Stressing Fitness

Middle-age men and women who have cardiovascular issues, such as high cholesterol and high blood pressure, may not only be at risk for heart disease, but for an increased risk of developing early cognitive and memory problems as well. That's according to a study released Feb. 21 that will be presented at the American Academy of Neurology's 63rd Annual Meeting in Honolulu April 9 to April 16, 2011.

For the study, 3,486 men and 1,341 women with an average age of 55 underwent cognitive tests three times over 10 years. The tests measured reasoning, memory, fluency and vocabulary. Participants received a Framingham risk score that is used to predict 10-year risk of a cardiovascular event. It is based on age, sex, HDL cholesterol, total cholesterol, systolic blood pressure and whether they smoked or had diabetes. The study found people who had higher cardiovascular risk were more likely to have lower cognitive function and a faster rate of overall cognitive decline compared to those with the lowest risk of heart disease. A 10-percent higher cardiovascular risk was associated with poorer cognitive test scores in all areas except reasoning for men and fluency for women. For example, a 10 percent higher cardiovascular risk was associated with a 2.8 percent lower score in the test of memory for men and a 7.1 percent lower score in the memory test for women. Higher cardiovascular risk was also associated with a 10-year faster rate of overall cognitive decline in both men and women compared to those with lower cardiovascular risk.

London’s original pledge evolved into a plan to get one million more people around England playing sports three or more times a week for at least 30 minutes at a time, known as the 3x30 plan. Even that target is proving elusive. Figures issued in December by Sport England, the governing body for community sports, indicated that participation at the 3x30 level had increased by 123,000 since 2007-8, when the one million baseline was established. But that number increased by only 8,000 in the last year. At the current rate, the goal of one million new participants would not be reached in 2012-13 as hoped but more than a decade later in 2023-24.

the number of adults doing zero moderate sports activity rose by nearly 300,000 from 2005, when London was awarded the Olympics, to the fall of 2010.

London is hardly the first host city to struggle with its Olympic legacy. In truth, international events like the Olympics and soccer’s World Cup leave a greater discernible impact on infrastructure than on sports. Roads, airports and rail systems are improved while a number of stadiums become white elephants and lingering sporting benefits remain indistinct. Six years after Albertville, France, hosted the 1992 Winter Olympics, the figure-skating arena and speed-skating oval there were fenced off and abandoned. The magnificent Olympic stadium showcased during the 2008 Beijing Games, known as the Bird’s Nest, was seldom being used a year and a half later.

That's the idea behind this year's "Be Healthy Delaware: Get Up & Move!" fitness challenge, presented by the Delaware Center for Health Promotion and The News Journal. The goal is for participants to log 150 minutes of moderate physical activity a week for 10 weeks. Collectively, the goal is 5 million minutes in motion.All types of activities will be considered -- and encouraged -- including walking, running, biking, swimming, dancing, basketball, tennis, hiking, indoor rock climbing, even mowing the lawn. The key is to find activities that will get you moving."We're trying to get away from that word 'exercise' because it connotes some negative thoughts -- that you have to be athletic, super fit, young," said Marianne Carter, a registered dietitian and director of the Delaware Center for Health Promotion at Delaware State University in Dover. "People do have set ways of thinking when they hear the word 'exercise,' so using the term 'movement' tends to be friendlier."

A growing body of research shows that working out with weights has health benefits beyond simply bulking up one's muscles and strengthening bones. Studies are finding that more lean muscle mass may allow kidney dialysis patients to live longer, give older people better cognitive function, reduce depression, boost good cholesterol, lessen the swelling and discomfort of lymphedema after breast cancer and help lower the risk of diabetes. "Muscle is our largest metabolically active organ, and that's the backdrop that people usually forget," said Kent Adams, director of the exercise physiology lab at Cal State Monterey Bay. Strengthening the muscles "has a ripple effect throughout the body on things like metabolic syndrome and obesity."

Strength training often takes a back seat to cardiovascular training, but it can benefit the heart in ways that its more popular cousin can't. During cardio exercise, the heart loads up with blood and pumps it out to the rest of the body: As a result, Potteiger said, "the heart gets better and more efficient at pumping." But during resistance training, muscles generate more force than they do during endurance exercises, and the heart is no exception, Potteiger said. During a strength workout, the heart's muscle tissue contracts forcefully to push the blood out. Like all muscles, stress causes small tears in the muscle fibers. When the body repairs those tears, muscles grow. The result is a stronger heart, not just one that's more efficient at pumping. Another big advantage of working out with weights is improving glucose metabolism, which can reduce the risk of diabetes. Strength training boosts the number of proteins that take glucose out of the blood and transport it into the skeletal muscle, giving the muscles more energy and lowering overall blood-glucose levels. "If you have uncontrolled glucose levels," Potteiger said, "that can lead to kidney damage, damage to the circulatory system and loss of eyesight."

The brain may get a boost from the body's extra muscle as well. A 2010 study in Archives of Internal Medicine found that women ages 65 to 75 who did resistance training sessions once or twice a week over the course of a year improved their cognitive performance, while those who focused on balance and tone training declined slightly. One reason for the improvement, researchers believe, may be that strength training triggers the production of a protein beneficial for brain growth.

Every minute, there's a death due to cardiovascular disease in women, says Gregg Fonarow, director of the Ahmanson-UCLA Cardiomyopathy Center at the David Geffen School of Medicine at UCLA, who was not an author."This constitutes 422,000 deaths a year — more than cancer, respiratory disease, Alzheimer's and accidents combined," Fonarow says.The guidelines recommend that women:•Avoid smoking and exposure to environmental smoke.•Be physically active, getting 150 minutes a week of moderate exercise or 75 minutes a week of vigorous exercise.•Establish a comprehensive risk-reduction regime if diagnosed with heart disease or have a heart event.•Achieve a healthy body weight.•Eat a diet rich in fruits and vegetables; choose whole-grain, high-fiber foods; eat oily fish at least twice a week; limit saturated fat, cholesterol and sugar; avoid trans-fatty acids.•Consume omega-3 fatty acids by eating fish, or in capsule form if they have high cholesterol.

The payoff for investing in public parks and recreation sites may be healthier, more physically fit residents and a less strained health care system, according to Penn State researchers. Investments in parks and recreational services have a dramatic effect on health and fitness

spending an extra $10 per person on park and recreational facilities provided more vigorous exercise for girls and better strength-building for both sexes

there was an increase of 17 more minutes of physical activity for each park within a half mile of a home

A memory center in the brain called the hippocampus shrinks a little bit each year with age, but older adults who walked routinely for a year actually gained hippocampus volume, researchers report in a study to appear in the Proceedings of the National Academy of Sciences.

In the study, 60 adults aged 55 to 80 scaled up gradually until they walked for 40 minutes three times a week, enough to get their heart rates up. Sixty other participants did toning workouts that included weight training, yoga sessions and stretching for the same amount of time. After a year of toning, a part of these subjects’ brains called the anterior hippocampus lost a little over 1 percent of its volume. In contrast, a year of aerobic exercise led to about a 2 percent increase in anterior hippocampus volume. Study participants who got their heart rates up performed slightly better on a memory test and had higher levels of a brain-aiding molecule called BDNF, the researchers found.

Want to run a 3:30 marathon? Then train to run a bunch of 800s in 3:30 each. Between the 800s, jog for the same number of minutes it took you to run your repeats. Training doesn't get any simpler than this, not on this planet or anywhere else in the solar system. Bart begins running his Yasso 800s a couple of months before his goal marathon. The first week he does four. On each subsequent week, he adds one more until he reaches 10. The last workout of Yasso 800s should be completed at least 10 days before your marathon, and 14 to 17 days would probably be better. The rest of the time, just do your normal marathon training, paying special attention to weekend long runs. Give yourself plenty of easy runs and maybe a day or two off during the week.

If I can get my 800s down to 2 minutes 50 seconds, I'm in 2:50 marathon shape. If I can get down to 2:40 (minuses), I can run a 2:40 marathon. I'm shooting for a 2:37 marathon right now, so I'm running my 800s in 2:37."

Studies are finding that more lean muscle mass may allow kidney dialysis patients to live longer, give older people better cognitive function, reduce depression, boost good cholesterol, lessen the swelling and discomfort of lymphedema after breast cancer and help lower the risk of diabetes.

During a strength workout, the heart's muscle tissue contracts forcefully to push the blood out. Like all muscles, stress causes small tears in the muscle fibers. When the body repairs those tears, muscles grow. The result is a stronger heart, not just one that's more efficient at pumping. Another big advantage of working out with weights is improving glucose metabolism, which can reduce the risk of diabetes. Strength training boosts the number of proteins that take glucose out of the blood and transport it into the skeletal muscle, giving the muscles more energy and lowering overall blood-glucose levels.

A 2010 study in the Clinical Journal of the American Society of Nephrology suggested that people on dialysis can benefit from building muscle. Researchers found that kidney dialysis patients who had the most lean muscle mass — a measurement derived from the circumference of the mid-arm muscle — were 37% less likely to die than the patients who had the least.

Researchers at Oregon Health and Science University scanned the brains of nine healthy, normal-weight  subjects in the minutes after each got an infusion of equal volumes of glucose, of fructose and of saline. The brain scans aimed to capture activity in a relatively small swath of the human brain in and around the hypothalamus, which plays a key but complex role in setting appetite levels and directing production of metabolic hormones. The researchers, led by Dr. John Purnell, found that "cortical control areas"--broad swaths of gray matter that surrounded the hypothalamus -- responded quite differently to the infusion of fructose than they did to glucose. Across the limited regions of the brain they scanned, Purnell and his colleagues saw that glucose significantly raised the level of neural activity for about 20 minutes following the infusion. Fructose had the opposite effect, causing activity in the same areas to drop and stay low for 20 minutes after the infusion. Saline--the control condition in this trial--had no effect either way.

“Exercise is a form of stress,” she pointed out. So is social isolation. Each, independently, induces the release of stress hormones (primarily corticosterone in rodents and cortisol in people). These hormones have been found, in multiple studies, to reduce neurogenesis. Except after exercise; then, despite increased levels of the hormones, neurogenesis booms. It’s possible, Dr. Stranahan said, that social connections provide a physiological buffer, a calming, that helps neurogenesis to proceed despite the stressful nature of exercise. Social isolation removes that protection and simultaneously pumps more stress hormones into the system, blunting exercise’s positive effects on brainpower.

n any given day participants with both depression and heart disease were nearly five times more likely to die than their healthy peers. Depression alone doubled mortality risk, and heart disease increased risk by only two thirds.

at least 20 percent of the 17 million Americans with heart disease also suffer from depression

According to the American Psychological Association, a whopping 75 percent of people in the United States feel stressed out. Almost half of us eat unhealthy because of it; 47 percent of us can't sleep because of it; it makes one in three of us depressed; and for 42 percent of us, it has gotten worse in the last year. There is so much making us anxious these days -- from big-picture problems like uncontrollable oil spills and a still-soft economy to garden-variety job, relationship, money, you-name-it woes -- that it's easy to think of chronic stress as the new normal.

the latest research reveals that revving up your body with exercise may be the most effective antidote. In lab studies, when scientists at Princeton put animals on a six-week aerobic conditioning program, then compared their brain cells with those of a group that remained sedentary, they found that the "brains on exercise" morphed over time into a biochemically calm state that remained steady even when the subjects were under stress. The nonexercising group's brain cells continued to react strongly to anxiety-inducing situations. This breakthrough discovery has scientists now saying that cardio workouts may actually remodel the brain to make it more resistant to stress hormones.

The emotional health of college freshmen — who feel buffeted by the recession and stressed by the pressures of high school — has declined to the lowest level since an annual survey of incoming students started collecting data 25 years ago. In the survey, “The American Freshman: National Norms Fall 2010,” involving more than 200,000 incoming full-time students at four-year colleges, the percentage of students rating themselves as “below average” in emotional health rose. Meanwhile, the percentage of students who said their emotional health was above average fell to 52 percent. It was 64 percent in 1985. Every year, women had a less positive view of their emotional health than men, and that gap has widened.