ALLERGY, RESPIRATORY
Air Quality Better in Northeast, Midwest
Folic Acid Might Offer Allergy Relief
Know Your Asthma Triggers
ALTERNATIVE MEDICINE
Meditation May Boost Short-Term Visual Memory
Holistic Treatment for Candida Infection
Memory Loss Help from Brain Supplement Prevagen
ANIMAL CARE
'Comfort Dogs' Come to Emotional Rescue
Separation Anxiety, Canine-Style
Safe Toys for Dogs
BONES & JOINTS
Most Women With Osteoporosis Unaware of Raised Fracture Risk
Human Ancestors Put Best Foot Forward 1.5M Years Ago
Scientists Discover How Osteoarthritis Destroys Cartilage
CANCER
Hypnosis Cuts Hot Flashes for Breast Cancer Survivors
Yoga May Bring Calm to Breast Cancer Treatment
Smokeout '08: The Perfect Time to Quit
CAREGIVING
Tiniest Babies Carry Biggest Costs
Undoing the 'Big Baby' Trend
Acute Respiratory Distress Syndrome as Deadly as Ever
CIRCULATORY SYSTEM
Secondhand Smoke Quickly Affects Blood Vessels
Anemia Rates Down for U.S. Women and Children
Vitamins Do Older Women Little Good
COSMETIC
New Genetic Links to Baldness Discovered
Wrinkle Fillers Need Better Label Warnings: FDA Panel
The Acne Drug Accutane More Than Doubles Depression Risk
DENTAL, ORAL
Scientists Find Gene for Tooth Enamel
Acid Drinks Blamed for Increase in Tooth Erosion
Amino Acid May Be Key to Strong Teeth
DIABETES
Fructose-Sweetened Drinks Up Metabolic Syndrome Risk
Study Shows Turmeric May Prevent Type 2 Diabetes
Fish Twice a Week Cuts Diabetics' Kidney Risks
DIET, NUTRITION
Successful Weight Loss Shows Unique Brain Patterns
10 Beginner Tips for Fast Weight Loss, the Low-Carb Way!
Lose Weight, Sleep Apnea May Improve
DISABILITIES
Review Finds Marijuana May Help MS Patients
Could Your Cell Phone Help Shield You From Alzheimer's?
ENVIRONMENTAL HEALTH
Database Helps Assess Your Breast Cancer Risk
Skin Woes Take Toll on U.S. Combat Troops
Meat-Eating Dinosaurs Used Legs and Arms Like Birds
EYE CARE, VISION
Antioxidant-Rich Diet May Protect Against Eye Disease
Autistic Children Make Limited Eye Contact
Diabetic Eye Disease Rates Soaring
FITNESS
Early Exercise Boosts Outcomes for ICU Patients
Eating Well And Keeping Active As You Grow Old Will Help You Stay Sharp
School Phys. Ed. Injuries Up 150 Percent
GASTROINTESTINAL PROBLEMS
Japanese Herbals May Ease Gastro Woes
Traditional Nonsurgical GERD Treatments Not Impressive
Olive Oil May Protect Against Bowel Disease
GENERAL HEALTH
Brisk Walk Can Help Leave Common Cold Behind
Bacterial Infections May Succumb to Honey
Deployment Takes Toll on Army Wives
HEAD & NECK
Ski Helmets Encouraged for All
Zen May Thicken Brain, Thwart Pain
Many Children Will Outgrow Headaches
HEALTH & TECHNOLOGY
Subway Defibrillators Save Lives
Magnet Therapy May Ease Hard-to-Treat Depression
Combating Myths About Seasonal Allergies
HEARING
Summer Sounds Can Lead to Hearing Loss
Noise Hurts Men's Hearing More, Study Shows
HEART & CARDIOVASCULAR
Ginkgo Won't Prevent Heart Attack, Stroke in Elderly
Obese People Seem to Do Better With Heart Disease
Whole Grains Lower Risk of Heart Failure
INFECTIOUS DISEASE
Older Adults May Have Some Immunity to Swine Flu
Swine Flu Closes Three Schools in NYC
Swine Flu Now Reported in All 50 States
INFERTILITY
Obesity May Affect Fertility in Young Womene
KID'S HEALTH
Obese Children More Likely to Suffer Lower Body Injuries
Breast-Feeding May Protect a Woman's Heart
Even Young Kids Can Learn CPR
MEN'S HEALTH
Exercise May Prevent Prostate Cancer: Study Shows
Drinking Green Tea May Slow Prostate Cancer
Eating Fast Until Full Triples Overweight Risk
MENTAL HEALTH
Fear Response May Stem From Protein in Brain
Love Hormone May Ease Discussion of Painful Topics
Music Soothes Anxiety as Well as Massage Does
PAIN
Tai Chi May Help Ease Fibromyalgia
Are We Exercising Pain Away? Not So Much.
'Cell Phone Elbow' -- A New Ill for the Wired Age
PHYSICAL THERAPY
PREGNANCY
Pregnant Women Exposed To Certain Pollutants Could Lower Childs IQ
Pre-Pregnancy Weight Linked to Babies' Heart Problems
Expectant Mom's Exercise Keeps Newborn's Birth Weight Down
SENIORS
Community Exercise Programs Boost Seniors' Strength
Martial Arts Training May Save Seniors' Hips
As You Age, Better Health Means Better Sex
SEXUAL HEALTH
SLEEP DISORDERS
Better Sleep, Grades Seem to Go Up
Moderate Aerobics May Ease Insomnia Symptoms
Sleeping Could Help Women Lose The Baby Fat
WOMEN'S HEALTH
Iodine in Prenatal Vitamins Varies Widely
A Brisk Pace May Keep Stroke at Bay
Exercise As Well As Acupuncture, May Ease Polycystic Ovarian Syndrome
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Air Pollution Slows Women's Marathon Times

Running a marathon is challenging enough, but now new research shows that the performance of female marathoners can be hindered by a certain type of air pollution.

Researchers analyzed marathon race results, weather data and air pollution concentrations in seven major U.S. marathons over a period of eight to 28 years. They found that higher levels of air pollution particles were associated with slower finish times for women. Air pollution levels didn't appear to have a significant impact on men, the study authors noted.

"Although pollution levels in these marathons rarely exceeded national standards for air quality, performance was still affected," study author Linsey Marr said in a news release from the American College of Sports Medicine.

That's because of marathoners' breathing patterns, Marr explained.

"Previous research has shown that during a race, marathon runners inhale and exhale about the same volume of air as a sedentary person would over the course of two full days. Therefore, runners are exposed to much greater amounts of pollutants than under typical breathing conditions," Marr said.

The researchers looked at a number of other air pollution components -- such as carbon monoxide, ozone, nitrogen dioxide and sulfur dioxide -- but found that only particulate matter affected the performance of female marathoners.

The study findings are published in the March issue of the journal Medicine & Science in Sports & Exercise.