Exercise overrides genes

CNN reports:

The researchers found that Amish people with the genetic variant [ for obesity] were no more likely to be overweight than those who had the regular version of the gene -- as long as they got three to four hours of moderate activity every day. That included things like brisk walking, housecleaning and gardening.

And while physical activity is recommended for just about everyone, the study suggests that people with the gene variation need to be especially vigilant about getting exercise.