(HealthDay News) -- Regular aerobic exercise -- including walking, running and swimming -- is key to better cardiovascular and lung health.

(HealthDay News) -- Anytime a child is swimming or boating on a lake, river or stream, he or she should don a life jacket.

TUESDAY, Aug. 23 (HealthDay News) -- Bullying may contribute to a drop in high school students' grades, especially if they're black and Hispanic teens who are high achievers, a new study has found.

TUESDAY, Aug. 23 (HealthDay News) -- Women at high risk for breast cancer who smoke and drink are less likely to stick with a drug regimen meant to prevent cancer, a new study finds.

TUESDAY, Aug. 23 (HealthDay News) -- The amount of fighting and arguing in your marriage isn't likely to change much over the years, a new study suggests.

TUESDAY, Aug. 23 (HealthDay News) -- Certain types of mental illnesses affect either men or women more often, a new study indicates.

TUESDAY, Aug. 23 (HealthDay News) -- Women suffering from heart failure receive roughly the same quality of care as men in hospitals that follow American Heart Association guidelines, according to a new study.

TUESDAY, Aug. 23 (HealthDay News) -- A common form of heart trouble called diastolic dysfunction appears to worsen over time and may lead to an increased risk of heart failure, new research shows.

TUESDAY, Aug. 23 (HealthDay News) -- Children diagnosed with attention-deficit hyperactivity disorder (ADHD) have a much higher risk of developing a written language disorder, a new study indicates.

TUESDAY, Aug. 23 (HealthDay News) -- From factory workers to bankers, some of the jobless men in what's been dubbed the "mancession" are redefining their masculinity by doing more housework as they support their working partners, a small study suggests.

TUESDAY, Aug. 23 (HealthDay News) -- Researchers say boys are becoming physically mature earlier than ever before -- noting that males have been reaching sexual maturity about 2.5 months earlier every decade since at least the mid-1700s.

TUESDAY, Aug. 23 (HealthDay News) -- Adding specific cholesterol-lowering foods, such as nuts, to your diet can lower your cholesterol more than a low-fat diet alone can, new research suggests.

TUESDAY, Aug. 23 (HealthDay News) -- A test that detects the two strains of human papillomavirus (HPV) that are most likely to raise the risk of invasive cervical cancer, when combined with the Pap test, may be more accurate for many women than the Pap test alone, a new study indicates.

TUESDAY, Aug. 23 (HealthDay News) -- An extensive review of research investigating injectable drugs to treat psoriasis -- an autoimmune disorder triggering itchy, red skin patches -- indicates the medications are not linked to higher heart risks.

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

TUESDAY, Aug. 23 (HealthDay News) -- Accidental exposure to highly toxic chemotherapy drugs is common among cancer nurses in the United States, a new study finds.

TUESDAY, Aug. 23 (HealthDay News) -- Many patients who are hospitalized fail to receive their regular medications for chronic conditions during their stay and often fail to restart them when they're discharged, researchers say.

TUESDAY, Aug. 23 (HealthDay News) -- A rare -- for the East Coast -- earthquake rumbled up and down the eastern seaboard of North America Tuesday afternoon, jumbling nerves as far south as Atlanta and as far north as Canada.