At our meditation retreats, yogis practise mindfulness in four different postures. They practise mindfulness when walking, when standing, when sitting, and when lying down. They must sustain mindfulness at all times in whatever position they are in. The primary posture for mindfulness meditation is sitting with legs crossed, but because the human body cannot tolerate this position for many hours without changing, we alternate periods of sitting meditation with periods of walking meditation. Since walking meditation is very important, I would like to discuss its nature, its significance, and the benefits derived from its practice.