A prayer walk is an activity that consists in walking and praying at the same time[1]. It's done not for the physical benefit but for the spiritual exercise, either publicly functioning also as a demonstration or rally (to let other people know the group is praying), or quietly in sight of the subject. For instance, a person or group may be praying for a town or city, and walk the streets of the city while praying, either out loud, or in silence.