Windsurfing is a physical activity that develops muscle endurance. The muscles of the legs, arms and back are worked. Improper practice can cause lower back pain, so it is important guidance for beginners. Always look for an instructor or specialist school to start the sport. Never underestimate the winds or the sea: when you are not safe to play, do not risk it. Never sail with offshore winds, ie winds towards the sea. It becomes very dangerous because the practitioner can hardly reach the earth.