MONDAY, July 5 (HealthDay News) -- Extreme summer heat can be more than uncomfortable, it can be deadly.

SUNDAY, July 4 (HealthDay News) -- The health benefits of cycling in an urban environment outweigh risks posed by air pollution and accidents, a new study has concluded.

(HealthDay News) -- When bacteria or other germs set up shop in your food, they can make you quite sick.

(HealthDay News) -- Fireworks can make for a spectacular celebration, but they can also cause serious injury.

MONDAY, July 5 (HealthDay News) -- Middle-aged and older men who take erectile dysfunction drugs such as Viagra are more likely to have sexually transmitted diseases, a new study of more than 1.4 million men finds.

MONDAY, July 5 (HealthDay News) -- Too much time spent watching television and playing video games can double the risk of attention problems in children and young adults, new research finds.

MONDAY, July 5 (HealthDay News) -- American children are seeing fewer TV ads for candy and beverages, but more fast food commercials, finds a new study.

MONDAY, July 5 (HealthDay News) -- High school students at a private school in Rhode Island who started school a half-hour later in the morning were in better moods, more alert, less depressed and more likely to actually attend class than before the time change, a new study shows.