Julie Steenhuysen

Sudden bursts of moderate to intense physical activity -- such as jogging or having sex -- significantly increase the risk of having a heart attack, especially in people who do not get regular exercise, U.S. researchers said on Tuesday.

Nearly 15 million people in the United States take care of a loved one with Alzheimer's disease or another form of dementia, amounting to 17 billion hours or more than $202 billion in unpaid care, Alzheimer's experts said on Tuesday.

Scientists know that being overweight increases the risk of breast cancers fed by estrogen, but being too fat may also increase the risk of triple-negative breast cancers, a less common and far more deadly type, U.S. researchers said on Tuesday.

People with diabetes in the United States and several other countries do not get effective treatment to control their disease, U.S. researchers said on Tuesday, and health insurance, not personal wealth, plays a big role in determining which diabetics get good care.

A study of the two most popular weight-loss surgeries found obese diabetics who had gastric bypass surgery lost 64 percent of their excess weight after a year, compared with 36 percent in those treated with Allergan Inc's Lap-Band device, researchers said on Monday.