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Reasons aren't known, but researchers found racial, age and income differences

WebMD discusses how to follow a training program to go from your couch to a 5k in run in two to three months.

Yet no clear evidence the program improves diabetes, high-blood pressure, other ills, at least in early years of enrollment

Healthy eating helped men lower bad cholesterol

Older gamers may gain more mentally than crossword puzzle solvers, study suggests

Say they now have the 'playbook' for battling acute myeloid leukemia

Small study found they tended to do better at developing social skills when this 'co-therapist' was used

Study found no gains in lethargy, social withdrawal, but those on the drug improved in other ways

Adverse reactions to popular sleep meds rose almost 220 percent between 2005 and 2010, study finds

Researchers call for standardized safety regulations to reduce injuries

Sweetened food and beverages are source of too many empty calories, experts say

Females aged 15 or older to gain access to Plan B drug over-the-counter

Ten must-have pieces of advice for parents to give their teens – and how to do it so they listen.

Still, better care recommended for very early babies, researchers say

Key hormones, amino acids altered during digestion, study finds

Children with autism no likelier than others to have signs of tick-borne infection

Just a few cigarettes a day raises their risk, researchers say

Living with smokers may raise risk for heart disease, study suggests

Preteens appear to get same protection with two doses of HPV vaccine as young women who get three

Most doctors' incomes are going up, with orthopedic surgeons once again leading the way, according to a new Medscape survey of nearly 22,000 U.S. physicians.