TUESDAY, Sept. 28 (HealthDay News) -- Think recess, and you'll probably smile. What wasn't to like about a break in the school day set aside for running and playing, for friends and fun?

(HealthDay News) -- Tooth decay usually occurs when bacteria eat away at enamel that covers the teeth, frequently causing cavities.

(HealthDay News) -- Even if it seems to take hours to get baby to sleep, there are times when you actually need to wake your infant.

TUESDAY, Sept. 28 (HealthDay News) -- American middle-school students who participate in team sports appear to be both physically and mentally better off than those who don't, a new study suggests.

TUESDAY, Sept. 28 (HealthDay News) -- In an effort to improve the prognosis of patients battling triple-negative breast cancer, scientists have identified a unique biomarker that may eventually allow some to receive a more targeted treatment.

TUESDAY, Sept. 28 (HealthDay News) -- Despite previous findings to the contrary, new research indicates that black patients with non-small cell lung are as likely to harbor a specific mutation in tumors as white patients.

TUESDAY, Sept. 28 (HealthDay News) -- An intensive lifestyle change program helped people with type 2 diabetes lose weight and keep it off, a new study shows.

TUESDAY, Sept. 28 (HealthDay News) -- People who engage in unhealthy habits such as smoking, eating a poor diet and not getting enough exercise turn out to be less productive on the job, new Dutch research shows.

TUESDAY, Sept. 28 (HealthDay News) -- Nursing home workers who are routinely exposed to violent encounters with either the residents they care for or visitors to the nursing home face a three times greater risk for developing painful musculoskeletal conditions, new research reveals.

TUESDAY, Sept. 28 (HealthDay News) -- Children who derive all their nutrition from breast-milk during their first six months of life are less prone to a host of common infections, new Greek research says.

TUESDAY, Sept. 28 (HealthDay News) -- A new Swiss study reports that a form of meditation known as mindfulness could help patients with multiple sclerosis, who often suffer from depression and anxiety.

TUESDAY, Sept. 28 (HealthDay News) -- New research from the University of Utah suggests that a touch-based navigation system embedded in a car's steering wheel and designed to interact with the skin of a driver's fingertips can be an effective way to deliver GPS-style directions.

TUESDAY, Sept. 28 (HealthDay News) -- While some research has linked abortion to the development of mental health problems, a small new study says teenagers who undergo the procedure aren't more likely to be depressed and have low self-esteem than other pregnant teens.

TUESDAY, Sept. 28 (HealthDay News) -- Patients with end-stage kidney disease who have dialysis at home fare just as well as their counterparts who do hemodialysis, which is traditionally performed in a hospital or dialysis center, new research shows.

TUESDAY, Sept. 28 (HealthDay News) -- When taken shortly after the onset of symptoms, the antiviral drug Tamiflu seems to have protected otherwise healthy swine flu patients from contracting pneumonia during the 2009 H1N1 pandemic, Chinese researchers say.

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

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

TUESDAY, Sept. 28 (HealthDay News) -- Levels of the blood biomarker C-reactive protein (CRP) can vary among different racial and ethnic groups, which might be a key in determining heart-disease risk and the value of cholesterol-lowering drugs, a new British study suggests.

TUESDAY, Sept. 28 (HealthDay News) -- A new blood test to spot a cluster of specific proteins may indicate the presence of prostate cancer more accurately and earlier than is now possible, new research suggests.