ALLERGY, RESPIRATORY
Keep Asthma, Allergies at Bay for the Holidays
Childhood Food Allergies on the Rise
Overweight Moms More Likely to Have Asthmatic Kids
ALTERNATIVE MEDICINE
Wristbands May Lessen Nausea After Radiation
Ginger Can Ease Nausea From Chemotherapy Treatments
Grapefruit Compound Inhibits Hepatitis C Virus
ANIMAL CARE
Rest Easy. When It Comes to Swine Flu, Your Pet Is Safe
Beware of Dog Bites
Safe Toys for Dogs
BONES & JOINTS
Bone Density Predicts Chances of Breast Cancer
Returning to the Road Tricky After Injury
Yoga Can Ease Lower Back Pain
CANCER
Women Smokers Lose 14.5 Years Off Life Span
Many Cancer Patients Turn to Complementary Medicine
Yoga May Bring Calm to Breast Cancer Treatment
CAREGIVING
Falls Are Top Cause of Injury, Death Among Elderly
High Rate of Rehospitalizations Costing Billions
Children's Bath Products Contain Contaminants
CIRCULATORY SYSTEM
Mercury in Fish Linked to High Blood Pressure
Smog Tougher on the Obese
Varicose Veins May Mask Larger Problem
COSMETIC
New Genetic Links to Baldness Discovered
With Psoriasis, the Internet May Offer Hope
What to Do If You Have Unsightly Veins
DENTAL, ORAL
Holistic Dentistry-My View
Toothbrushing May Stave Off Heart Woes
Most Insured Adults Worry About Health Care Costs: Poll
DIABETES
'Standard' Glucose Test May Be Wrong One for Obese Children
Findings Challenge Tight Glucose Control for Critically Ill Patients
Doctors Urged to Screen Diabetics for Sleep Apnea
DIET, NUTRITION
Coffee Drinkers Might Live Longer
Brown Rice Bests White for Diabetes Prevention
Omega-3 May Reduce Endometriosis Risk
DISABILITIES
Review Finds Marijuana May Help MS Patients
Could Your Cell Phone Help Shield You From Alzheimer's?
ENVIRONMENTAL HEALTH
Pesticides on Produce Tied to ADHD in Children
Scorpion Anti-Venom Speeds Children's Recovery
Hypertension May Hit Black Males Earlier
EYE CARE, VISION
Blood Sugar Control Helps Diabetics Preserve Sight
Kids Who Spend More Time Outdoors Have Better Vision
Don't Lose Sight of Halloween Safety
FITNESS
Daily Exercise at School Yields Rewards
Any Exercise Good After a Heart Attack
Avoiding a Holiday Season of Discontent
GASTROINTESTINAL PROBLEMS
Japanese Herbals May Ease Gastro Woes
New Guidelines Issued for Management of IBS
Gum Chewing May Speed Colon Surgery Recovery
GENERAL HEALTH
New Methods Could Speed Production of Flu Vaccines
Swine Flu Loves a Crowd
Smog Tougher on the Obese
HEAD & NECK
Zen May Thicken Brain, Thwart Pain
Ski Helmets Encouraged for All
Many Children Will Outgrow Headaches
HEALTH & TECHNOLOGY
Magnet Therapy May Ease Hard-to-Treat Depression
'Comfort Dogs' Come to Emotional Rescue
Airport Full Body Scanners Pose No Health Threat: Experts
HEARING
Noise Hurts Men's Hearing More, Study Shows
Summer Sounds Can Lead to Hearing Loss
HEART & CARDIOVASCULAR
Risk Factor for Stroke More Common Among Whites
Whole Grains Lower Risk of Heart Failure
Polyunsaturated Fats Really May Lower Heart Risk
INFECTIOUS DISEASE
Viral Infection Might Trigger High Blood Pressure
Swine Flu Is Now a Pandemic Says W.H.O.
Swine Flu Loves a Crowd
INFERTILITY
Obesity May Affect Fertility in Young Womene
KID'S HEALTH
Quick Orthopedic Repair Can Save Young Shoulders
Family Medicine Cabinet Top Source Of Kid's Poisonings
Obesity May Raise Kids' Allergy Risk
MEN'S HEALTH
Sunlight May Help Protect Men From Kidney Cancer
Countdown to Hair Loss
Could Chinese Herb Be a Natural Viagra?
MENTAL HEALTH
Musicians' Brains Tuned to Emotions in Sound
Cinnamon Breaks Up Brain Plaques, May Hold Key to Fighting Alzheimer’s
Shop 'Til You Drop: You May Feel Better
PAIN
'Cell Phone Elbow' -- A New Ill for the Wired Age
Alleviating Rheumatoid Arthritis
Are We Exercising Pain Away? Not So Much.
PHYSICAL THERAPY
PREGNANCY
Heart Defects in Newborns Linked to Antidepressants
Placebo Acupuncture Tied to Higher IVF Pregnancies
Calcium Supplements Cut Blood Lead Levels During Pregnancy
SENIORS
Nighttime Urination Linked to Higher Death Rate Among Elderly
Daily dose of beet juice promotes brain health in older adults
Fitness Fades Fast After 45
SEXUAL HEALTH
SLEEP DISORDERS
Exercising Throat Muscles May Relieve Sleep Apnea
Meditation May Help Put Primary Insomnia to Bed
Lose Weight, Sleep Apnea May Improve
WOMEN'S HEALTH
For Women, Moderate Midlife Drinking Linked to Healthier Old Age
Natural Oils Help Lower Body Fat For Some
Spice Compounds May Stem Tumor Growth
Add your Article

Exercise in Adolescence May Cut Risk of Deadly Brain Tumor

(HealthDay News) -- Exercising during adolescence may help guard against a deadly form of brain tumor in adulthood, new research suggests.

The study also found that avoiding obesity during the teen years was associated with a lower risk of developing the cancerous brain tumors called gliomas, while being tall increased the chances of such malignancies.

The study appears in the Nov. 1 issue of Cancer Research.

Gliomas are the most common type of brain and central nervous system cancers, accounting for 80 percent of cases, according to background information in the study. Gliomas cause 13,000 deaths in the United States each year.

Though little is known about why people develop the tumors or who is at risk, previous research has hinted that "early life exposures" may increase the risk of developing the cancer in adulthood, said study author Steven C. Moore, a research fellow in the Nutritional Epidemiology Branch of the U.S. National Cancer Institute. Studies have shown that people who are left-handed, for example, are at higher risk of the disease.

In the current research, Moore and his colleagues examined data on nearly 500,000 men and women aged 50 to 71 participating in the NIH-AARP Diet and Health Study, which included questionnaires on height and weight at various points during their lives.

Those who'd reported doing substantial amounts of light, moderate and vigorous exercise between the ages 15 and 18 were 36 percent less likely to develop glioma than those who were sedentary. Activities included walking, aerobics, biking, swimming, running, heavy housework or gardening.

The researchers also found that those who were obese during their teen years had a three to four times greater risk of developing glioma than those of a normal weight. Because only 11 people who developed glioma were also obese as teenagers, researchers said the finding needed to be replicated.

"The BMI [body mass index] finding is very interesting but it's hard to know what to make of it," Moore said. "It's also hard to say if it's a causal relationship or not. It could be that obesity increases the risk of brain cancer, or if could be that some underlying condition increases both the risk of obesity and brain cancer."

Neither weight nor exercise affected glioma risk beyond the teen years.

Tall people were also at increased risk of glioma. Each 10 centimeter (about 3.9 inches) increase in height meant a nearly 20 percent increase in risk of developing glioma.

The researchers said increases in glioma risk could be related to "energy balance" during a critical period of brain development. People who are tall have higher levels of the growth factor IGF-1 during childhood. Growth factors promote the proliferation of cells.

"Anything that increases the rate of proliferation of cells could potentially be a cancer risk factor," Moore said.

Dr. Paul Graham Fisher, a professor of neurology at Stanford University, said the study was "well done," but questioned why exercise and weight did not affect glioma risk beyond the teen years.

"You start scratching your head and asking, 'Why wouldn't it be true in the 20s and 30s or later?'" Fisher said. "It's possible there is some critical window in which energy balance can impact glioma genesis."

And though researchers relied on the recollections of older adults about their weight and physical activity from many decades ago, there's no reason to suspect people who were later diagnosed with glioma had any better or worse memories, or reported their height and weight with any particular bias than those who didn't develop the brain tumors.

With the risk of developing glioma so low among the general population, the findings aren't so much a prescription for teens to exercise as more information for researchers searching for the biological underpinnings of glioma in the hopes developing new treatments.

Yet it's not a bad idea to encourage teens to stay active, too, Moore said.

"At this point in time, these data are more relevant to the biology of glioma, but they provide some preliminary evidence that physical activity could be important for glioma, too," Moore said.

SOURCES: Steven C. Moore, Ph.D., research fellow, National Cancer Institute, Rockville, Md.; Paul Graham Fisher, M.D., professor, neurology, Stanford University, Palo Alto, Calif.; Nov. 1, 2009, Cancer Research