You may think the holiday season is one of the most difficult times of the year to get into shape. From the eggnog and baked ham to pies and spirits, the end of the year is a time marked with festive parties and more opportunities to indulge. Despite media reports declaring that the average American gains between 5 to 10 pounds, new research shows seasonal weight gain is quite modest. From Thanksgiving to New Year’s Day, in reality we may only gain a pound. So if you’ve been putting off going to the gym because you think you’re efforts will be in vain, think again.