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
Tobacco use, especially in the military, is still an important health issue in this country. While the negative effects of tobacco use have been well documented, what you may not know is that there’s also a lot research about what happens when you quit smoking—and the news is good, especially if living longer is something you care about. Scientists have compiled information from these studies and have found that it’s never too late to quit, even if you have been a lifetime smoker. The military is committed to keeping its past and present service members ready and resilient. Check out HPRC’s article “Tobacco in the military: Be a quitter!” Live longer and better. Consider quitting, starting today!
There are any number of excuses for not exercising or counting calories, but not having the ability to track your progress and have it with you at all times is a dwindling one. Smartphone physical activity applications (SPAA) are growing in popularity and making it easy for users to receive information regarding their fitness and nutrition. Finding the right one for you—among thousands—may take some legwork, but the American College of Sports Medicine (ACSM) review of the different types of fitness apps can help you choose.
A recent study identified features that consumers find most valuable— apps that include goal setting and problem solving (for example, alternative exercises for when it’s raining) seem to be the most successful. Two other features that users ranked high were automatic tracking of physical activities and receiving feedback on fitness accomplishments.
A helpful application created by the Navy Operational Fitness and Fueling Series (NOFFS) is available here. Also check out HPRC’s tip on a good nutrition tracking application. Find an application that meets your needs and bring fitness with you everywhere!
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.
Strong Bonds is a chaplain-led Army initiative that helps build relationship resilience. Through education and skills training, the Strong Bonds mission is to increase soldier and family readiness. Offsite retreat-style training addresses the effects of stress on military lifestyle, with programs tailored for single soldiers, couples, and families.
Visit HPRC's Military Family Skills for more information on military-specific strategies for building relationship resilience.
June 25-29 marked the 2012 Army Drill Sergeant of the Year (DSOY) competition at Fort Eustis, Virginia. Drill sergeants are known as the cornerstone of Army readiness because they set the tone for soldiers’ entire military career. Four active-duty and two U.S. Army Reserve drill sergeants endured physical and mental challenges during the five-day competition. They were tested on their knowledge of Warrior Tasks and Battle Drills and their ability to teach these skills to new soldiers. The competition concluded with questions from a board of senior command sergeants on leadership and training.
The winning active-duty drill sergeant, Staff Sgt. Jeffrey Heilman, received the Stephen Ailes Award (named for the 1964-65 Secretary of the Army who was instrumental in originating the first Drill Sergeant School at Fort Leonard Wood, MO). The Army Reserve winner, Staff Sgt. Jared Moss, received the Ralph Haines Jr. Award (named for the 1970-72 commander of the Continental Army Command).
Watch highlights of this year’s competition!
The FOCUS (Families OverComing Under Stress) Project provides online resilience training for military families affected by deployment. The project is designed to address parents’ and children’s concerns about military-combat stress injuries and combat-related physical injuries and provide helpful strategies to build family resilience.
Parents can watch videos, download handouts, and participate in private online chats with family members. FOCUS includes resources and tools for Warfighters, spouses, and professionals—and even activities children and teens can participate in. For more information, visit HPRC's section on Military Family Workshops/Programs.
Think about this: Not getting enough sleep has a serious impact on how and what you think—your memory and concentration suffer, as do your awareness of your surroundings and your reaction time. Sleep loss affects your ability to make good decisions and puts you on edge, making you susceptible to your emotions. There’s more: Sleep loss also affects your ability to think positively and solve problems effectively. All of these are key factors in managing stress. Making good decisions now reduces your stress over the long term, and this can be compromised when you’re not at your peak. Bottom line: Focus on getting enough sleep to help you manage your stress.
For more on how to get better sleep, check out HPRC’s Mind Tactics information on sleep management. For how sleep loss affects all the areas of fitness, check out the HPRC’s Total Force Fitness article on The impact of sleep loss on total fitness.
The cool-down—a practice so engrained in our exercise habits that we assume it’s important. But, the truth is, the topic is understudied, and evidence for or against cooling down is still up for debate. What is a cool-down and what is it supposed to do? The American College of Sports Medicine (ACSM) recommends a period of low- to moderate-intensity aerobic or muscular endurance activities after exercise to gradually reduce heart rate and blood pressure and remove metabolic byproducts from the system. For some, this may be a slow jog down the street, or an easy ride around the block after a workout with the hope of also preventing delayed onset muscle soreness (DOMS). The long-standing theory behind cooling down was that it helped to remove lactic acid from the system, a substance that could later cause muscle aches and soreness. However, it is believed that DOMS is the result of minor muscle damage due to novel or intense exercise, but we do know that lactic acid is not the culprit. During cool-down—active recovery—more lactic acid is removed from the system than during passive recovery, i.e., no cool-down. But is this a good thing? In a study of cyclists, researchers found that when subjects stopped exercise abruptly, lactic acid turned into glycogen, a fuel for the muscles. But when the cyclists gradually tapered off activity, less glycogen was made, leaving less energy for the muscles. These results indicate that cooling down might not be beneficial and may waste useful energy for the muscles.
On the other hand, a cool-down lowers elevated heart rates faster than passive recovery does and may prevent post-exercise dizziness. Stopping abruptly after exercise can cause blood to pool in the dilated vessels of the legs and feet, which may lead to a feeling of light-headedness and/or dizziness. Keep in mind, however, that these symptoms can also be related to other post-exercise conditions such as low blood sugar, low blood pressure, dehydration, or even hyponatremia. If you experience these symptoms, check with your doctor to find out if there are other causes.
Scientists agree that cooling down is also beneficial for people with cardiovascular conditions and heart disease where the coronary vessels are narrowed due to atherosclerosis (fatty deposits), as blood return to the heart may be compromised without it.
ACSM currently recommends at least 5-10 minutes of cool-down, with at least 10 minutes of stretching after exercise. However, more research is needed to determine the value and ideal recommendations for cooling down. If stopping exercise abruptly causes symptoms of light-headedness and dizziness, then a cool-down is a good idea.
The U.S. Food and Drug Administration (FDA) has found violations in manufacturing practices in half of almost 450 dietary supplement companies it has inspected over the last four years, according to a Chicago Tribune article. The implications of these findings can have serious health problems for consumers. Since dietary supplement manufacturers are the ones responsible for ensuring a product is safe before it is marketed, the FDA inspects companies to check for compliance and takes action only if a product is deemed unsafe after it has been marketed. For more information, see the FDA website’s Dietary Supplements section.
Operation Supplement Safety (OPSS) will launch this summer, with answers to many of the questions you may have about Dietary Supplements. Watch for HPRC’s announcement coming soon.
The latest update of HPRC’s list of DMAA-containing dietary supplement products is now available online. The list now indicates more than 80 products that have been removed from the market or reformulated to exclude DMAA, or that no longer include DMAA in the list of ingredients on the label and/or manufacturer’s website. In addition, DMAA-containing versions of recently removed/reformulated products are likely to still be on the market until retail stocks have been depleted, so be sure to read labels carefully. However, the only way to determine if DMAA is no longer in a product is through laboratory testing.
HPRC has begun to hear from manufacturers and distributors about changes to their products to exclude DMAA. Please note that products now seem to change almost daily, while the list is updated about every six weeks. We welcome input to help us keep track of changes.