Photo by CC user 24975064@N05 on Flickr Fitness is key at any age, and not just for younger folks, but for senior citizens as well. Whatever be your age you have to remain fit at all age. Not only the physical fitness but mentally also you should remain fit. Whether you are fit or ill you have to do the exercises to remain fit every time. Even at home you can do simple fitness exercises no need to rush the gym every day. Fitness exercise builds your strength, muscles and helps you to remain active every time. Don’t think you are…