Holiday Weight Gain is Real Holiday weight gain is real, and it starts in October.  Experts say that the weight fluctuations  people experience around the holiday season start in October and peak after Christmas. They have also discovered that the average person takes FIVE MONTHS to shed this holiday weight. We figured it’s easier to avoid the weight gain altogether, than to spend your winter months stressing. That’s why we put together our top tips for avoiding holiday weight gain. Get Moving This one’s pretty obvious, but with colder weather and busier schedules sometimes