While most of us have spent our whole lives walking, how much consideration have we really given to the full benefits? Writer and keen walker Annabel Streets has been researching the science behind walking, and has found walking can expand your mind, build muscle, boost your immunity, improve your vision, burn calories, help you sleep, reduce anxiety, improve your memory and lift your mood. In her new book 52 Ways to Walk: The Surprising Science Of Walking For Wellness And Joy, One Week At A Time, Annabel Streets takes readers through 52 weeks of walks, which will inspire and encourage you to mix up how, when and where you walk, to get the most out of each step. She says she was initially motivated to learn more about the benefits of walking, as a way to counter the excuses offered up by her husband and teenage children. So, are there any good excuses for not going for a walk?