WASHINGTON (AP) -- The largest study of U.S. children ever performed -- aiming to track 100,000 from conception to age 21 -- will start recruiting mothers-to-be in North Carolina and New York in January.

MEXICO CITY (AP) -- Mexico is working to mandate more physical education in public schools and encourage employers and unions to give workers time for exercise. The administration of President Felipe Calderon says it has built or renovated more than 800 public sports facilities around the country. The National Institute of Public Health is promoting food education and healthier choices in schools, such as fruits and vegetables instead of chips and soda.