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: Environment
Heat illness is a hot topic for the military. Did you know there is a spectrum of conditions that fall under the term “heat illness,” some more severe than others? HPRC has great resources on how to prepare for exposure to hot environments and how to prevent heat illness. Read HPRC’s Answer to “What IS heat illness?” for more about what heat illness is and how to identify the signs that you might be developing more serious conditions.
On September 11, join an online webinar, Can You Hear Me? An Introduction to Hearing Loss Prevention, sponsored by the CDC, to discuss the primary causes of hearing loss, and learn how to prevent it. This educational event is free; however, there are a limited number of open lines, so log in early.
Although the military does not allow women to take part in direct combat, they routinely face the dangers of war. The Pentagon was recently pressed to develop better-fitting body armor for female soldiers, recognizing that men and women have different body shapes. Women have more curves, shorter torsos, and narrower shoulders than most of their male counterparts. The current male-based body armor creates gaps and additional pressure points that leaves service women vulnerable and reduces their performance (aiming a weapon, entering and exiting vehicles, etc).
Engineers are looking to create plates that conform to the female body, similar to the armor worn by TV’s popular Xena: Warrior Princess. There are some concerns regarding weight and protection, but so far the Army has tested eight sizes, with positive feedback from women Warfighters.
In 2004, the U.S. Army digitized its former camouflage pattern on standard issue uniforms. It was termed “Universal Camouflage Pattern,” or UCP, with the hope that it would serve as a one-print-fits-all for any environment. The theory behind the digital print was not the result of a fashion craze; it started in the late 1970s with two psychology professors at West Point. Neuroscientists divided the human visual system into two parallel circuits. One circuit told us where objects were located, the other what objects were. Officially called the “Dual Texture Gradient,” the idea was that the pixelated pattern would interfere with those circuits and make it difficult to identify objects. More research, based on how our brains processed MRI scans as boxes and rectangles, led camouflage experts to similar conclusions, that this pattern was smart camo. Initially, the Marines adopted the pattern from the Canadians. However, the pattern failed early trials in the U.S. Army, and troops reported that it performed poorly in combat.
In 2009, after a camo detection study, the Army revised the design for ground troops in Afghanistan to the current “MultiCam” pattern as a temporary solution. Currently, four designs from non-government vendors are in a bid to become the next camo pattern. Submissions required that designs include a woodland variant, a desert variant, and a transitional variant for every environment in between. The goal of extensive field tests will be to optimize performance range from 35-400 meters in a woodland environment and 35-500 meters in a transitional and desert environment. Testing of the first pattern, which resembles reptile skin, began in June. Testing of the other patterns could last up to nine months, and production of the new uniforms could begin as early as 2013.
Our bodies know when to sleep thanks to “circadian rhythms,” which are regulated by our brains on a 24-hour cycle. Circadian rhythms are linked to core body temperature, so ideally you should always sleep between 0300 and 0500, when your core body temperature is lowest and your performance abilities are at their lowest. Keep in mind that your individual circadian schedule is based on where you are and takes cue from environmental factors such as the sun and from social patterns. When crossing time zones, your internal clock needs time to adjust, which can take several days. Factors that influence this adaptation are:
- how many time zones are crossed, and
- whether you fly eastward or westward—the former takes longer to adjust.
Keep in mind that, in order to make up sleep or to adjust to a new zone, the best times to sleep are between 0300-0500 or 1300-1500.
For tips on how to improve your quality or length of sleep check out HPRC’s Sleep Optimization section, and for information on how sleep loss impacts all of the areas of Total Fitness check out HPRC’s Overview on sleep loss.
It’s always a good idea to replace old sunscreen, but next summer you’ll have even more reason to do so. Sunscreen companies have until December 2012 to revise their labels to abide by FDA’s new guidelines. The new labels will prevent manufacturers from false advertising with respect to the level of protection they provide. Sunscreens also will have to go through FDA’s testing to determine their effectiveness.
The new guidelines are summarized below:
Broad-spectrum designation: Sunscreens will have to pass FDA’s broad-spectrum test to be labeled as such. This confirms the sunscreen protects against both ultraviolet A and B rays, both of which contribute to skin cancer and early skin aging.
Use claim: Only broad-spectrum sunscreens with an SPF of 15 or higher can claim to reduce skin cancer risk and early skin aging if used as directed. Sunscreens with SPFs between 2 and 14 can claim only to help prevent sunburn.
Waterproof, sweatproof, and sunblock claims: Sunscreens will no longer be able to claim they are waterproof, sweat-proof, or “sunblock,” since those claims over-exaggerate their effectiveness. No sunscreen is waterproof or sweat-proof without the proper reapplication. Also, sunscreens do not “block” the sun; they reduce the penetration of the ultraviolet rays.
Water-resistance claims: Any sunscreen with a “water-resistant” label must indicate whether it is effective for 40 or 80 minutes while swimming or sweating.
Drug facts: All sunscreens must include standard drug-facts information on the label.
With the summer weather here to stay for a few months, HPRC wants to remind you of the dangers of heat illness and the importance of staying hydrated. This information can relate to any outdoor activity such as exercising, hiking, bike riding, or playing in the park.
HPRC has tips on preventing heat-related illness and various guidelines for avoiding heat injuries. Hydration is an important factor for keeping you and your loved ones happy and healthy. Children need to be careful as well since they seem to have an infinite amount of energy while playing outside. In addition to water, sports drinks can also be beneficial. Keep this information in mind while you are out and about with your friends, family, and pets. Happy Summer!
One Shot One Kill: Want to learn how the elite warrior accomplishes optimal performance time after time, under the most challenging conditions? The HPRC now has new program materials for the One Shot One Kill (OSOK) performance enhancement program online for you to use and download—by yourself or with your unit! One Shot One Kill (Integrative Platform version) is a “warrior-centric” performance enhancement program that warriors can set up and manage on their own. OSOK-IP is designed to enhance performance, hardiness, and resilience. By building on the skills that Warfighters already possess, OSOK aims to translate good Warfighter qualities to outstanding ones. OSOK-IP comes in two versions:
OSOK-IP Solo is a step-by-step integrative training plan, with supplemental materials, that enables the individual Warfighter to pursue this method of Total Fitness on his or her own and reach the optimal level of performance in almost all areas of life.
OSOK-IP Train the Trainer enables your unit to train as a group by selecting one member to learn and present OSOK-IP to the rest of the unit. This section of the website has the full curriculum available to download and even customize OSOK-IP content for your own military culture and unit.
We look forward to your feedback, too. Check out OSOK and let us know what you think!
If you exercise in the cold, consider these tips from the American Council of Exercise (ACE; Exercising in the Cold) to stay safe. Check how cold it is before you go out, and do not exercise if the conditions are too extreme. Be sure to dress warmly (keep your head, hands, and feet warm) and dress in layers that can trap insulating dry air near your skin. In addition, avoid blowing air into your gloves and mittens because it will add moisture, which will cause your hands to be colder. For more detailed information, you can read the original American College of Sports Medicine position stand: prevention of cold injuries during exercise.
The ArmyTimes reported that due to this summer’s excessive heat wave, which affected most of the United States, the Army’s physical training has been impacted by two heat-related deaths and several cases of soldiers who became ill in the heat and sought medical treatment for heat injuries. According to the article, Army officials are looking for better ways to handle the heat and keep soldiers from succumbing to it.
Heat injuries can be a cause of both illness and fatalities. The Environment: Heat section of HPRC’s website provides valuable information on policies, reports, and guidelines for surviving and performing in hot environments.