It's that time of year again: family comes into town or you have to visit family, you need to buy gifts, maybe you are finishing up a semester at school and it's finals week, workload is piling up before the year end, you are stressing about having enough money to buy gifts, more food and still pay the bills, it's colder outside, so your couch, bed and/or significant other feel way more comfortable, and because we are showing less skin, we don't mind getting a bit "fluffier". You miss a few training days and soon the days you are able to make it in don't seem as important. Although you may have time, your will to make it to the gym is not there, and then you tell yourself you will "pick it up again after the new year".
We are all creatures of habit and if you have established the habit of making it to the gym on a regular basis, that is great! It probably took you 2-3 weeks of planning and discipline to get into that habit. Between the week leading up to Christmas and through the new year is the same amount of time to establish another habit, that of not being able to make the time to train and once the new year is upon you, you have to spend another 2-3 weeks of planning and discipline to break that habit again.
If you miss a few training days throughout the holiday season, it's no big deal. It will happen. But don't get sucked into a repertoire of inactivity just because you missed a few days. The days you can make it in are still very important. Your progress may be slowed a bit, but by still getting to the gym on days you can make it, you are reinforcing your habit and not letting yourself slip. Keep your health a top priority during the holidays and make it in when you can!