I love Christmas! You eat, drink and be merry. Then you eat and drink some more. But come the New Year and you start to regret all that rich food and copious amounts of alcohol as you can no longer fasten the buttons on your favourite jeans. Hence the reason why so many diets and fitness plans are started in January. But this year Next has given us an extra incentive in the form of a fabulous new collection of workout and post workout clothing designed by the Queen of the fitness DVD’s, Davina McCall. As a gymaphobe, Sports wear is usually something I avoid, but I have to admit…