THURSDAY, Jan. 7 (HealthDay News) -- If you're vowing to lose weight this year, consider adding a regular exercise program while you're cutting calories.

THURSDAY, Jan. 7 (HealthDay News) -- Although only four states are now reporting widespread H1N1 swine flu activity, U.S. health officials caution that a new outbreak is possible.

THURSDAY, Jan. 7 (HealthDay News) -- For the first time in the United States, doctors have spotted an outbreak of Salmonella linked to African dwarf frogs, typically kept in home aquariums.

THURSDAY, Jan. 7 (HealthDay News) -- Stressing the benefits of not smoking may work better than emphasizing the negative effects of cigarettes in persuading smokers to kick the habit, a new study has found.

(HealthDay News) -- Here are the latest clinical trials, courtesy of ClinicalConnection.com:

THURSDAY, Jan. 7 (HealthDay News) -- The U.S. Environmental Protection Agency on Thursday proposed stricter standards for smog, which has been linked to a variety of health problems, including aggravated asthma and premature death from heart and lung disease.

THURSDAY, Jan. 7 (HealthDay News) -- New research suggests that the drug ipratropium bromide (Atrovent), used widely among patients who have chronic obstructive pulmonary disease (COPD), may raise the risk of heart attack and heart failure, while a separate study of the COPD drug tiotropium (Spiriva) shows it may well lower the risk of heart problems and death.

THURSDAY, Jan. 7 (HealthDay News) -- Medicare's so-called "doughnut hole" could be forcing many American seniors to skip their diabetes medications, a new study suggests.

THURSDAY, Jan. 7 (HealthDay News) -- A key mechanism in the brain that helps explain how people become addicted to cocaine has been identified by U.S. government scientists, who say their finding could lead to the development of new treatments for drug addiction.

Here are some of the latest health and medical news developments, compiled by the editors of HealthDay:

THURSDAY, Jan. 7 (HealthDay News) -- An enzyme that normally helps break down stored fats becomes highly active in some cancer cells and makes them more likely to spread, researchers have found.

THURSDAY, Jan. 7 (HealthDay News) -- Many reduced-calorie restaurant and packaged foods in the United States have more calories than indicated on their nutritional labeling, a new study reports.

THURSDAY, Jan. 7 (HealthDay News) -- The popular herbal supplement St. John's wort does not appear to relieve the pain and discomfort that accompanies irritable bowel syndrome (IBS), new research suggests.

THURSDAY, Jan. 7 (HealthDay News) -- A new way of genetically modifying human embryonic stem cells would enable rapid development of stem cell lines that could be used for research into genetic diseases, say U.S. scientists.

THURSDAY, Jan. 7 (HealthDay News) -- Childhood cancer survivors are at increased risk for diabetes, high cholesterol and high blood pressure, all of which predispose them to heart disease, say U.S. researchers.

THURSDAY, Jan. 7 (HealthDay News) -- Assisted living facilities for older people are most often located in areas with higher levels of income, education and home values, a new study shows.

THURSDAY, Jan. 7 (HealthDay News) -- Patients who undergo knee or hip replacement surgery have a slightly increased risk of death for only 26 days after the procedure, claims a study that challenges earlier findings.

(HealthDay News) -- Dentures can cause pain and discomfort if they're not worn properly and cleaned thoroughly.

(HealthDay News) -- Failure to thrive is a general medical term that describes when babies fail to gain weight and grow as expected. It can have numerous possible causes.