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.
It’s important to get enough water, especially when it’s hot. However, too much water can lead to a dangerous condition known as hyponatremia in which the sodium levels in your blood drop too low. It’s often caused by drinking too much water and is common among military personnel, athletes, and hikers. Significant weight gain (due to fluid retention) during exercise can occur, along with longer finish times for endurance activities. If you have a Body Mass Index (BMI) below 20, you are more likely to develop this condition. For more in-depth information, read HPRC’s InfoReveal on over-hydration.
The trend of adding caffeine to new food products has led the FDA to take another look at caffeine regulations. In particular, they have decided to look into caffeine being added to foods, as reported in this Consumer Update. The FDA approved the addition of caffeine to colas (specifically) in the 1950s, but the addition of caffeine to foods and beverages popular with children and adolescents, such as waffles, chewing gum, and energy drinks, has prompted them to take a fresh look at the possible impact of caffeine on children and adolescents’ health.
Currently, the FDA has not set a safe amount of daily caffeine consumption for children. Medical professionals discourage any caffeine consumption and state that children and teens should take in no more than 100 mg of caffeine per day. To put that in perspective, an eight-ounce cup of coffee typically contains about 100 mg (or more), and the most popular caffeine-containing sodas contain around 30 to 55 mg in a 12-ounce can (a 12-ounce soda cannot contain more than 68 mg of caffeine). Not knowing how much caffeine and other stimulants are contained in the drinks and foods children eat is a concern. In the meantime, for a better understanding of the effects of caffeine, read this article from the American Academy of Pediatrics.
According to the 2010 Dietary Guidelines for Americans, solid fats and added sugars (SoFAS) contribute nearly one-third of the average person’s daily calories!
Solid fats, as the name implies, are solid at room temperature; they include both saturated and trans fats. They tend to raise “bad” (LDL) cholesterol, increasing your risk for heart disease. Sources of solid fats include butter, cheese, meats, and foods made with these products, such as cookies, pizza, burgers, and fried foods. For more information, read how to tell the difference between solid fats and oils.
Added sugars can contribute to weight gain and tooth decay. Although some foods such as fruit and milk contain naturally occurring sugars, added sugars are usually found in processed foods such as sodas, sports or energy drinks, candy, and most dessert items. It can be hard to identify added sugars on food labels, but you can learn how to recognize hidden sources of sugar.
Foods containing SoFAS are often high in calories but don’t provide many important nutrients such as vitamins, minerals, or fiber. Fortunately, it’s easy to cut back on SoFAS by eating a diet rich in whole foods such fruits and vegetables, whole grains, low-fat dairy products, and lean sources of protein, and following the MyPlate guidelines.
Looking to define your glutes, hips, and thighs? Want a total body workout to help you improve your score on the next PFT? Not close to your unit? You can access workouts complete with warm-up, cool-down, and videos of each exercise all online. There is a variety of routines, so depending on what you are looking to get out of a workout, there may be one for you. This is a handy resource for all Warfighters, but reservists and National Guardsmen often can’t work out with their unit, so these videos could provide a new twist to an individual workout. If you are far from your unit and are not able to participate in unit physical training, try these workouts! Sport-specific workouts are also available for the cyclists or swimmers in the service.
Barefoot-style, or minimalist, running shoes are still growing in popularity in the military, and the debate continues over whether this style of running prevents injuries or just causes different injuries. There is new research on minimalist running shoes (MRS) and their impact on lower leg and foot injury. After a 10-week study, runners who transitioned to Vibram FiveFinger minimalist running shoes showed signs of injury to their foot bones, while the runners who used traditional running shoes showed none. The types of injuries the MRS runners demonstrated were early signs of inflammation, which may or may not be associated with pain or joint dysfunction. If they are, it might be difficult for the runner to know he/she is actually injured until it is too late and the injury has progressed. More research is needed to determine if other factors (weight, running form/style, mileage, running surface) contribute to injuries associated with barefoot-style running. At least one recent study suggests running style may be a factor. For more in-depth information, read
Personal finances can be a major source of anxiety for Warfighters and family members. Creating a monthly budget can help. A budget is simply tracking money that comes in (income), goes out (expenses), and sticks around (your savings) each month. It does take some effort in the beginning to set up a budget, but once it’s done, it’s easy to update. If you don’t like using computer spreadsheets or writing things down in a ledger book, there are free apps you can use or budgeting programs you can buy. Or check around online—MilitaryOneSource has a budget worksheet. Or get help—some of the Military and Family Life Counselors (MFLC) are Personal Financial Management (PFM) counselors too. They are familiar with military life and its financial challenges, and using their services is free. Visit Military INSTALLATIONS to find the closest PFM to you. Finally, most banks offer tips on their websites on how to save and manage debt, and your local branch may offer free financial seminars.
The key to reducing expenses in order to save is easy—spend less. Many people, however, have a hard time cutting back on spending. A budget can help you keep on track. Saving money takes effort, but it’s worth it for your financial future.
Basic Formula: “Money In” minus “Money Out” equals “Money Retained.”
Today is Military Spouse Appreciation Day! Thank you for your dedicated service to your families and our country. Day in and day out you juggle daily life, your family’s needs, and the additional demands on the spouses of those in military service. HPRC thanks you for all you do—on this day and everyday!
May is National Physical Fitness and Sports month so get out and get moving—and include your family! There are lots of great reasons to add exercise to your daily routine: It decreases your risk for chronic health problems such as diabetes and cardiovascular disease and improves your mental health. Getting outside for a walk with your children can be great bonding time and may even help them (and you) sleep better at night! You can find ideas to incorporate physical activity into your life, including interactive tool kits and planners, at the Federal Occupational Health website. HPRC also provides resources (family friendly ones, too) to help you get started and stay on track!
Pain is a sensation of both the body and the mind—and it’s within your power to use strategies such as meditation to control the mental aspect to decrease the physical sensation of pain. Meditation can teach you to have a focused, calm mind, and rhythmic breathing. It may sound easy, but it requires practice. The payoffs can be improved well-being, reduced pain, and relaxation. Want to know more? Check out HPRC’s new Pain Management section, where you can find strategies such as meditation that you can use on your own or with the help of a healthcare provider.
Sweat is a critical function when you’re performing in hot environments. As your body absorbs heat from the environment, your nervous system activates sweat glands to release sweat. The moisture on your skin then evaporates, taking heat away from your body and cooling you off.
Protective clothing impedes the evaporation of sweat and the heat exchange between you and the environment, a condition known as “evaporative resistance.” This means that the exposed parts of your body will cool off more quickly than the parts that are covered, but they are also more prone to insect bites. Reports from Marines and National Park employees feeling “excessive heat” and a loss of sweating sensations after applying moderate to high amounts of DEET to their skin brought the safety of this insect repellent into question.
In a recent study, researchers found that when 33% DEET lotion is applied according to military protocol, it does not interfere with sweat production or other physiological responses. Nor does it interfere with the evaporation process necessary for cooling to take place. Researchers concluded that 33% DEET can be worn safely during military and occupational activities performed in hot, insect-infested environments. Similar studies have found oil- or alcohol-based repellents may increase core temperature by reducing sweat evaporation rate but do not affect sweat production. The military-approved form of DEET is polymer-based.
You can watch a YouTube video about the science behind the study.
DEET is considered by the EPA to be a toxic pesticide. It should be used with caution and as directed. More information about DEET, its uses, and warnings can be found on the EPA fact sheet. As of 2004, DEET was considered safe for use on children older than two months of age. Specific information on its use and effect on children can be found in the EPA TEACH chemical summary.