carbohydrate). It doesn’t stop there: It is important to maintain glycogen levels in the muscle and liver to sustain all activities, especially over the course of several days. Eating high-carbohydrate snacks between training sessions is important to replenish glycogen stores. Carbohydrate intake recommendations for athletes are 6 to 10 g/kg body weight per day, or roughly 55% of daily calories from carbohydrates.

What’s the bottom line? Grains and dairy products are staples of modern-day society and provide essential nutrients to an overall healthy diet. By eliminating one or more food groups, you run the risk of missing important nutrients. And can we really eat as humans did during the Paleolithic era? Their life expectancy was about one quarter to one half of what ours is, and we benefit from research showing that eating a variety of foods over the course of time provides us with energy and the important vitamins and minerals needed to sustain us in daily activities and exercise.

The family of combat rations

HPRC Fitness Arena: Nutrition, Total Force Fitness
Combat rations feed our Warfighters around the world, offering variety and nutritious alternatives to food service facilities in a wide range of deployed and combat conditions.

The Department of Defense (DoD) Combat Feeding Program (CFP) is responsible for all of the combat rations that feed service members and for the research, development, engineering, integration, and technical support of those rations. Their mission is to ensure that United States Warfighters are the best-fed in the world. It’s important that any new combat ration developed is fueled by the wants and needs of Warfighters themselves; they even field-test new rations to make sure that their requirements are being met. Items that pass their standards are then incorporated into ration menus so that they have a variety of nutritional meals to choose from.

The Meal, Ready to Eat™ (MRE™) is used by all military services to feed Warfighters during operations where food service facilities are not available. MREs are essential to military subsistence; they’re intended to provide a Warfighter’s sole sustenance for up to 21 days of deployment (in accordance with AR 40-25) and are still nutritionally adequate for longer periods if necessary. MREs™ are shelf stable for 36 months at 80˚F.

The Unitized Group Ration – Heat & Serve™ (UGR-H&S™) is designed to feed 50 Warfighters per module and is the first group meal consumed in early deployment, as soon as field kitchens (without refrigeration capability) are available. All components of the ration are pre-cooked and shelf stable for 18 months at 80˚F.

The UGR-A™ is also designed to feed 50 Warfighters per module and consists of high-quality group meals.  The UGR-A™ is the only military operational ration that contains frozen food components. It’s based on a build to-order assembly process that requires refrigerated/ frozen storage and a field kitchen for preparation.

The UGR-B™ is used primarily by the Marine Corps to provide high-quality group rations that don’t require refrigeration and are quick and easy to prepare.

The UGR-Express™ (UGR-E™) is designed to provide a complete, hot meal for 18 Warfighters in remote locations where group field feeding wouldn’t be possible otherwise. It’s a compact, self-contained, self-heating module that doesn’t require cooks or a field kitchen for preparation. With the simple pull of a tab, the food is heated in 30-45 minutes and is served in trays to Warfighters like a cook-prepared meal.

The First Strike Ration® (FSR™) is a compact, eat-on-the-move assault ration intended to be consumed during initial assault by forward-deployed Warfighters. The FSR™ is shelf stable for 24 months at 80˚F and provides a new capability in that it is 50% lighter, smaller, and easier to prepare when compared to the MRE™.

The Meal, Cold Weather™ (MCW™) and Food Packet, Long Range Patrol™ (LRP™), which contain freeze-dehydrated entrees, are designed to meet the nutritional and operational needs for extreme cold environments, special operations, and long-range reconnaissance missions. They are shelf stable for 36 months at 80˚F.

The Modular Operational Ration Enhancement™ (MORE™) is an enhancement pack designed to augment operational rations with additional calories and nutrients when Warfighters are operating in extreme environments such as high altitude in cold or hot weather.

For more information on any of the above, please call (508)-233-4670 or visit the Army’s Natick Soldier Research website.

What is Supplement Safety Now?

Supplement Safety Now is a public safety initiative to help consumers know if an OTC supplement is safe to use.

A myriad of dietary supplements make their way to the market labeled as “healthy” for the public. However, many contain dangerous substances, including steroids, and consumers have no idea they are taking harmful substances. Supplement Safety Now, a public protection initiative, was founded by the U.S. Anti-Doping Agency to make sure over-the-counter supplements are safe for consumers. For more information, read more about this initiative.

Omega-3 food sources

Find out what food sources contain omega-3 fatty acids.

Salmon is commonly touted for its omega-3 fatty acids. HPRC recently received a question about what foods other than salmon are the best sources of omega-3 fatty acids. For a complete answer, including the recommended intakes from the American Heart Association, please see HPRC’s answer.

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