(HealthDay News) -- Caffeine is much more than a wake-me-up among coffee drinkers. The chemical stimulant also is found in everything from popular sodas to over-the-counter pain relievers and cold remedies.

(HealthDay News) -- Gymnastics can lead to injury without some preparation. In 2007, more than 69,000 kids under age 14 were treated for gymnastics-related medical problems, the American Academy of Orthopaedic Surgeons says.

SUNDAY, Oct. 24 (HealthDay News) -- Bitter taste receptors are located in the lungs as well as on the tongue, a finding that might lead to improved treatments for asthma and other obstructive lung diseases, according to researchers at the University of Maryland School of Medicine in Baltimore.

SUNDAY, Oct. 24 (HealthDay News) -- Concussions in professional football have been a hot topic of late: Just last week, the National Football League announced it would begin suspending players for illegal and dangerous hits that often result in head injuries.

MONDAY, Oct. 25 (HealthDay News) -- The arteries of obese children have a degree of stiffness normally seen in adults with heart disease, according to a new study.

MONDAY, Oct. 25 (HealthDay News) -- Colorectal cancer screening among poor minority women could be increased by offering to arrange for the procedure during a mammography visit, a new study suggests.

MONDAY, Oct. 25 (HealthDay News) -- Don't expect teens -- or their parents -- to be honest about their drug use, a new study shows.

MONDAY, Oct. 25 (HealthDay News) -- Running a marathon can damage your heart, with more than half of the segments in the heart's main pumping chamber typically functioning a little under par during the race, a new study shows.

MONDAY, Oct. 25 (HealthDay News) -- New research may offer some relief to sleep-starved parents: Most infants will start sleeping through the night between 2 and 4 months of age.

MONDAY, Oct. 25 (HealthDay News) -- A woman's weight influences her fertility, two new studies suggest.

MONDAY, Oct. 25 (HealthDay News) -- Heavy smoking in middle age seems to increase the risk for developing Alzheimer's disease or another dementia, a large new study suggests.

MONDAY, Oct. 25 (HealthDay News) -- Having a prostate-specific antigen (PSA) test to screen for prostate cancer reduces the risk that if cancer develops it will spread to other parts of the body, new research indicates.

MONDAY, Oct. 25 (HealthDay News) -- Patients who receive radiation before surgery for rectal cancer are about 50 percent less likely to experience a return of their cancer, a new Dutch study has found.

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

MONDAY, Oct. 25 (HealthDay News) -- Why is it that two people can be equally sleep-deprived, and yet the next day one person ends up feeling more tired and listless than the other?

MONDAY, Oct. 25 (HealthDay News) -- One of the world's most ubiquitous and pedestrian drugs -- aspirin -- may cut the risk of dying for men who have prostate cancer that has not yet spread beyond the gland, a new study suggests.

MONDAY, Oct. 25 (HealthDay News) -- Complications following gastrointestinal endoscopies -- procedures performed to detect ulcers, cancer and other conditions -- may be higher than previously estimated.