How Teen Sex Affects Education

SUNDAY, Aug. 15 (HealthDay News) -- Having sex while in a romantic relationship doesn't generally affect teens' grades in school, but casual sex might, a new study shows.

Proper Training for Marathon Run Takes Time, Experts Say

SUNDAY, Aug. 15 (HealthDay News) -- Attempting a marathon is a challenge that can bring a great feeling of accomplishment but runners need to be careful to avoid training injuries and other health problems, experts advise.