The climbers native action of free fall is a drop where the rope hangs free, not touching rocks or walls. But rappelling is a much safer adventure sport than mountain climbing and anyone with usual strength can participate in this activity. This sport is without any danger and upper body strength is not necessary to enjoy this sport.
Climbing and rappelling provides an amateur basic knowledge of the sport and will permit an initial, supervised experience. A unique and exhilarating way to experience and if you can walk you can rappel too.