No matter what kind of sports you participate in, adequate warm-up preparatory activities are the main means to ensure that you do not suffer from sports injuries. Today, we will teach you a set of warm-up exercises before exercise: 1, palms straight up, arms outwardly open and then slowly straighten back to feel the chest, shoulders, arm muscles are tense. Action with breathing, do 5 groups. 2, the left foot forward a large step, knee bent, more than the toes, the back leg taut, do leg press action. Action with breathing, leg press 8, change sides, and repeat the same action, do 2 groups. 3, the body upright, arms bent at the elbow in front of the chest, the two hands crossed fingers to hold each other, around the ring activity wrist joints. At the same time, the left foot back half step, heel up, toe point from the outside to the inside of the ring, activity ankle joint. Change sides, and repeat the same action, do 5 groups. 4, feet open and shoulder width, one hand straight up across the head to stretch outward, the other one crossed waist, waist outward bending stretch. Action with breathing, bend 15, change sides, and repeat the same action, do 5 groups. 5, both hands palms cross each other, push straight up to feel the tight point stop, hold still. Action with breathing, and stay for more than 10 seconds, do 5 groups. 6, one hand grasping the elbow of the other, slowly pull inward toward the head. Action with breathing stay 15-20 seconds, change sides and repeat the same action, do 5 groups. 7, the right leg to the right step, knee bent, more than the toes, the back leg taut, do leg press action. Action with breathing, leg press 8, change sides, and repeat the same action, do 2 groups. 8, sitting on the floor with the left leg flat, the other leg will cross it into a bent shape. The right hand slowly push the bent right knee inward until you feel the muscle tightness. Move with breathing, stay for 15-20 seconds, do 5 sets. 9, sitting on the floor, legs straight, body leaning forward, hands to the direction of the toes. Move with breathing, stay for 10-15 seconds, do 5 sets. 10.Stand on one leg, grab the ankle of the other leg, then slowly pull back to the hip, pay attention to the pelvis do not tilt, while keeping the torso upright. Move with breathing, stay for 15-20 seconds, change sides and repeat the same action, do 5 sets. Through the above warm-up exercises can effectively overcome the inertia of the vegetative nerves, through the activities of the joints and muscles of the whole body, accelerate the blood circulation bad, so that muscle tissue gets sufficient blood supply, in order to enhance the strength and elasticity of the muscles, and restore the conditioned reflex connection of technical movements, to be fully prepared for the formal exercise.