Many of us are searching for a magic bullet to improve our longevity, whether it be a supplement, medication, or exotic superfood. And yet, when it comes to enhancing our health span and preventing cognitive and physical decline, it turns out that exercise is the most potent tool we have at our disposal… even more than nutrition, sleep, or medication.   Exercise is the key to living a longer, healthier life, and nobody knows that better than today's podcast guest, Dr. Bob Sallis.   Bob is a visionary physician who helped launch the groundbreaking initiative, Exercise is Medicine in 2009 while president of the American College of Sports Medicine. By introducing a new approach of focusing on lifestyle and specifically exercise to extend your health span and prevent chronic diseases, Bob helped start the game-changing discussions that there is a new approach to aging.   For more podcasts, visit www.kathysmith.com/podcast.