Making exercise a daily routine, from childhood, could be the key to preventing or slowing down some of the diseases of old age. Multiple studies have demonstrated the efficacy of physical activity, in improving cognitive health, throughout the human lifespan. Jenny Etnier is a professor of sport and exercise psychology in the Department of Kinesiology at the University of North Carolina. Working with children and older adults she is an advocate for exercise to nurture the mind and stimulate a healthy brain. In this LLAMA podcast episode, with Peter Bowes, Dr. Etnier explains the lifetime benefits of physical education in schools; the meaning of mental toughness; and the reason why we should all enjoy a few minutes of "pure joy" every day.