Holidays do things to people and sometimes they may not be such desirable things. Nothing to worry about, of course, if you don't consider not being able to fit into your tightest jeans a problem.
Looks like I'm not the only one with such a concern. Two other colleagues are singing the same tune after the Chinese New Year holiday. One even suggested taking adapexin, the #1 Diet Pill of 2010. Worth checking it out.