ALLERGY, RESPIRATORY
Air Pollution May Raise Blood Pressure
Air Quality Better in Northeast, Midwest
Traffic, Dust Linked to Asthma in Kids
ALTERNATIVE MEDICINE
Grapefruit Compound Inhibits Hepatitis C Virus
Pain-Relieving Powers of Acupuncture Unclear
Garlic Yields Up Its Health Secret
ANIMAL CARE
Beware of Dog Bites
'Comfort Dogs' Come to Emotional Rescue
Rest Easy. When It Comes to Swine Flu, Your Pet Is Safe
BONES & JOINTS
Yoga Can Ease Lower Back Pain
New Clues to How Fish Oils Help Arthritis Patients
Most Kids With Type 1 Diabetes Lack Vitamin D
CANCER
Selenium, Omega-3s May Stave Off Colorectal Cancer
Red Meat No No No But Oily Fish Yes Yes Yes
Multiple Screening Strategy Boosts Cervical Cancer Detection
CAREGIVING
U.S. Mental Health Spending Rises, But Many Still Left Out
3 Steps Might Help Stop MRSA's Spread
Mom's Smoking May Lead to SIDS
CIRCULATORY SYSTEM
Smog Tougher on the Obese
Migraines in Pregnancy Boost Vascular Risks
Potassium-Rich Foods May Cut Stroke, Heart Disease Risk
COSMETIC
Mouse Study Finds Molecule That Tells Hair to Grow
Gum Chewing May Cut Craving for Snacks
Get Sugared!.... Its a sweet choice for hair removal
DENTAL, ORAL
Holistic Dentistry-My View
Study Links Osteoporosis Drugs to Jaw Trouble
Health Tip: At Risk for Gingivitis
DIABETES
Findings Challenge Tight Glucose Control for Critically Ill Patients
Insulin Resistance Tied to Peripheral Artery Disease
Brown Rice Bests White for Diabetes Prevention
DIET, NUTRITION
Low-Fat Diet Does Little to Alter Cholesterol Levels
Many Kids Don't Need the Vitamins They're Taking
Fatty Acid in Olive Oil Wards Off Hunger
DISABILITIES
Could Your Cell Phone Help Shield You From Alzheimer's?
Review Finds Marijuana May Help MS Patients
ENVIRONMENTAL HEALTH
Lead Exposure in Childhood Linked to Criminal Behavior Later
Global Warming Linked to Heightened Kidney Stone Risk
Most Mt. Everest Deaths Occur Near Summit During Descent
EYE CARE, VISION
FDA Goes After Unapproved Eye Washes, Skin Ointments
Contact Lens Cases Often Contaminated
Cases of Age-Related Farsightedness to Soar
FITNESS
Barefoot Best for Running?
Tai Chi: An Ideal Exercise for Many People with Diabetes
Be Healthy, Spend Less
GASTROINTESTINAL PROBLEMS
New Yogurt May Ease Stomach Ulcers
Soothing Imagery May Help Rid Some Kids of Stomach Pain
Japanese Herbals May Ease Gastro Woes
GENERAL HEALTH
'Soda Tax' Wins Health Experts' Support
'Cell Phone Elbow' -- A New Ill for the Wired Age
Most Women Struggle With Rising Health Care Costs
HEAD & NECK
Ski Helmets Encouraged for All
Zen May Thicken Brain, Thwart Pain
Many Children Will Outgrow Headaches
HEALTH & TECHNOLOGY
Airport Full Body Scanners Pose No Health Threat: Experts
'Cell Phone Elbow' -- A New Ill for the Wired Age
The Internet Is Becoming One-Stop Shopping for Health Help
HEARING
Noise Hurts Men's Hearing More, Study Shows
Summer Sounds Can Lead to Hearing Loss
HEART & CARDIOVASCULAR
More Steps a Day Lead to Better Health
Kids With Vitamin D Deficiency Linked to Heart Trouble
Cocoa in Chocolate May Be Good for the Heart
INFECTIOUS DISEASE
Older Adults May Have Some Immunity to Swine Flu
The HPV Vaccine: Preventative Medicine or Human Sacrifice?
Surgical Masks Could Prevent Flu, Maybe
INFERTILITY
Obesity May Affect Fertility in Young Womene
KID'S HEALTH
Soothing Imagery May Help Rid Some Kids of Stomach Pain
Backpack Safety Should Be on Back-to-School Lists
Music May Temper Pain in Preemies
MEN'S HEALTH
Could Chinese Herb Be a Natural Viagra?
Vigorous Exercise Cuts Stroke Risk for Men, Not Women
Drinking Green Tea May Slow Prostate Cancer
MENTAL HEALTH
Breast-Fed Baby May Mean Better Behaved Child
The Unmedicated Mind
Positive Brain Changes Seen After Body-Mind Meditation
PAIN
'Cell Phone Elbow' -- A New Ill for the Wired Age
Are We Exercising Pain Away? Not So Much.
Acupuncture, Real or Fake, Eases Back Pain
PHYSICAL THERAPY
PREGNANCY
Music of Mozart Soothes the Preemie Baby
For Baby and Mom Alike, Breast-Feeding May Be Best
Acupuncture May Ease Depression During Pregnancy
SENIORS
Memory Loss Help from Brain Supplement Prevagen
Rapid Weight Loss in Seniors Signals Higher Dementia Risk
For Older Walkers, Faster Is Better
SEXUAL HEALTH
SLEEP DISORDERS
Daylight Savings: Not a Bright Time for All
6 to 8 Hours of Shut-Eye Is Optimal for Health
Exercising Throat Muscles May Relieve Sleep Apnea
WOMEN'S HEALTH
Natural Oils Help Lower Body Fat For Some
Caffeine in Pregnancy Associated With Low Birth Weight Risk
Sugary Colas Tied to Gestational Diabetes
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Weak Muscles May Cause 'Runner's Knee'

(HealthDay News) -- Weak muscles may be the cause of the painful and debilitating condition known as "runner's knee," new research suggests.

People who develop the condition tend to have "weaker quads and hamstrings," study co-author Darin Padua, said in a news release. "As a result, they don't bend their knees as much when doing tasks, such as running or jumping. That means the contact area between the kneecap and the femur is smaller, so pressure is focused and pinpointed on a smaller area."

That, in turn, leads to runner's knee, also known as patellofemoral pain syndrome, said Padua, an associate professor of exercise and sport science at the University of North Carolina at Chapel Hill. Runner's knee, which affects an estimated one in four people who are physically active, can lead to osteoarthritis.

The research appears to be the first of its kind to study athletes both before and after they develop runner's knee, Padua said.

The researchers studied nearly 1,600 midshipmen from the U.S. Naval Academy. Of those, 40 people -- 24 women and 16 men -- developed runner's knee over several years.

The study authors noted that those with weaker hamstring and quadriceps muscles, a larger "navicular drop" (flattening of arches in the foot) and less flexible knees were several times more likely to develop the condition.

The findings appear in the November issue of the American Journal of Sports Medicine.

SOURCES: University of North Carolina at Chapel Hill, news release, Nov. 23, 2009 Published on: December 01, 2009