ALLERGY, RESPIRATORY
Folic Acid Might Offer Allergy Relief
Using Music and Sports to Improve Kids' Asthma
Know Your Asthma Triggers
ALTERNATIVE MEDICINE
Yoga May Bring Calm to Breast Cancer Treatment
Placebo Acupuncture Tied to Higher IVF Pregnancies
Ginger Can Ease Nausea From Chemotherapy Treatments
ANIMAL CARE
'Comfort Dogs' Come to Emotional Rescue
Separation Anxiety, Canine-Style
Safe Toys for Dogs
BONES & JOINTS
Resistance Training Boosts Mobility in Knee Arthritis Patients
Childhood Dairy Intake Boosts Bone Health Later On
A Little Drink May Be Good for Your Bones
CANCER
Physical Activity May Prolong Survival After Colon Cancer
Tanning Beds Shown To Raise Cancer Risk, Study Says
Sharing Cancer Info May Be Empowering
CAREGIVING
Undoing the 'Big Baby' Trend
Moms Who Breast-Feed Less Likely to Neglect Child
MRSA Infections Spreading to Kids in Community
CIRCULATORY SYSTEM
Secondhand Smoke Quickly Affects Blood Vessels
Firefighters Have Narrower-Than-Normal Arteries, Study Finds
Obesity Linked to Heart Failure Risk
COSMETIC
Wrinkle Fillers Need Better Label Warnings: FDA Panel
Contact Lenses Boost Kids' Self-Image
Mouse Study Finds Molecule That Tells Hair to Grow
DENTAL, ORAL
Obesity Boosts Gum Disease Risk
Amino Acid May Be Key to Strong Teeth
Gum Care Helps Control Type 2 Diabetes and Its Complications
DIABETES
Treatment for Type 2 Diabetes Updated
Older Diabetics With Depression Face Higher Death Rate
Diabetes Linked to Cognitive Problems
DIET, NUTRITION
Fruits, Vegetables, Teas May Cut Smokers' Cancer Risk
Breakfast Eggs Keep Folks on Diet
Marinades Help Keep Grilled Meat Safe
DISABILITIES
Review Finds Marijuana May Help MS Patients
Could Your Cell Phone Help Shield You From Alzheimer's?
ENVIRONMENTAL HEALTH
Exposure to 9/11 Fumes Tied to Chronic Headaches
1976 Italian Dioxin Release Damaged Babies' Thyroids
Global Warming Linked to Heightened Kidney Stone Risk
EYE CARE, VISION
Clues Found to Brain Mechanism Behind Migraines
Kids Think Glasses Make Others Look Smart, Honest
Protein Might One Day Prevent Blindness
FITNESS
Bursts of Vigorous Activity Appear to Be a 'Stress-Buffer'
Maximize Your Run
Resistance Training Boosts Mobility in Knee Arthritis Patients
GASTROINTESTINAL PROBLEMS
Gum Chewing May Speed Colon Surgery Recovery
New Guidelines Issued for Management of IBS
Bowel Prep Harder on Women Than Men
GENERAL HEALTH
What you need to know about swine flu.
Brisk Walk Can Help Leave Common Cold Behind
Meat Additives May Be Dangerous for Kidney Patients
HEAD & NECK
Zen May Thicken Brain, Thwart Pain
Many Children Will Outgrow Headaches
Ski Helmets Encouraged for All
HEALTH & TECHNOLOGY
'Cell Phone Elbow' -- A New Ill for the Wired Age
'Comfort Dogs' Come to Emotional Rescue
The Internet Is Becoming One-Stop Shopping for Health Help
HEARING
Summer Sounds Can Lead to Hearing Loss
Noise Hurts Men's Hearing More, Study Shows
HEART & CARDIOVASCULAR
More Steps a Day Lead to Better Health
Soy Protein Doesn't Lower Cholesterol
Years of Heavy Smoking Raises Heart Risks
INFECTIOUS DISEASE
Swine Flu Is Now a Pandemic Says W.H.O.
Swine Flu Now Reported in All 50 States
Surgical Masks Could Prevent Flu, Maybe
INFERTILITY
Obesity May Affect Fertility in Young Womene
KID'S HEALTH
More Calcium And Dairy Products in Childhood Could Mean Longer Life
Safety Should Be Priority for Those Involved in Kids' Sports
Babies Cared For In Others Homes Might Become Heavy Toddlers
MEN'S HEALTH
Low Iron Levels Cut Cancer Risk in Men With PAD
Whole Grains, Bran May Fight Hypertension in Men
The Dark Side of Vegetarianism
MENTAL HEALTH
The Acne Drug Accutane More Than Doubles Depression Risk
Consciousness Helps the Mind and Body Work Together
Memory Loss Help from Brain Supplement Prevagen
PHYSICAL THERAPY
PREGNANCY
Before Conceiving, Take Folic Acid for One Full Year
For Baby and Mom Alike, Breast-Feeding May Be Best
Prenatal Stress May Boost Baby's Asthma Risk
SENIORS
Exercise Benefits Even the Oldest Old
Memory Loss Help from Brain Supplement Prevagen
Healthy Diet Could Cut Alzheimer's Disease Risk
SEXUAL HEALTH
SLEEP DISORDERS
Pay Attention to Signs That Say You're Too Fatigued to Drive
Meditation May Help Put Primary Insomnia to Bed
Daylight Savings: Not a Bright Time for All
WOMEN'S HEALTH
Women Who Run May Benefit From Extra Folic Acid
Most Women With Osteoporosis Unaware of Raised Fracture Risk
Air Pollution Slows Women's Marathon Times
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Laughter Can Boost Heart Health

FRIDAY, May 29 (HealthDay News) -- New research lends weight to the old adage that laughter can be powerful medicine, particularly when it comes to your heart.

Two studies presented at the American College of Sports Medicine's annual meeting in Seattle found that laughter not only can reduce stress, which can damage the heart, it can lead to improved blood flow, which can help ward off high blood pressure.

The first study included a small group of healthy adults who were asked to watch either a comedy or documentary film. They were then checked for activity of the carotid arteries -- the main arteries in the neck that bring blood to the brain and face -- during the films.

People who watched the comedy displayed improved "arterial compliance" -- the amount of blood that moves through the arteries at a given time. Decreased arterial compliance is often linked with high blood pressure and heart disease, according to an American College of Sports Medicine news release.

"Arterial compliance was improved for a full 24 hours after subjects watched a funny movie," said lead researcher Jun Sugawara. "Laughing is likely not the complete solution to a healthy heart, but it appears to contribute to positive effects."

The second study focused on vascular function and the dilation of blood vessels. When a second group of adults watched either a comedy or a serious documentary, there was more dilation of blood vessels during the comedy. Constricted blood vessels can be a cause of high blood pressure, the news release said.

"Not only did comedies improve vascular dilation, but watching a documentary about a depressing subject was actually harmful to the blood vessels," said Takashi Tarumi, lead researcher on the second study. "These documentaries constricted blood vessels by about 18 percent."

In both studies, the beneficial effects of laughter lasted for 24 hours, the researchers said.

The college's annual meeting concludes May 30.

SOURCES: May 29, 2009, news release, American College of Sports Medicine Published on: May 29, 2009