Turning 40 can be a powerful and transient event even though many women believe that everything starts to change or even fall apart at 40. This doesn't have to be so! Women can stay strong and competitive, healthy and fit well over the age of 40. There may be some changes you need to make, but it is an important time for you to make these changes so that you can continue to stay in shape.Some basic dietary changes can help you to supplement your workouts and keep you strong. Calcium, for example, has always been important in a woman's diet, but...