Many people exercise for weight loss, but what about working out so you are better prepared for the activities of everyday life, like carrying in groceries and putting them up? Like having the stamina for a busy day of errands and grandkids? Or climbing up and down the stairs without getting winded? That’s the idea behind functional fitness, an approach that’s increasingly popular with all sorts of people, including those over 50 who want to maintain their independence and quality of life without spending countless hours in a gym.