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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: Total Force Fitness

High-flying meals for U-2 pilots

“Tube food” provides meals for U-2 pilots on long missions.

Army researchers have developed a special method of meal delivery for U-2 pilots on long flight missions, which can sometimes last up to 12 hours. Pressurized suits and bulky equipment limit pilot movement and prevent them from opening their helmet visors—so feeding themselves until now has been impossible. Chefs and nutritionists in Natick, MA, teamed up to create meals that meet a pilot’s calorie and nutrition needs. The meals are turned into a consistency similar to baby food and delivered to the pilot by way of a metallic tube about the size of a tube of toothpaste. The containers fit into a port on the pilot’s helmet in a way that doesn’t interfere with the suit’s pressure. Watch this video to see these tube meals in action!

What are the favorites among pilots? Caffeinated chocolate pudding and chicken-à-la-king are the most popular. Other meals include beef stroganoff, key lime pie, applesauce, and sloppy joe.

Raspberry ketone—the latest weight-loss craze

Raspberry ketone is a food additive and aromatic compound now being sold as a dietary supplement/ingredient touted to reduce fat and weight. Find out the facts and the science behind it all.

Raspberry ketone, touted to be an effective fat-loss and weight-loss supplement, occurs naturally in various red raspberries. The raspberry ketone in supplements is probably produced in the laboratory, as it would be too expensive to extract it from real raspberries. FDA recognizes that raspberry ketone as a food additive is “Generally Recognized as Safe” (GRAS) to consume in small amounts. However, the long-term effects in humans who consume it as a supplement are unknown. For more information, read HPRC’s InfoReveal on “Raspberry ketone.”

TENS (Transcutaneous Electrical Nerve Stimulation) for pain?

HPRC Fitness Arena: Mind Tactics, Total Force Fitness
Many different types of pain respond to transcutaneous electrical nerve stimulation, or TENS—read on to find out if this therapy might be appropriate for you.

Transcutaneous Electrical Nerve Stimulation (TENS) is a sort of "electrical massage" that works by sending increased “traffic” to the brain to block pain signals. It may provide short-term relief for neuropathic/phantom, chronic, post-surgery, and arthritis pain, but it rarely offers long-term relief. For more in-depth information, read HPRC’s InfoReveal on TENS for pain management.

Healthy hearing habits for your children

Everyday noise pollution may not seem as bad as what Warfighters face, but children need to protect their hearing too. Help yours develop good hearing habits early, and they’ll be better prepared for whatever they face later in life.


Hearing is usually one of those abilities we take for granted—until we lose it. Make sure your children know the importance of hearing, and help them by encouraging healthy hearing habits. Just like helping them make healthy food choices or exercise, you can help your kids learn healthy hearing habits. The Department of Defense has a Hearing Center of Excellence that does research and provides educational information on the importance of hearing for optimal performance. Last month they wrote a blog on nurturing healthy hearing habits in your children that offers the following three tips:

  1. Talk to children about the importance of protecting their hearing in their everyday lives. Awareness of noise pollution is the first step towards a lifetime of healthy hearing.
  2. Make it fun. HCE has links to online tools such as an interactive sound ruler, games, and videos. (The Centers for Disease Control and Prevention also has a fun “Noise Meter.”)
  3. Make it a family affair; discuss how you deal with noise and demonstrate what you do to protect your own hearing, such as turning down the sound on video games and MP3 players. Your children will follow your example.

If you instill good hearing habits in your children now, they will be ready as adults to cope with the kinds of noise pollution that have been leading to hearing loss among Warfighters.

Noise pollution and hearing loss

HPRC Fitness Arena: Environment, Total Force Fitness
Helicopter propellers, jet engines, explosions, moving vehicles, gunfire and more—all sources of noise pollution that troops may experience in the line of duty—can affect one’s health, especially hearing.

Being able to hear well is crucial for a Warfighter, not only for effective communication but also for survival. Noise-related hearing loss, including tinnitus, can be a tactical risk for individual and unit effectiveness. Blast injuries from improvised explosive devices (IEDs), RPGs, and mortar rounds are the largest cause of hearing loss for forces in Iraq. Unfortunately, it has become an "invisible" injury and an accepted outcome of military service. Compensation payments for hearing loss as the primary disability increased 319% between 2001 and 2006. While the military has done extensive research and established standards regarding noise and noise exposure, here are a few things you can do to help minimize the effects of this occupational hazard.

  • Wear hearing protectors when firing weapons or traveling in noisy vehicles or aircraft.
  • Make sure that earplugs such as combat arms earplugs (CAE) fit properly to protect your hearing and still communicate effectively.
  • Replace lost or damaged hearing protectors as soon as possible.
  • Limit exposure to “annoying noise” during normal daily activities. Trying to ignore noise can increase heart rate and blood pressure, cause sleep difficulties, and lead other negative health consequences.
  • Report any signs of hearing loss as soon as possible.

While there is currently no cure for tinnitus, there are treatments available. Noise pollution may be an inevitable part of serving in the military, but it doesn’t have to leave you with a permanent reminder. Do what you can to help hold on to your hearing.

The DoD Hearing Center of Excellence is committed to preventing, treating, and rehabilitating hearing loss and auditory injury for service members and veterans. The HCE offers evidence-based clinical care in collaboration with other organizations and Centers of Excellence to improve quality of life and raise awareness about noise pollution and occupational safety.

Strength training reduces risk of injury

Building muscle is key for optimal performance, as well as maintaining healthy bones and preventing injury.

Strength training is an important aspect of military fitness and resilience. Building muscle through strength and endurance training can increase bone density, improve balance and stability, and reduce your risk for injury. There are several training options for getting strong: free weights, machine weights, body-weight exercises, and/or circuit training are all effective strategies for building muscle. For more details, read HPRC’s Performance Strategies for Muscular Strength. If you have never done a resistance-training program, learn the proper form first by working out with a professional instructor, which will keep you injury-free and help you choose a program you can stick with. Training for the PFT/PRT? Read more about building muscular strength and endurance for optimal test results.

Dietary supplements and surgical procedures

Be careful about using dietary supplements if you are planning to have surgery or if you have recently had surgery. Some ingredients could cause problems.

Be extra cautious when taking dietary supplements before and after surgical procedures; some products can have serious negative effects on surgical procedures. For instance, certain supplements prevent certain blood cells (platelets) from clumping, resulting in excessive bleeding during surgery. Some of the ingredients commonly found in supplements that hinder platelet aggregation are ginko biloba, saw palmetto, glucosamine, black tea, fish oil, and garlic. If you are having a surgical operation, consider abstaining from these items or consume these items in moderation a few weeks before and after the procedure. For more a complete list of products and additional information, including other surgical risks associated with dietary supplements, read this web page from the Natural Medicines Comprehensive Database. And always read product labels carefully; many include warnings of potential medical risks, including the length of time prior to surgery that you should discontinue use.

Take a deep breath and relax

HPRC Fitness Arena: Mind Tactics, Total Force Fitness
All the added stresses of military life can leave your body’s muscles tight and sore. Deep breathing exercises can help release that excess physical tension.

Have you breathed deeply lately? Breathing’s not something we usually have to think about, so we tend to take it for granted. But our breath can be a powerful tool for relaxation and stress relief. Taking time every day to focus on deliberate breathing—that is, breathing deeply and with control—can allow your body’s relaxation response to kick in and help you de-stress.

Slow-paced and deep-breathing exercises have been widely studied for their relaxing effects on the body’s stress response system. There are several types of deep-breathing exercises you can perform, but one of the easiest and most common is just called “deep breathing” (or “diaphragmatic breathing”). HPRC has a video on Breathing Exercises for Optimized Performance that introduces three breathing strategies for human performance optimization: “Deep Breathing,” “Alternate Nostril Breathing,” and “Fast-Paced Breathing.” A longer version is available for you to practice along with the instructor, or you can download a Performance Strategies transcript that takes you through these breathing exercises step-by-step to achieve relaxation.

For more ideas on relaxation strategies, check out the Stress Control resources in HPRC’s Mind Tactics domain.

Pause—to be prepared

HPRC Fitness Arena: Mind Tactics, Total Force Fitness
The best way to deal with the tough times is to be ready for them. When faced with a challenge, take a moment to reflect on the best way to react.

Tough times challenge you to grow and develop new skills to deal with new challenges. If you find yourself in a tough situation you can’t change, you can at least control how you react while you’re in it. It’s how you interpret a situation that determines how you react to it. Therefore, if you find yourself in a tough situation, pause—think about what you can (and cannot) control, starting with your thoughts. This can often give you strength in new areas. Reflecting, meditating, praying—or in some way connecting to something greater than yourself—is a performance tool that can help you persevere through the challenges you may encounter along the way.

For more ideas on how to take charge of your thinking, check out the HPRC’s Performance Strategies on “Reframing your thinking traps for peak performance.” And for even more ways to persevere, check out HPRC’s Performance Strategies for “Optimizing Your Body’s Response.” Finally, for more ideas related to spirituality, check out the Spirituality section of HPRC’s website.

Think PINK for optimal sleep

Pink could be your new favorite color, at least when it comes to sleep. This kind of noise may help you get the quality of sleep your body needs.

Total Force Fitness requires optimal performance, and optimal performance requires optimal sleep. One way to get your best sleep may lie in some of the subtle sounds you hear every day. You may have heard of “white” noise, a type of random, constant sound that can filter or mask surrounding noises. Studies have now found that another kind of sound—“pink” noise—can help your sleep be even more restful than actual silence. Unlike white noise, the volume of pink noise is essentially the same regardless of its frequency. (For serious audio buffs, here’s an explanation from Georgia State University’s “HyperPhysics” department.) When you think of pink noise, think of rain falling or the rhythm of a heartbeat. This kind of noise regulates and synchronizes with your brainwaves, which enhances the percentage of time you’re in a restful, stable sleep. Pink noise might be another strategy to add to your arsenal for getting better sleep. You can get recordings of pink noise from a variety of sources online—some even free—for your smartphone or other mp3 player or cd/dvd player. A little searching should turn up something you like. And read more about the importance of sleep and how it affects your performance.

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