📚 Year 12 WJEC Physical Education: Core Knowledge Review | Year 12 WJEC 体育：核心知识点梳理
This article provides a clear and structured overview of the core topics in the Year 12 WJEC Physical Education specification. From the skeletal and muscular systems to sport psychology and socio‑cultural influences, each section highlights the essential knowledge needed to build a solid foundation for your AS examinations.
本文清晰梳理 Year 12 WJEC 体育课程的核心主题，涵盖骨骼肌肉系统、运动心理学以及社会文化影响等关键领域，为你的 AS 考试奠定坚实基础。
1. Skeletal and Muscular Systems | 骨骼与肌肉系统
The skeletal system provides support, protection, movement, mineral storage and blood cell production. Bones are classified into long, short, flat, irregular and sesamoid types, each adapted for its function.
骨骼系统提供支撑、保护、运动、矿物质储存和血细胞生成等功能。骨骼分为长骨、短骨、扁骨、不规则骨和籽骨，每种类型都适应其特定功能。
Joints are where two or more bones meet. Synovial joints – such as the ball‑and‑socket (hip), hinge (elbow), pivot (neck) and condyloid (wrist) – allow a range of movements including flexion, extension, abduction, adduction, rotation and circumduction.
关节是两块或以上骨骼的连接处。滑膜关节如球窝关节（髋关节）、铰链关节（肘关节）、车轴关节（颈部）和椭圆关节（腕关节），可完成屈、伸、外展、内收、旋转和环转等动作。
Muscles work in antagonistic pairs. The agonist (prime mover) contracts to produce movement, while the antagonist relaxes. For example, during elbow flexion the biceps brachii is the agonist and the triceps brachii is the antagonist.
肌肉以拮抗对的形式工作。主动肌（原动肌）收缩产生动作，拮抗肌则放松。例如，肘关节屈曲时，肱二头肌为主动肌，肱三头肌为拮抗肌。
2. Cardiorespiratory System | 心肺系统
The cardiovascular system consists of the heart, blood vessels and blood. The cardiac cycle includes diastole (relaxation and filling) and systole (contraction and ejection). Stroke volume, heart rate and cardiac output (Q = SV × HR) determine the delivery of oxygen to working muscles.
心血管系统由心脏、血管和血液组成。心动周期包括舒张期（放松和充盈）与收缩期（收缩和射血）。每搏输出量、心率和心输出量（Q = SV × HR）共同决定向工作肌肉输送氧气的效率。
The respiratory system facilitates gas exchange at the alveoli. Tidal volume, inspiratory reserve volume, expiratory reserve volume and vital capacity are key lung volumes. During exercise, respiratory rate and tidal volume increase to meet elevated oxygen demand.
呼吸系统在肺泡处进行气体交换。潮气量、补吸气量、补呼气量和肺活量是关键肺容量指标。运动时，呼吸频率和潮气量增加以满足增高的需氧量。
The vascular shunt mechanism redirects blood flow away from non‑essential organs towards active muscles through vasoconstriction and vasodilation, regulated by the vasomotor centre.
血管分流机制通过血管舒缩中枢控制的血管收缩与舒张，将血流从非必需器官重新分配至活跃的肌肉。
3. Neuromuscular System | 神经肌肉系统
A motor unit consists of a motor neuron and all the muscle fibres it innervates. The ‘all‑or‑none’ law states that when a motor unit is stimulated, all its fibres contract maximally or not at all.
运动单位由运动神经元及其支配的所有肌纤维组成。“全或无”定律指出，运动单位受刺激时，其所有肌纤维要么全部最大收缩，要么完全不收缩。
Muscle fibre types are categorised as slow‑oxidative (Type I), fast‑oxidative‑glycolytic (Type IIa) and fast‑glycolytic (Type IIx). Type I fibres are fatigue‑resistant and suited to endurance activities, while Type IIx fibres generate rapid, powerful contractions but fatigue quickly.
肌纤维类型分为慢缩氧化型（I 型）、快缩氧化酵解型（IIa 型）和快缩酵解型（IIx 型）。I 型纤维抗疲劳，适合耐力活动；IIx 型纤维产生快速、有力的收缩，但易疲劳。
The sliding filament theory explains muscle contraction: myosin heads pull actin filaments towards the centre of the sarcomere in the presence of calcium ions and ATP, shortening the muscle fibre.
肌丝滑动学说解释肌肉收缩：在钙离子和 ATP 存在下，肌球蛋白头将肌动蛋白丝拉向肌节中央，使肌纤维缩短。
4. Biomechanics of Movement | 运动生物力学
Newton’s three laws of motion underpin all human movement. The law of inertia, acceleration (F = ma) and action‑reaction explain how forces initiate, change and interact during sports performance.
牛顿三大运动定律是所有人体运动的基础。惯性定律、加速度定律（F = ma）和作用力与反作用力定律解释了运动中力的启动、变化和相互作用。
Levers in the body consist of a fulcrum (joint), effort (muscle force) and load (resistance). First‑class (neck), second‑class (ankle during plantarflexion) and third‑class levers (elbow during flexion) provide different mechanical advantages. Most body levers are third‑class, favouring speed and range of motion over force.
人体杠杆由支点（关节）、力点（肌肉力）和阻力点（负荷）构成。第一类（颈部）、第二类（踝跖屈时）和第三类（肘屈时）杠杆提供不同的机械效益。人体大多数杠杆为第三类，以速度和活动范围为优先于力量。
Planes of movement – sagittal, frontal and transverse – and their corresponding axes (mediolateral, anteroposterior and longitudinal) are used to analyse sporting actions. For instance, a forward roll occurs in the sagittal plane about a mediolateral axis.
运动平面（矢状面、额状面、水平面）及其对应的轴（内外轴、前后轴、纵轴）用于分析运动动作。例如，前滚翻发生在矢状面绕内外轴进行。
5. Energy Systems | 能量系统
ATP (adenosine triphosphate) is the immediate energy source for muscle contraction. The body resynthesises ATP through three energy systems: the ATP‑PC system, the anaerobic glycolytic system and the aerobic system.
ATP（三磷酸腺苷）是肌肉收缩的直接能源。人体通过三种能量系统再合成 ATP：ATP‑PC 系统、无氧醣酵解系统和有氧系统。
The ATP‑PC system provides energy for intense bursts lasting up to 10 seconds without oxygen, using stored phosphocreatine. The anaerobic glycolytic system breaks down glucose without oxygen, producing lactic acid and sustaining activity for up to approximately 90 seconds.
ATP‑PC 系统利用储存的磷酸肌酸，为长达约 10 秒的高强度爆发提供能量，无需氧气。无氧醣酵解系统在无氧条件下分解葡萄糖，产生乳酸，可维持约 90 秒的运动。
The aerobic system generates large amounts of ATP in the presence of oxygen through the Krebs cycle and electron transport chain. It fuels prolonged, low‑to‑moderate intensity exercise and uses carbohydrates, fats and proteins as substrates.
有氧系统在有氧条件下，通过克雷布斯循环和电子传递链产生大量 ATP。它依赖糖类、脂肪和蛋白质为底物，为长时间低至中等强度运动提供能量。
6. Principles and Methods of Training | 训练原则与方法
Effective training programmes are built on the SPORT principles: Specificity, Progression, Overload, Reversibility and Tedium. Overload can be manipulated through the FITT variables – Frequency, Intensity, Time and Type.
有效的训练计划建立在 SPORT 原则之上：专项性、渐进性、超负荷、可逆性和厌烦性。超负荷可通过 FITT 变量——频度、强度、时间和类型来调控。
Methods of training include continuous, interval, fartlek, circuit, weight and plyometric training. Each method targets specific components of fitness; for example, interval training develops speed and anaerobic power, while continuous training enhances aerobic endurance.
训练方法包括持续训练、间歇训练、法特莱克训练、循环训练、负重训练和增强式训练。每种方法针对特定的体能要素；例如，间歇训练提升速度与无氧能力，持续训练增强有氧耐力。
Periodisation divides the training year into macrocycles, mesocycles and microcycles to optimise performance and prevent overtraining. The preparatory, competitive and transition phases ensure athletes peak at the right time.
周期化将训练年划分为大周期、中周期和小周期，以优化运动表现并防止过度训练。准备期、比赛期和过渡期确保运动员在恰当时间达到巅峰状态。
7. Skill Acquisition | 运动技能学习
Skills can be classified along continua: open‑closed, gross‑fine, self‑paced‑externally paced, and discrete‑serial‑continuous. An open skill (e.g. a football pass) is affected by the environment; a closed skill (e.g. a tennis serve toss) is performed in a predictable setting.
运动技能可按连续体分类：开放—封闭、粗大—精细、自定步调—外部步调、分立—序列—连续。开放技能（如足球传球）受环境影响；封闭技能（如网球发球抛球）在可预测环境中执行。
Information processing models explain how performers take in, interpret and respond to stimuli. The basic model includes input (sensory information), decision‑making (perceptual mechanism) and output (effector mechanism), followed by feedback.
信息加工模型解释运动员如何接收、解读和回应刺激。基本模型包括输入（感觉信息）、决策（知觉机制）和输出（效应器机制），随后再通过反馈进行修正。
Learning theories such as operant conditioning, observational learning (Bandura) and schema theory guide coaching practice. Bandura’s model emphasises attention, retention, motor reproduction and motivation as key processes for modelling behaviour.
操作条件反射、观察学习（班杜拉）和图式理论等学习理论指导着训练实践。班杜拉的模型强调注意、保持、动作复现和动机是模仿行为的关键过程。
8. Sport Psychology | 运动心理学
Anxiety in sport is divided into trait anxiety (personality disposition) and state anxiety (temporary emotional response). The multidimensional anxiety theory distinguishes between cognitive anxiety (worries, negative thoughts) and somatic anxiety (physiological arousal such as increased heart rate).
运动焦虑分为特质焦虑（人格倾向）和状态焦虑（暂时性情绪反应）。多维焦虑理论区分了认知焦虑（担忧、负面思维）与躯体焦虑（心率加快等生理唤醒）。
Arousal and performance are linked by theories such as the inverted‑U hypothesis, drive theory and the catastrophe model. The inverted‑U theory suggests optimal performance occurs at moderate arousal, while the catastrophe model explains how cognitive anxiety can cause a sudden drop in performance if arousal exceeds a threshold.
唤醒与表现的关系可通过倒 U 型假说、驱力理论和突变模型加以解释。倒 U 型理论认为中等唤醒带来最佳表现，而突变模型则解释当唤醒超过某个阈值时，认知焦虑可导致表现急剧下降。
Aggression can be hostile (intent to harm) or instrumental (aiming to win). The instinct theory, frustration‑aggression hypothesis and social learning theory offer different explanations for aggressive behaviour in sport.
攻击行为可分为敌意性（意图伤害）和工具性（旨在获胜）。本能论、挫折—攻击假说和社会学习理论对运动中的攻击行为提供了不同解释。
9. Sport and Society | 体育与社会
Sports participation is influenced by social factors such as class, gender, ethnicity and disability. Social stratification and economic barriers often lead to under‑representation of certain groups in particular sports.
体育参与受阶级、性别、种族和残障等社会因素影响。社会分层和经济障碍往往导致特定群体在部分运动项目中的参与不足。
The commercialisation of sport involves sponsorship, media rights and merchandising. The ‘golden triangle’ – sport, business and media – now dominates elite performance, shaping rules, schedules and the values associated with sport.
体育商业化涉及赞助、转播权和商品销售。“金三角”——体育、商业和媒体——如今主导着精英运动的表现，塑造了规则、赛程以及与体育相关的价值观念。
Ethical issues such as doping, match fixing and deviance challenge the integrity of sport. The World Anti‑Doping Agency (WADA) enforces a set of banned substances and methods, and athletes must follow strict therapeutic use exemption (TUE) procedures.
兴奋剂、赛果操控和越轨行为等伦理问题挑战着体育的诚信。世界反兴奋剂机构（WADA）执行一系列禁用物质和方法，运动员须遵循严格的治疗用药豁免（TUE）程序。
10. Nutrition and Performance | 营养与运动表现
A balanced diet for athletes includes macronutrients – carbohydrates, fats and proteins – and micronutrients such as vitamins and minerals. Carbohydrate loading can enhance endurance performance by maximising glycogen stores.
运动员的均衡饮食包括宏量营养素——碳水化合物、脂肪和蛋白质——以及维生素和矿物质等微量营养素。醣原负荷法可通过最大限度增加肌醣原储备来提升耐力表现。
Hydration is critical; even 2% dehydration can impair performance. Hypotonic, isotonic and hypertonic drinks serve different purposes before, during and after exercise.
补水至关重要；即便是 2% 的脱水也会损害运动表现。低渗、等渗和高渗饮料在运动前、中、后期发挥不同作用。
Ergogenic aids such as creatine, caffeine and sodium bicarbonate are widely used, but their legality and safety vary. Athletes must evaluate the evidence, potential side effects and WADA status before using any supplement.
肌酸、咖啡因和碳酸氢钠等营养增补剂被广泛使用，但其合法性和安全性各不相同。运动员在使用任何补剂前，必须仔细评估证据、潜在副作用及其在 WADA 清单中的地位。
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