The story goes that most people gain an average 5lbs during the holiday season. However, the New England Journal of Medicine conducted a study of approximately 200 people which proves that the 5lb weigh gain is not as true as previously thought.
There are graphs and variations taking into account the age of the person, the current weight, conditions and the understanding that as one gets older there is a continued weight increase which is not that more significant during the holiday season. The conclusions will astound you!
Please see the New England Journal of Medicine's detailed graphs and charts to see where you are! Make sure to click on the full article to get a complete understanding of the study.
http://content.nejm.org/cgi/content/full/342/12/861#F2
http://content.nejm.org/cgi/content/full/342/12/861#F2