It doesn't matter how dedicated a dieter you are or how much you push yourself on the treadmill, there always comes a time when the thought of leaving the house to run in the pouring rain or the sight of that delicious-looking chocolate brownie is just too much to bear putting an end to all your good intentions. Fitness DVDs are a great way to keep you motivated when you can barely summon enough energy to drag yourself off the sofa and provide you with a success story and fitness buddy all-in-one. To help keep you on the road to a slender and happier you, we've chosen the 10 best fitness DVDs out there, and from Hannah Waterman to Tracy Anderson, there's a routine to suit everyone.See our pick of the newest fitness DVDs for 2011.Booked your holiday? Bought your bikini? Read our bikini body special for all the diet, fitness and beauty tips you need.Our health and fitness expert picks her top 10 fat-busting foods.