The 20 terms 1 commonly used in swimming refer to the repeated local movements of legs, arms, breathing and inhaling according to the specific posture and technical requirements of each stroke, which are the basic elements of the complete technology of various strokes. It has great influence on developing special quality and improving special skills.
2 * * * refers to the depth of the body lying flat in the water and the depth of the buttocks in the water when swimming (in short, it refers to the relative position of the human body with the horizontal plane when swimming in the water), which is the main reference for evaluating the advantages and disadvantages of swimming techniques and technical teaching.
Body posture refers to the basic shape and requirements of the human body lying in the water when swimming. The basic postures of various swimming strokes are slightly different due to different technical characteristics: the supine position should be flat on the water, and the hips should be slightly straight to prevent the hips from sinking; In butterfly, the body should slightly alternate abdomen in and out, and with the cooperation of leg and arm movements, it presents regular ups and downs, forming wave movements, which is conducive to propulsion.
Body * * * refers to the depth of the body lying flat in the water and the depth of the buttocks in the water when swimming. Technical points of swimming breathing: head ventilation, mouth inhalation, nose inhalation, rapid inhalation, slow exhalation, or mastering the law of inhalation-suffocation-exhalation. Different swimming postures have different ways of breathing. In breaststroke and butterfly stroke, the head is raised in front, and in freestyle, the head turns sideways to inhale, and the back face is exposed to the water, making breathing convenient and natural. Any swimming breath should be coordinated with the movements of legs and arms.
Get familiar with water through certain teaching methods, guide students to know, experience and master the physical characteristics of water, and then teach the basic movements of swimming posture. The exercises include: 1 Walking in water: feel the resistance of water. 2. Floating body movement: experience the buoyancy of water and the principle of human ups and downs in water, and learn the ability to keep floating in water. 3. Breathing exercise: Understand and master the characteristics, methods and laws of underwater breathing and its rhythm with leg and arm movements. 4. Sliding practice. Master the correct posture and balance of the human body when swimming in the water, and the ability to obtain the sliding speed and swimming distance with the help of the reaction of the action thrust and pedaling force.
6 treading water, the human body floats vertically in the water by pedaling with two legs and paddling with two arms. When treading water, both legs do frog-like downward pedaling at the same time, and both arms do horizontal strokes on the chest. You can also use the method of alternately kicking the water with your legs and pressing the water up and down with your arms.
Water collection tip 7 When swimming, the longitudinal axis of the body is called the longitudinal axis when swimming.
8 the horizontal axis of the body when swimming When swimming, the axis that runs through the left and right direction of the body is called the horizontal axis.
9 vertical axis of the body when swimming When swimming, the axis running through the body in the up and down direction is called the vertical axis.
? Zy.swust 10 Swimming with two arms swinging alternately around the shoulders, such as shoulder-turning freestyle and backstroke, is particularly important. When swimming, the middle line of the body is taken as the axis, and the shoulders are connected, and the paddling and moving arms of the left and right arms are used instead, showing periodic ups and downs, and even involving the regular left and right shaking of the body.
1 1 paddling is a skill that uses the reasonable movement of the arm in the water to generate propulsion speed, and it is a key technical link in swimming. According to the technical requirements of different postures, the arm stroke can be summarized as follows: the arms stroke symmetrically at the same time, such as breaststroke and butterfly stroke; Alternate replacement of left arm and right arm to repeat the same stroke, such as freestyle and supine; In addition, there are asymmetric left arm and right arm alternately repeating their swimming strokes, such as freestyle.
12 paddling route refers to the paddling trajectory that the arm causes propulsion in the water. This trajectory is related to the stroke technique. According to the principle that the couple in the movement of an object will cause rotation, the forearm of the palm should be reasonably close to the body during the action stage when the arm paddling produces the maximum propulsion, so as to reduce the component of force and keep swimming in a straight line.
? Swimoutlet 13 double-arm action coordination refers to the connection and coordination of left and right arms paddling in the water. The upper limb paddling technique is the main driving force to produce propulsion, and the coordination of its movements and the exertion of skills are the key to obtain propulsion. The stroke technique in competitive swimming posture can be summarized into two categories: simultaneous symmetrical stroke with two arms and alternating stroke with left and right arms.
14 complete action coordination is called complete coordination for short. When swimming, according to the movement mode, sequence, requirements and rhythm of basic swimming strokes, the basic movements such as legs, arms and breathing are combined into a standardized, coordinated and periodic technique. It not only requires the local basic movements to be correct and reasonable, but also emphasizes the coherence and rhythm of the overall movement combination, showing the alternation of starting power and relaxing rhythm, so as to achieve the effect of saving physical strength, giving full play to speed and keeping swimming at a constant speed.
? Giphy 15 Elbows Extend your arms forward, and your arms extend forward, emphasizing that your shoulders should actively extend forward, with your hands together and your elbows together. It can adjust the attack angle of human body in water and improve the posture; Increase the range of arm stroke; It is also helpful to reduce the head-on resistance and improve the forward speed during the arm return process.
16 one of the long breaststroke arm stroke techniques. It is used for diving and an underwater stroke after breaststroke start and turn, with large action range and high propulsion speed.
17 kicking and clamping is a part of frog's leg movement and the key to kicking technique. The legs are pushed backward with the soles of the feet and the inner sides of the calves as the relative water surfaces, and the soles of the feet extend outward, backward and inward with arc whip acceleration, forming a continuous pushing and clamping process. At the end of the action, the legs are straight together and the thighs are slowly raised, which is streamlined.
18 leg whipping action refers to the instantaneous action of pushing forward caused by kicking water in the leg. Freestyle, butterfly kick down or kick up requires elastic movements, such as whipping.
19 action cycle The time required for a periodic action is expressed in seconds/time. All kinds of swimming postures form a complete technique according to the rhythm of swimming specific movements, which is repeated, generally taking the moment when the arm movements begin as the cycle, and it takes a complete cycle for the two arms to return to their original positions after one turn.
20-arm elbow stroke means that the arm bends first and then extends, and the elbow joint is always higher than the hand and forearm in the stroke process.