📚 Year 11 WJEC Physical Education: Core Knowledge Summary | WJEC 体育：核心知识点梳理
Understanding the core topics in Year 11 WJEC Physical Education is essential for exam success. This revision guide summarises key knowledge across all units, from anatomy and physiology to sport psychology and socio-cultural influences.
掌握WJEC体育学科十一年级课程的核心内容对于考试成功至关重要。本复习指南汇总了所有单元的关键知识点，涵盖从解剖生理学到运动心理学及社会文化影响因素的全部内容。
1. The Skeletal and Muscular Systems | 骨骼与肌肉系统
The skeletal system provides five key functions: support, protection, movement, blood cell production and mineral storage. Bones serve as levers and attachment points, working with muscles to produce movement.
骨骼系统提供五大功能：支撑、保护、运动、血细胞生成和矿物质储存。骨骼充当杠杆和附着点，与肌肉协同工作以产生运动。
Joints are classified by structure and function. Ball and socket joints (hip, shoulder) allow movement in all directions. Hinge joints (elbow, knee) permit flexion and extension. Pivot joints (neck) enable rotation, while gliding joints (between vertebrae) allow small sliding movements.
关节根据结构和功能分类。球窝关节（髋关节、肩关节）允许全方向运动。铰链关节（肘关节、膝关节）允许屈伸。枢轴关节（颈部）实现旋转，而滑动关节（椎骨间）允许小幅的滑行运动。
During movement, muscles work in antagonistic pairs. The agonist (prime mover) contracts to create movement, while the antagonist relaxes. For example, when flexing the elbow, the biceps brachii is the agonist and the triceps brachii is the antagonist. Muscular contractions can be isotonic (concentric – muscle shortens, eccentric – muscle lengthens) or isometric (muscle length stays the same under tension).
运动中，肌肉以拮抗肌对的形式工作。主动肌（原动肌）收缩产生运动，拮抗肌则放松。例如，屈肘时肱二头肌是主动肌，肱三头肌是拮抗肌。肌肉收缩可为等张收缩（向心收缩——肌肉缩短，离心收缩——肌肉拉长）或等长收缩（肌肉在张力下长度不变）。
Muscle fibres are classified into three main types:
肌纤维主要分为三种类型：
| Fibre Type | Characteristics | Sporting Example |
|---|---|---|
| Type I (slow oxidative) | Slow contraction, high endurance, aerobic | Marathon running, cycling |
| Type IIa (fast oxidative glycolytic) | Faster contraction, moderate endurance, can work aerobically and anaerobically | 1500 m run, rugby |
| Type IIb (fast glycolytic) | Very fast contraction, low endurance, anaerobic | Sprinting, shot put |
Type I fibres are rich in myoglobin and mitochondria, making them fatigue‑resistant. Type IIb fibres generate explosive power but tire quickly. Type IIa fibres possess mixed characteristics, adaptable through sprint or endurance training.
I型纤维富含肌红蛋白和线粒体，抗疲劳性强。IIb型纤维能产生爆发力但迅速疲劳。IIa型纤维具有混合特征，可通过短跑或耐力训练加以改造。
2. The Cardiovascular System | 心血管系统
The cardiovascular system consists of the heart, blood vessels and blood. Its primary roles are transporting oxygen, nutrients and hormones, removing waste products such as carbon dioxide, and regulating body temperature.
心血管系统由心脏、血管和血液组成。其主要作用是运输氧气、营养物质和激素，移除二氧化碳等废物，并调节体温。
The heart has four chambers: right atrium, right ventricle, left atrium and left ventricle. Deoxygenated blood returns to the right side and is pumped to the lungs via the pulmonary artery. Oxygenated blood enters the left side and is sent to the body through the aorta. Valves prevent backflow, ensuring one‑way circulation.
心脏有四个腔室：右心房、右心室、左心房和左心室。缺氧血液回流至右心，经肺动脉泵入肺部。富氧血液进入左心并通过主动脉输送到全身。瓣膜防止回流，确保单向循环。
Key cardiac volumes respond to exercise. Stroke volume (SV) is the amount of blood ejected per beat. Heart rate (HR) is beats per minute. Cardiac output (Q) = SV × HR. During exercise, both SV and HR rise, dramatically increasing Q. Resting HR of a trained athlete is often lower due to cardiac hypertrophy.
关键的心输出量指标随运动变化。每搏输出量（SV）是每次心跳泵出的血量。心率（HR）是每分钟心跳次数。心输出量（Q）= SV × HR。运动时SV和HR均升高，使Q大幅增加。由于心脏肥大，训练有素的运动员静息心率通常较低。
Q = SV × HR
Cardiac output, stroke volume and heart rate can be estimated using formulas such as HRₘₐₓ = 220 – age. Understanding these relationships helps design effective training programmes.
心输出量、每搏输出量和心率可通过公式估算，如HRₘₐₓ = 220 – 年龄。理解这些关系有助于设计有效的训练方案。
3. The Respiratory System | 呼吸系统
Respiration brings oxygen into the body and removes carbon dioxide. Air enters through the nose or mouth, travels down the trachea, into the bronchi, bronchioles and finally reaches the alveoli where gaseous exchange occurs.
呼吸将氧气带入体内并排出二氧化碳。空气经口鼻进入，向下通过气管、支气管、细支气管，最终到达肺泡，在此进行气体交换。
Gaseous exchange relies on diffusion. In the alveoli, oxygen diffuses into the surrounding capillaries because the oxygen concentration is lower in the blood. Simultaneously, carbon dioxide diffuses from the blood into the alveoli to be exhaled. A large surface area and thin alveolar walls maximise efficiency.
气体交换依靠扩散。在肺泡中，由于血液中氧浓度较低，氧气扩散进入周围的毛细血管。同时，二氧化碳从血液扩散进肺泡被呼出。巨大的表面积和极薄的肺泡壁最大限度地提高了交换效率。
Breathing volumes change during exercise. Tidal volume (TV) is the amount of air inhaled or exhaled per normal breath. Minute ventilation (VE) = TV × respiratory rate. During physical activity, both TV and breathing rate increase, raising VE significantly. Vital capacity is the maximum amount of air that can be forcibly exhaled after a full inhalation.
运动时呼吸容量发生改变。潮气量（TV）是每次正常呼吸吸入或呼出的空气量。每分通气量（VE）= TV × 呼吸频率。运动过程中，潮气量和呼吸频率均增加，显著提高VE。肺活量是完全吸气后能用力呼出的最大气量。
VE = TV × f (breathing frequency)
4. Aerobic and Anaerobic Exercise | 有氧与无氧运动
Aerobic exercise uses oxygen to break down glucose or fats, producing a large amount of ATP without fatiguing byproducts. It supports sustained, moderate‑intensity activity such as long‑distance running. Anaerobic exercise, on the other hand, does not require oxygen and provides energy rapidly for high‑intensity bursts like sprinting. However, it produces lactic acid, which contributes to muscle fatigue.
有氧运动利用氧气分解葡萄糖或脂肪，产生大量ATP且无致疲劳副产物。它支持中低强度的持续运动，如长跑。而无氧运动不需要氧气，可为短跑等高强度爆发提供快速能量，但会产生乳酸，导致肌肉疲劳。
The body relies on three energy systems: the ATP‑PC (phosphocreatine) system for immediate energy lasting up to 10 seconds, the anaerobic glycolytic system (lactic acid system) for up to 60–90 seconds, and the aerobic system for prolonged activity. Excess post‑exercise oxygen consumption (EPOC) refers to the elevated oxygen intake after exercise, needed to restore the body to its resting state and clear lactic acid.
人体依赖三个能量系统：ATP‑PC（磷酸肌酸）系统提供最多10秒的即时能量，无氧糖酵解系统（乳酸系统）支撑60–90秒的运动，有氧系统则负责长时间活动。运动后过量氧耗（EPOC）指运动后摄氧量仍高于静息水平的现象，是身体恢复和清除乳酸所必需的。
5. Levers and Planes of Movement | 杠杆与运动平面
Levers in the body consist of a fulcrum (joint), effort (muscle contraction) and load (body weight or resistance). There are three classes of levers, classified according to the relative position of these components.
人体中的杠杆由支点（关节）、动力（肌肉收缩）和阻力（体重或负重）组成。根据三者的相对位置，杠杆分为三类。
| Class | Arrangement (F=fulcrum, L=load, E=effort) | Example in the Body |
|---|---|---|
| First class | E–F–L | Neck nodding (atlanto‑occipital joint) |
| Second class | F–L–E | Standing on tiptoes (ankle) |
| Third class | F–E–L | Bicep curl (elbow) |
Mechanical advantage (MA) = effort arm / resistance arm. Second‑class levers have a mechanical advantage greater than 1, meaning they can move large loads with smaller effort. Third‑class levers, which are most common in the body, have MA < 1, favouring speed and range of motion over force.
机械利益（MA）= 力臂 / 阻力臂。第二类杠杆的机械利益大于1，意味着能以较小的力移动大负荷。人体中最常见的是第三类杠杆，其MA < 1，以牺牲力来换取速度和运动幅度。
Movement is analysed in three anatomical planes: the sagittal plane divides the body into left and right and includes flexion and extension movements like running. The frontal plane splits the body into front and back and involves abduction and adduction, e.g. star jumps. The transverse plane divides the body into top and bottom, allowing rotational movements such as a discus throw.
运动分析使用三个解剖平面：矢状面将身体分为左右两部分，包含跑步中的屈伸动作；额状面将身体分为前后，包含外展和内收，如开合跳；横断面将身体分为上下，允许旋转运动，如掷铁饼。
6. Health, Fitness and Well‑being | 健康、体能与幸福感
Health is defined as a state of complete physical, mental and social well‑being, not merely the absence of disease. Fitness is the ability to meet the demands of the environment. Both are closely interlinked with lifestyle choices.
健康被定义为身体、心理和社会多方面的完满状态，而不仅仅是没有疾病。体能则是满足环境需求的能力。两者与生活方式选择紧密相连。
Components of fitness are split into health‑related and skill‑related categories. Health‑related fitness includes cardiovascular endurance, muscular strength, muscular endurance, flexibility and body composition. Skill‑related fitness encompasses agility, balance, coordination, power, reaction time and speed. Each sport demands a different blend of these components.
体能要素分为健康相关和技能相关两大类。健康相关体能包括心血管耐力、肌肉力量、肌肉耐力、柔韧性和身体成分。技能相关体能包括灵敏性、平衡、协调性、爆发力、反应时间和速度。不同运动要求这些要素的不同组合。
Regular physical activity reduces the risk of obesity, type 2 diabetes and cardiovascular disease. It also enhances mental well‑being by releasing endorphins, reducing stress and improving self‑esteem.
定期体育锻炼能降低肥胖、2型糖尿病和心血管疾病的风险。通过释放内啡肽、缓解压力和提升自尊，它还能增进心理健康。
7. Principles of Training and Methods | 训练原则与方法
Effective training programmes follow the principles of individual needs, progressive overload, specificity, rest and recovery, and reversibility. The FITT principle guides how to apply overload: Frequency, Intensity, Time and Type.
有效的训练方案遵循个体需求、渐进超负荷、专项性、休息恢复和可逆性原则。FITT原则指导如何实施超负荷：频率（Frequency）、强度（Intensity）、时间（Time）和类型（Type）。
Progressive overload means gradually increasing the demands on the body to improve fitness. Specificity ensures training matches the particular demands of the sport. Reversibility warns that fitness gains are lost when training ceases.
渐进超负荷意味着逐渐增加对身体的要求以提高体能。专项性确保训练符合特定运动的专项需求。可逆性则警示停训会导致体能增益消退。
Common training methods include continuous training (steady‑state aerobic work), interval training (alternating periods of intense work and recovery), circuit training (a series of exercises at stations), weight training (resistance exercises using free weights or machines), and flexibility training (static, dynamic, PNF). The choice depends on the component of fitness being targeted.
常见的训练方法包括持续训练（稳态有氧运动）、间歇训练（高强度工作与恢复交替）、循环训练（按站点依次练习）、重量训练（使用自由重量或器械的抗阻练习）和柔韧性训练（静态、动态、PNF）。方法的选择取决于所针对的体能要素。
8. Skill Classification and Practice | 技能分类与练习
Skills can be classified on different continua. An open skill is performed in an unpredictable environment where the performer must react to external factors (e.g., a pass in football). A closed skill is performed in a stable, predictable setting (e.g., a free throw in basketball).
技能可按不同连续体分类。开放技能在不可预测的环境中进行，执行者必须根据外部因素做出反应（如足球中的传球）。封闭技能则在稳定、可预测的环境下完成（如篮球中的罚球）。
Skills are also classified as basic (simple, few decisions, e.g., running) or complex (many decisions, high perceptual demand, e.g., a gymnastics routine). A novice often learns through part practice, breaking the skill into sub‑routines, while an expert benefits from whole practice to retain the skill’s flow. Variable practice involves changing conditions to develop adaptability, whereas fixed practice repeats the skill in the same way to establish consistency.
技能还可分为基本技能（简单、决策少，如跑步）或复杂技能（决策多、感知要求高，如体操成套）。初学者常采用分解练习，将技能拆分为子程序；而专家通过完整练习受益，以保持技能的连贯性。变换练习在变化条件下发展适应能力，固定练习则以同样方式重复技能以建立一致性。
9. Goal Setting and Motivation | 目标设定与动机
Goal setting improves focus, confidence and persistence. Goals should be SMART: Specific, Measurable, Achievable, Recorded and Timed. Performance goals relate to personal improvement (e.g., beating a personal best), whereas outcome goals focus on the result (e.g., winning a race). Process goals concentrate on technique.
目标设定能提升专注力、信心和毅力。目标应遵循SMART原则：具体、可衡量、可实现、有记录和有时限。绩效目标关乎个人进步（如刷新个人最好成绩），结果目标则关注胜负（如赢得比赛）。过程目标侧重于技术。
Motivation is categorised as intrinsic (driven by internal rewards such as enjoyment or satisfaction) and extrinsic (driven by external rewards like trophies, praise or money). Intrinsic motivation is often more sustainable for long‑term participation.
动机分为内在动机（由内部奖赏驱动，如乐趣、满足感）和外在动机（由外部奖赏驱动，如奖杯、赞扬或金钱）。内在动机对长期参与通常更具可持续性。
10. Information Processing and Feedback | 信息处理与反馈
Information processing models explain how performers make decisions. Whiting’s model includes input from the environment, sense organs, perceptual mechanisms, translatory mechanisms (decision‑making), effector mechanisms, output and feedback. A performer must select relevant cues, compare to memory and produce a motor response.
信息处理模型解释了运动员如何做出决策。Whiting模型包含环境输入、感觉器官、知觉机制、转译机制（决策）、效应器机制、输出和反馈。执行者必须选择相关线索，与记忆比对并产生运动反应。
Feedback is essential for learning and improvement. Intrinsic feedback comes from within, e.g., feeling the correctness of a movement. Extrinsic feedback is provided by external sources such as a coach or video replay. Knowledge of results tells the performer about the outcome, while knowledge of performance focuses on the quality of the movement. Concurrent feedback is given during the activity, and terminal feedback after.
反馈对学习和提高至关重要。内在反馈来自身体内部，如感觉动作是否正确。外在反馈由教练或录像回放等外部来源提供。结果反馈告知执行者最终结果，而表现反馈关注动作质量。同步反馈在活动中给予，终末反馈在活动后提供。
11. Social and Ethical Factors | 社会与伦理因素
Participation in physical activity is influenced by age, gender, disability, socioeconomic status, ethnicity and opportunity. Barriers include lack of time, cost, access to facilities, cultural norms and role models. Initiatives like ‘Sport for All’ aim to increase inclusion.
体育参与受年龄、性别、残疾、社会经济地位、种族和机会的影响。障碍包括缺少时间、费用、设施可及性、文化规范和榜样。像“全民运动”之类的倡议旨在提升参与度。
Commercialisation has transformed sport through sponsorship, media coverage and professionalism. While it brings money and exposure, it can also lead to rule changes to suit broadcasters, high‑pressure environments and inequity.
商业化通过赞助、媒体覆盖和职业化改变了体育。它虽带来资金和曝光，但也可能导致为迎合转播方修改规则、高压环境和不公平现象。
Performance‑enhancing drugs (PEDs) present a major ethical issue. Stimulants, anabolic steroids, beta‑blockers and blood doping each carry health risks and violate fair play. Drug testing and education are vital to protect the integrity of sport. Ethical debates also include violence, gamesmanship and the use of technology.
兴奋剂的使用是重大伦理问题。刺激剂、合成类固醇、β‑受体阻滞剂和血液回输各有健康风险并违反公平竞赛原则。药检和教育对保护体育的诚信至关重要。伦理讨论还涉及暴力、投机取巧行为和科技应用。
12. Safety and Injury Prevention | 运动安全与损伤预防
A well‑structured warm‑up prepares the body gradually for exercise by raising heart rate, increasing blood flow to muscles and mobilising joints. A cool‑down helps remove waste products and reduces muscle soreness. Both reduce injury risk.
结构合理的热身通过提升心率、增加肌肉血流量和活动关节，使身体为运动做好准备。而放松活动有助于清除废物并减轻肌肉酸痛。两者都能降低受伤风险。
Common injuries in sport include strains (muscle/tendon), sprains (ligament), fractures and concussion. Prevention strategies include wearing appropriate protective equipment, adhering to rules, maintaining fitness levels and using correct technique. R.I.C.E. (Rest, Ice, Compression, Elevation) is the immediate treatment for soft‑tissue injuries.
运动中常见损伤包括拉伤（肌肉/肌腱）、扭伤（韧带）、骨折和脑震荡。预防策略包括穿戴适当护具、遵守规则、保持体能水平和采用正确技术。R.I.C.E.（休息、冰敷、加压、抬高）是软组织损伤的即时处理方法。
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