Emotional stress can harm cardiovascular health, experts say, so boosting mental resilience may be key

Better slumber improved daytime energy and behavior, but not memory, learning, researchers say

But expert notes questions about frequency remain

Coming off meds sooner means fewer harmful side effects, study author says

High rates of obesity, heavy drinking, smoking and inactivity reported, but most people getting enough sleep

(Reuters) - Vivian Cheruiyot is not defending her world 5,000 and 10,000 meters gold medals in Moscow in August because she is expecting her first child, the Kenyan said in a statement. The 29-year-old, who won both races at the 2011 world athletics championships in Daegu, South Korea, took silver and bronze in the 5,000 and 10,000 at last year's London Olympics. In a statement released by her agent Ricky Simms on Wednesday, Cheruiyot said she would resume her career next year. She had first revealed her decision not to compete in Moscow on Tuesday but gave no reason for her absence. ...