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: Physical Fitness
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.
Water/pool workouts and swimming are great ways to give aching joints a break or recover from an injury and still get in a good workout. Exercising in the water provides the same aerobic fitness benefits as exercising on land. In fact, exercising in water may be less work for your heart; it pumps out more blood per beat, and heart rates are slightly slower. What’s more, pressure from the water speeds blood flow back to your heart, where your blood gets the oxygen that your muscles need during exercise.
Aquatic exercise is great for most people, including older and younger folks. Consider jumping in a pool to reduce stress and the risk for overuse injuries and as an alternative to your usual exercise routine.
The Marine Corps recently announced that as of January 1, 2014, all women must perform pull-ups as a part of their physical fitness test. A one-year transition period started January 1, 2013, to give Marines time to adjust to the new standards. Women will have to perform at least three pull-ups to pass, while eight pull-ups will earn maximum points. Training programs have already been put in place for women to improve their upper-body strength and pull-up technique. These strength-training programs will benefit any Warfighter or individual who wants to increase upper body strength. If you’re looking to shake up—or “pull up”—your resistance-training routine, give suspension training a try. It’s popular in the military because of its practicality—it requires little equipment and can be performed almost anywhere.
Check out HPRC’s Performance Strategies on developing muscular strength.
Military servicewomen are exempt from physical fitness tests for a minimum of six months after giving birth. For many, though, this may not be enough time to get back to pre-pregnancy fitness levels. To date, studies have found that after pregnancy many active-duty women had slower run times, were not able to do as many push-ups, and had lower overall fitness scores compared to their pre-pregnancy fitness tests. One Air Force study found that sit-ups were the only component of the fitness test that didn’t change after pregnancy, despite increases in abdominal circumference. While exercise is generally recommended for women during pregnancy, there are many reasons why a lot of women stop, decrease, or are unable to do physical training during this time—having a baby is exhausting! Lack of sleep and sleep disturbances, quality and quantity of family support systems, breastfeeding needs, hormonal changes, and the physical stress of childbirth all impact recovery and performance. Getting back into an exercise routine takes time and patience. Discuss any possible restrictions with your doctor before starting. Begin slowly and at lower intensities until you feel stronger. Brisk walking, especially with your baby, is good exercise and good bonding time.
Attention, sailors! The first cycle of PFAs in 2013 is just around the corner. Don’t wait until the last minute to begin your training—postponing conditioning can lead to poor performance and even injury. Spring PFAs are typically conducted in May, so there’s still time to prepare for peak physical fitness. There are several resources you can refer to in case you’re not sure where to start. For more information on the Navy’s Physical Readiness Program—including guidelines, failure process, and assessment tables—refer to OPNAVINST 6110.1J. The Navy also provides sample workouts and the NOFFS app to help you with your training plan.
Hiking is a great form of exercise and a great way to get outdoors and enjoy some scenery—especially when getting ready for deployment to challenging terrain. If the weather outside is less than ideal, however, or the winter temperatures become too frigid, you may need to move your hiking indoors to a treadmill. Keep in mind that you might not be working as hard on a treadmill as you would be hiking outside at your regular pace. Hiking requires different, often heavier footwear and involves a more diverse, varied terrain, both of which require more energy than walking in sneakers on a treadmill. If you want the same benefits, your treadmill needs to be set to at least a 3% incline for any speed up to 3.1 miles per hour to be comparable to what you expend hiking outside. You can still train for that mountain trek in bad weather—you’ll just need to make some slight adjustments. Happy trails…or treadmilling!
Approximately 300 million people around the world have sickle cell trait (SCT), including approximately 9% of African Americans. It is a hereditary condition in which red blood cells are affected, but most people who have it never experience symptoms. (It is important to note that SCT is not the same as sickle cell disease [SCD]. Sickle cell disease [or sickle cell anemia] can lead to other serious clinical risks and can cause severe symptoms. Those with the SCD usually have a shorter lifespan.)
Individuals with SCT usually can participate in normal physical activity and sports, as SCT doesn’t seem to adversely affect performance. In fact, some studies have found that those with SCT excel in short-distance power activities such as sprinting and jumping.
While SCT is largely a benign condition, there have been related complications such as exertional rhabdomyolysis and exercise-related sudden death. They have been found in non-SCT individuals as well, but they occur at higher rates in those with SCT and are a “hot topic” in military, and civilian communities; the National Collegiate Athletic Association even requires screening for all its Division I and II athletes.
It has been suggested that those with SCT may be more prone to sudden death from dehydration, heat illness, and high-intensity exercise; however, these factors and the role of prevention standards, medications, and the use of dietary supplements are still being studied. In both military and civilian SCT populations, collapsing during exercise is most commonly observed during times runs and sprints within the first few weeks of conditioning. SCT Recruits who have difficulty passing the Physical Readiness Test are also at higher risk for collapse. Military leaders should be aware of safe training guidelines and take universal precautions. Effective prevention tactics include heat acclimatization, hydration, gradual physical conditioning, and addressing progressively worse symptoms early on.
All newborns in the United States are screened for both SCT and SCD as part of a public health imperative. Each military branch has its own policies regarding SCT. The Army does not screen for SCT but promotes universal precautions for all soldiers, whereas the Air Force, Navy, and Marines all screen for SCT after accession. Further testing and counseling may be done for those who are positive for SCT. If you are unsure about SCT and exercise, consult with your physician, especially if you are starting a new exercise routine.
The USDA’s SuperTracker is an interactive, online tool that will help you set personal fitness goals as well as log and track your exercise habits and progress. Create a personal profile to manage your weight, record your fitness activities, and keep a food diary. SuperTracker offers tips, support, and detailed feedback to keep you on a healthy path in 2013 and beyond. Start the New Year off on the right foot—and then the left foot, and then the right foot again!
Individuals who have incorporated the recommendation of 10,000 steps a day into their lives have seen positive changes in their health, including weight loss, lower blood pressure, decreased risk for diabetes, lower cholesterol, and better psychological health. Many organizations, including the American Heart Association, recommend walking 10,000 steps—or approximately five miles—a day for optimal health. Having a goal of 10,000 steps will get you, your family, and friends moving more every day, which reduces health risks.
A pedometer is an easy way to start counting your steps! Turn it into a fun, inexpensive challenge for your family or colleagues—see who can get the most steps in a day or week. It might be harder than you think. Here are some tips from the American Heart Association to help you get to 10,000.
If you exercise regularly—or plan to start an exercise program—chances are you’ll experience shin splits at least once. That sharp, achy, sore, and/or throbbing feeling that runs down the front of your shin, also known as “tibial stress syndrome,” is a common condition among athletes, especially runners. The pain of shin splits can come from any number of underlying causes, such as overuse injuries, “flat feet,” or a more serious injury—stress fractures—usually from excessive and/or repetitive force on your legs. Usually shin splits will heal on their own with rest and basic self-care treatments, but it’s important to recognize the symptoms early on and to give yourself time to fully heal before easing back into your usual workout. See a doctor if the pain does not seem to improve with rest, if your shin is hot and inflamed, or if the swelling gets worse. To prevent shin splits, make sure that you wear the appropriate shoes for your type of foot, warm up before working out, vary the types of surfaces you run on, and address symptoms of pain early.