Thursday, February 17, 2011

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Exercise Improves Your Brain

Exercise Improves Your Brain

Have you made a New Year's resolution to get more exercise? Whether to improve your cardiovascular health or to help with weight control, exercise is a great plan. And now there is evidence that physical exercise can also perk up our brains.

This shouldn't be a surprise. If exercise is healthy for our hearts and lungs, then why not for our brains? And if exercise can improve brain function, then it may also be beneficial for mood, cognition, and overall mental performance.

Research studies have shown that moderately intense physical activity, and especially aerobic exercise like brisk walking and running, can lead to improvements in cognitive functions like attention, reasoning, and decision making. Experiments have compared groups of people who exercised regularly with others who did not. The improvements in brain function were most dramatic in older adults, but all ages appeared to benefit from increased physical exercise.

One recent analysis looked at the combined results of 18 different studies of the possible cognitive effects of fitness training in older adults. Although the results showed gains in all types of cognitive activity among the fitness-training groups, the greatest advances were found in the exercisers' executive functioning, which controls higher-level decision making skills like planning, scheduling, multi-tasking, and dealing with ambiguity.

We need executive functioning to be able to select appropriate social behaviors and inhibit inappropriate actions. Other types of cognitive activity include reaction time, the ability to remember or interpret visual information, and lower-level decisionmaking.

Surveys also show that people who are physically active throughout their lives are less likely to experience cognitive decline later in life. And those who exercise regularly are less likely to develop Alzheimer's disease.

Some clues may explain how physical activity can help the cognitive functioning of our brains. It has been shown, for example, that fitness training can improve blood flow in the brain and increase the number of capillaries carrying the blood.

Exercise also increases levels of neurochemicals that stimulate the interconnections among neurons. And exercise may increase the size of some areas of the brain or, at least, slow their rate of decrease as we age. Many of these changes are most prominent in the brain's frontal cortex, the area most important for executive functioning.

So remember, even modest increases in physical activity can be beneficial for your brain and for the important things that organ does for you. How much exercise is enough?

That depends on your age and health, but vigorous walking for 20 to 30 minutes a few days a week is a good start. Be sure to check with your health care provider before starting a new, rigorous exercise program.

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Home Remedies for children Cold & Cough

Home Remedies for children Cold & Cough



COLDS


The Fewer Caught, the Better
Some kids seem to have a cold brewing almost all the time, which is not surprising when you consider that approximately 200 viruses can cause the common cold. Most of these cold viruses are extremely hardy. They can survive for several hours on hands, clothing and hard surfaces as well as in the air, giving your child ample opportunity to pick up something infectious somewhere. Small wonder, then, that most kids average about six colds every year.

MEDICAL ALERT

When to See the Doctor

As long as your child has no fever and is eating and sleeping well despite her cold, there is no reason to go to the doctor, says Flavia Marino, M.D., a clinical instructor in pediatrics at New York University Medical Center, Tisch Hospital, and a pediatrician in New York City. ''However, if the symptoms worsen, if there is a low-grade fever (100° to 101°) for a few days or if the fever shoots higher, it's time for a visit to the pediatrician. Your child may have a bacterial infection rather than a cold,'' says Dr. Marino.

If your child's runny nose and cough haven't improved after ten days, your child may have a sinus infection. ''Sinusitis may follow a cold because the sinuses become inflamed and can't drain properly,'' says Michael Macknin, M.D., head of the Section of General Pediatrics at the Cleveland Clinic Foundation in Ohio, clinical professor at Pennsylvania State University Medical School in Hershey and associate professor of pediatrics at Ohio State University Medical School in Columbus.

Sinus infections are particularly common among preschoolers. ''For a child under age 6 who's had a runny nose with or without a cough for ten days and isn't getting better, chances are close to 90 percent there's a sinus infection,'' Dr. Macknin says. For 6-to 12-year-olds, chances are 70 percent. Unlike a cold virus, a sinus infection should be treated with doctor-prescribed antibiotics, he adds.


Spending seven days--more or less--soothing a child with a cold isn't most parents' idea of a good time. Before a typical cold runs its course, you'll have to deal with sniffles and sneezes, stuffiness and coughs, runny nose and scratchy throat, maybe even a low-grade fever. But it's reassuring to know that these symptoms seldom turn out to be serious.

''The vast majority of kids--even infants--do just fine with a cold,'' says Michael Macknin, M.D., head of the Section of General Pediatrics at the Cleveland Clinic Foundation in Ohio, clinical professor at Pennsylvania State University Medical School in Hershey and associate professor of pediatrics at Ohio State University Medical School in Columbus. ''It's a very common ailment that rarely causes a problem,'' he says.

That doesn't mean that you should just ignore your child's cold, however. Although there is no cure for a cold virus (antibiotics only vanquish bacterial infections, such as those that cause strep throat or ear infection), you can give your child some relief from annoying symptoms. And you may be able to prevent some colds entirely. Here's what the experts suggest.

Boost immunity by breastfeeding your baby. ''To prevent colds in infants--as best we can--it pays to breastfeed,'' notes Naomi Grobstein, M.D., a family physician in private practice in Montclair, New Jersey. ''Breastfeeding can provide extra protection against those cold viruses to which the mother has already developed an immunity,'' she says.

Go easy on the acetaminophen for fever. '' You don't have to treat a low-grade fever,'' says Dr. Grobstein. ''Fever mobilizes the immune system and helps fight off infection.'' But if you choose to treat the fever because your child is intolerably uncomfortable, use acetaminophen--Children's Tylenol or any other brand.'' she suggests. Check the package directions for the correct dosage for your child's age and weight. If your child is under age two, consult a physician. '' You should never give aspirin to your child with a virus,'' she adds, ''because it has been linked to Reye's syndrome, a serious disease that affects the brain and liver.''

Smooth something soothing on a sore nose. ''Most children are not bothered by a runny nose, except when the skin around it becomes chapped and raw from frequent wiping,'' says Flavia Marino, M.D., a clinical instructor in pediatrics at New York University Medical Center, Tisch Hospital, and a pediatrician in New York City. To prevent that, she recommends applying a layer of petroleum jelly just beneath your child's nose as often as necessary.

Ask for hand washing. ''Cold viruses are frequently transmitted through hand contact,'' says Dr. Macknin. ''So simple hand washing is the best way to prevent the spread of infection.'' And be sure your child uses soap when she washes up, he says.

Put the squeeze on excess mucus. During the first few months of life, babies have a harder time than the rest of us if they're forced to breathe through the mouth, notes Dr. Marino. ''Nasal blockage caused by a cold may make it difficult for an infant to nurse or drink from a bottle,'' she says. ''But you can make breathing easier for your baby with the help of saline (saltwater) drops and a rubber suction bulb.''
You can purchase saline solution (sold under brand names such as Ayr Saline Nasal Mist and Ocean) from a pharmacy. Or you can mix your own, dissolving ¼ teaspoon of salt in 1 cup of lukewarm water. ''Put a couple drops into your child's nose and wait a few moments,'' says Dr. Marino. ''Then squeeze the suction bulb and then insert the tip gently into one nostril. Slowly release the bulb to suction out mucus.'' After you dispose of the mucus in a tissue, repeat the procedure for the other nostril, he says. Be sure to sterilize the bulb afterward in boiling water.

Serve warm liquids. Offer your child plenty of warm drinks or soup, suggests Dr. Grobstein. '' Warm liquids help relieve congestion, and they can also soothe a sore throat,'' she says.

Mix a mild gargle. Another way to soothe a sore throat is to have your child gargle with warm water in which some salt has been dissolved, says Dr. Marino. This can be repeated several times a day, she says.

Don't squelch a daytime cough. ''Coughing is a protective mechanism that keeps bacteria and debris out of the lungs,'' says Dr. Marino. So leave the cough alone during the day. If coughing is keeping your child up at night, though, an over-the-counter cough suppressant may help him sleep, she says. ''Check with your physician for the appropriate dosage,'' says Dr. Marino, ''and schedule an office visit if the cough lingers for more than a few days or if fever persists.''

Say okay to school. ''Unless he has a fever or feels really lousy, there is no reason to make your child stay indoors or keep him home from school just because he has a cold,'' says Dr. Grobstein.

Ditch the decongestants and antihistamines. These over-the-counter cold medicines have never been proven effective for kids under the age of five, says Dr. Macknin. ''They may work, but there's not a single article in the scientific literature for the last 40 years that supports their use,'' he says.

Dr. Macknin concedes that decongestants, at least, may offer some symptomatic relief, but both types of remedies have side effects. ''Decongestants may make a child hyperactive, and antihistamines may make him sleepy,'' he says. ''And in some instances, kids may have other, more unusual or severe reactions.''

The bottom line, Dr. Macknin says, is that cold medications won't make the cold go away faster. So unless your child feels truly miserable, don't use them.

Check for stress. Studies have shown there is a link between stress and illness. '' When your child is very fatigued, worn out or under a lot a stress, she is more likely to become ill with a cold,'' Dr. Macknin says. If you discover that your child is facing a stressful situation, either at play or at school, consider what steps can be taken to relieve her concerns. Pressure at school, trouble with friends or too many activities may be contributing factors.

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