Secrets to being lean - even during the holidays

SAN DIEGO - Eggnog, turkey and stuffing, assorted pastries… at times the holidays seem to be as much about the food and drink as they are about sharing good times together. Is it any wonder that many gain weight during the holiday season?

Researchers at the National Institute of Child Health and Human Development and the National Institute of Diabetes and Digestive and Kidney Diseases have found the average person gains a pound a year from holiday eating, which accumulates and can lead to health problems later in life. How do some people seem to stay thin all the time?

Here are some things to...