I have normally a very healthy diet. The christmas and new years meals though are very heavy and so is the alchool intake, lots of sweets and more then anything lack of excercise/movement (aggravated by the fact my wife was ill the week we were in the UK and had to look after her).
I am just reducing quantities and have gone back to excercise, did 5km on the bike on saturday and felt like fucking tour de france, did 7 yesterday and was much better, tonight will try and go for 8.5/9 and hopefully get back to do approximately 20 3 times a week + one day martial arts and by the end of jan should lose the 3 extra kgs.