📚 Year 13 WJEC Physical Education: Core Knowledge Revision | Year 13 WJEC 体育：核心知识点梳理
This revision guide consolidates the essential topics for Year 13 WJEC Physical Education. Covering exercise physiology, biomechanics, skill acquisition, and sport psychology, it is designed to support your exam preparation with concise, paired explanations in English and Chinese.
本复习指南整合了 Year 13 WJEC 体育的关键课题，涵盖运动生理学、生物力学、技能获取与运动心理学，通过中英文对照的简洁讲解，为你的备考提供有力支持。
1. Energy Systems and ATP Resynthesis | 能量系统与 ATP 再合成
All muscle contractions rely on adenosine triphosphate (ATP). Since ATP stores are limited, the body must continuously resynthesise ATP through three energy systems: the ATP-PC system, the glycolytic system, and the aerobic system.
所有肌肉收缩都依赖三磷酸腺苷 (ATP)。由于 ATP 储量有限，人体必须通过三个能量系统持续再合成 ATP：ATP-PC 系统、糖酵解系统和有氧系统。
The ATP-PC system provides immediate energy for high-intensity efforts lasting up to 10 seconds, using phosphocreatine (PC) to rapidly regenerate ATP without oxygen.
ATP-PC 系统利用磷酸肌酸 (PC) 快速再生 ATP，无需氧气，为持续 10 秒以内的最大强度运动提供即时能量。
The glycolytic system dominates activities lasting from 10 seconds to around 2 minutes, breaking down glucose via glycolysis to produce ATP and lactic acid, causing muscle fatigue.
糖酵解系统主导 10 秒至约 2 分钟的运动，通过糖酵解分解葡萄糖产生 ATP 和乳酸，导致肌肉疲劳。
The aerobic system yields the highest ATP output over extended periods by fully oxidising carbohydrates and fats in the presence of oxygen, supporting endurance events.
有氧系统在有氧条件下充分氧化碳水化合物和脂肪，产生最高 ATP 总量，支撑耐力型运动。
| System | Duration | Oxygen | By-product |
| ATP-PC | 0-10 s | None | Phosphate |
| Glycolytic | 10 s – 2 min | None | Lactic acid |
| Aerobic | 2 min + | Yes | CO₂, H₂O |
ATP → ADP + P + Energy
ATP → ADP + P + 能量
2. Muscle Fibre Types and Recruitment | 肌纤维类型与募集
Skeletal muscle contains three main fibre types: slow oxidative (Type I), fast oxidative glycolytic (Type IIa), and fast glycolytic (Type IIb). Each differs in contraction speed, fatigue resistance, and energy pathway dominance.
骨骼肌包含三种主要纤维类型：慢缩氧化型（I 型）、快缩氧化糖酵解型（IIa 型）和快缩糖酵解型（IIb 型），它们在收缩速度、抗疲劳性和主导能量途径上各不相同。
Type I fibres are suited for endurance activities, as they have high mitochondrial density, rich capillary networks, and utilise aerobic metabolism to maintain prolonged contractions.
I 型纤维适合耐力活动，因其线粒体密度高、毛细血管丰富，利用有氧代谢维持长时间收缩。
Type IIb fibres generate explosive force for sprinting or jumping but fatigue quickly due to limited aerobic capacity and high glycolytic enzyme concentration.
IIb 型纤维能够产生爆发力适用于短跑或跳跃，但因有氧能力有限且糖酵解酶浓度高而迅速疲劳。
The recruitment of motor units follows the size principle: smaller, fatigue-resistant motor units are activated first, with larger, high-threshold units recruited as force demands increase.
运动单位的募集遵循大小原则：较小、抗疲劳的运动单位首先被激活，随着力量需求增加，较大的高阈值单位被募集。
3. Cardiovascular Adaptations to Exercise | 运动对心血管的适应
Regular training induces significant cardiovascular adaptations. Resting heart rate decreases due to increased parasympathetic tone, while stroke volume increases because of cardiac hypertrophy and enhanced contractility.
规律训练会引起显著的心血管适应。由于副交感神经张力增强，静息心率下降；同时因心肌肥大和收缩力增强，每搏输出量增加。
Maximal cardiac output rises, largely driven by the increased stroke volume, and this elevates VO₂max according to the Fick equation: VO₂max = Cardiac Output x (a-v)O₂ difference.
最大心输出量提高，主要受每搏输出量增加的推动，根据菲克方程 VO₂max = 心输出量 × (动-静脉氧差)，这提升了最大摄氧量。
Capillarisation around trained muscles improves oxygen delivery and waste removal. Blood plasma volume also expands, aiding thermoregulation and red blood cell function.
训练肌群周围毛细血管密度增加，改善了氧气输送和废物清除。血浆容量扩大，有助于体温调节和红细胞功能。
During exercise, vascular shunt mechanism redirects blood from organs to working muscles through vasodilation and vasoconstriction, controlled by the sympathetic nervous system.
运动时，血管分流机制通过交感神经系统控制的血管舒张和收缩，将血液从内脏器官重新分配至工作肌肉。
4. Respiratory System and Gas Exchange | 呼吸系统与气体交换
Pulmonary ventilation increases during exercise through faster breathing rate and deeper tidal volume, regulated by respiratory centres in the medulla oblongata responding to chemoreceptor feedback.
运动时肺通气量增加，呼吸频率加快、潮气量加深，由延髓呼吸中枢对化学感受器反馈作出反应加以调控。
Gas exchange at the alveoli relies on partial pressure gradients: oxygen diffuses from alveolar air into the blood, while carbon dioxide moves in the opposite direction, both driven by Dalton’s law and Henry’s law.
肺泡处的气体交换依赖于分压梯度：氧气从肺泡气扩散入血，二氧化碳则反向移动，均受道尔顿定律和亨利定律驱动。
The oxyhaemoglobin dissociation curve shifts to the right during exercise due to increased temperature, CO₂, and acidity (Bohr effect), enhancing oxygen unloading at the muscles.
运动时，由于温度、CO₂ 和酸性增加（波尔效应），氧合血红蛋白解离曲线右移，促进了氧气在肌肉中的释放。
Training also strengthens respiratory muscles and improves vital capacity, while lactate buffering and ventilatory threshold adaptations delay the onset of breathlessness.
训练还能增强呼吸肌力量、提高肺活量，同时乳酸缓冲和通气阈的适应延缓了呼吸急促的出现。
5. Biomechanics: Linear and Angular Motion | 生物力学：线运动与角运动
Linear motion describes movement in a straight or curved line with all body parts travelling the same distance in the same direction. Key descriptors include displacement, velocity, acceleration, and momentum.
线运动描述沿直线或曲线移动且身体各部分均同向同距运动的情形，主要描述量包括位移、速度、加速度和动量。
Newton’s three laws of motion govern linear dynamics. The second law, F = ma, explains that acceleration is directly proportional to net force and inversely proportional to mass.
牛顿运动三定律适用于线动力学。第二定律 F = ma 解释加速度与合外力成正比，与质量成反比。
Angular motion occurs when a body rotates around an axis. Angular velocity, moment of inertia, and angular momentum are central concepts; moment of inertia depends on mass distribution relative to the axis of rotation.
角运动是指身体绕一轴旋转，角速度、转动惯量和角动量是核心概念；转动惯量取决于质量相对于转轴的分布。
Conservation of angular momentum explains why a figure skater spins faster by pulling arms in: decreasing moment of inertia increases angular velocity when angular momentum remains constant.
角动量守恒解释了花样滑冰者收臂加速旋转的原因：在角动量一定时，减小转动惯量会增大角速度。
6. Levers and Projectile Motion | 杠杆与抛物线运动
The human musculoskeletal system operates as a series of levers, each comprising a fulcrum (joint), effort (muscle force), and load (resistance). Levers are classified into first, second, and third class depending on the arrangement of these components.
人体肌肉骨骼系统以一系列杠杆运作，每个杠杆包含支点（关节）、施力（肌肉力）和负荷（阻力）；根据三者排列方式可分为第一、二、三类杠杆。
Most body levers are third-class, as the effort lies between the fulcrum and load, favouring range and speed of movement over force output.
大多数身体杠杆属于第三类，施力位于支点与负荷之间，偏重于运动幅度和速度，而非力量输出。
Projectile motion analysis examines the flight path of objects (or the body) once airborne. Key factors determining trajectory are release velocity, release angle, and release height, along with air resistance and Magnus effect for spinning objects.
抛物线运动分析研究物体（或身体）离地后的飞行轨迹。决定轨迹的关键因素包括出手速度、出手角度和出手高度，以及空气阻力和旋转物体的马格努斯效应。
For maximal horizontal distance in long jump or shot put, the optimal release angle is theoretically 45 degrees, but athlete-specific biomechanics adjust this slightly.
在跳远或铅球中，为求最大水平距离，理论最佳出手角为 45 度，但运动员特定的生物力学会对此略微调整。
7. Classification of Skills and Learning Theories | 技能分类与学习理论
Skills can be classified along continua: open-closed (environmental predictability), gross-fine (muscular involvement), discrete-serial-continuous (clear start/finish), and self-paced-externally paced (performer control).
技能可沿不同连续体分类：开放-封闭（环境可预测性）、粗大-精细（肌肉参与度）、分立-序列-连续（明确的始终）和自定步调-外部步调（执行者控制）。
Learning theories explain how skills are acquired. Operant conditioning uses reinforcement to shape behaviour, while Bandura’s social learning theory highlights observation and modelling.
学习理论解释技能获得的方式。操作性条件反射利用强化塑造行为，而班杜拉的社会学习理论强调观察和模仿。
Cognitive theories, such as the Schmidt Schema theory, emphasise memory schemas that generalise movement parameters, enabling athletes to adapt to novel situations.
认知理论（如施密特图式理论）强调概括动作参数的记忆图式，使运动员能够适应新情境。
Fitts and Posner’s stages of learning (cognitive, associative, autonomous) describe the progression from slow, error-prone performance to fluent, automatic execution.
菲茨和波斯纳的学习阶段理论（认知、联结、自主阶段）描述了从缓慢且易出错的表现到流畅自动化执行的进程。
8. Information Processing and Memory | 信息加工与记忆
Information processing models, such as Whiting’s model, explain how sensory input from the display is perceived, interpreted in the perceptual mechanism, translated by the translatory mechanism, and finally produces an response through the effector mechanism.
信息加工模型（如怀廷模型）解释来自显示器的感觉输入如何被感知机制觉察、由转换机制翻译，最终通过效应器机制产生反应。
Feedback loops correct ongoing movements or adapt future responses. Intrinsic feedback comes from proprioception, while extrinsic feedback is provided by coaches or video analysis.
反馈回路纠正正在进行的动作或调整未来的反应。内在反馈来自本体感觉，外在反馈则由教练或视频分析提供。
Memory involves short-term sensory store, short-term memory (STM), and long-term memory (LTM). Selective attention filters relevant cues into STM; rehearsal and meaningful coding transfer information to LTM.
记忆涉及瞬时感觉储存、短期记忆和长期记忆。选择性注意将相关线索滤入短期记忆；复述和有意义编码将信息转入长期记忆。
In sport, chunking, mental imagery, and reducing information load improve retrieval speed and decision-making under pressure.
在运动中，组块化、心理表象和降低信息负荷可提升检索速度与压力下的决策能力。
9. Arousal, Anxiety and Aggression | 唤醒、焦虑与攻击性
Arousal is the energised state of readiness for action. The drive theory suggests a linear relationship with performance for well-learned skills, while the inverted-U hypothesis proposes an optimal arousal level for each task.
唤醒是为行动做好准备的精力充沛状态。驱力理论认为对熟练技能而言唤醒与表现呈线性关系，而倒 U 型假说提出每项任务存在最佳唤醒水平。
Anxiety can be cognitive (worry, negative thoughts) or somatic (physical symptoms like sweating). Catastrophe theory explains how high cognitive anxiety combines with elevated somatic arousal to cause sudden performance decline.
焦虑可以是认知性的（担忧、消极思维）或躯体性的（出汗等身体症状）。突变理论解释高认知焦虑与躯体唤醒升高相结合如何导致表现突然下降。
Aggression in sport can be hostile (intent to harm) or instrumental (goal-directed within rules). Theories include instinct theory, frustration-aggression hypothesis, and social learning perspective, emphasising modelling and reinforcement.
运动中的攻击性可以是敌意性（故意伤害）或工具性（规则内目标导向）。相关理论包括本能理论、挫折-攻击假说和社会学习视角，强调模仿和强化。
Athletes can manage anxiety and aggression using relaxation techniques, breathing exercises, mental rehearsal, and cognitive restructuring.
运动员可通过放松技术、呼吸练习、心理演练和认知重建来管理焦虑和攻击性。
10. Motivation, Self-Efficacy and Attribution | 动机、自我效能与归因
Motivation is the drive to initiate and sustain effort. Intrinsic motivation comes from personal enjoyment and mastery, while extrinsic motivation relies on external rewards like trophies or praise.
动机是发起和维持努力的驱动力。内在动机源于个人享受和掌握感，而外在动机依赖于奖杯或表扬等外部奖励。
Self-efficacy (Bandura) is the belief in one’s ability to succeed. It is built through performance accomplishments, vicarious experiences, verbal persuasion, and control of physiological states.
自我效能（班杜拉）是对自身成功能力的信念，可通过表现成就、替代经验、言语说服和生理状态调控来建立。
Achievement Goal Theory distinguishes task-oriented (mastery) and ego-oriented (social comparison) goals. Coaches can foster a mastery climate to enhance persistence and enjoyment.
成就目标理论区分任务导向（掌握）和自我导向（社会比较）目标。教练可营造掌握型氛围来增强坚持性与乐趣。
Weiner’s attribution model categorises reasons for success or failure along dimensions of locus of causality, stability, and controllability. Adaptive attributions promote continued effort.
韦纳的归因模型按原因源、稳定性和可控性维度对成败归因进行分类。适应性归因能促进持续努力。
11. Group Dynamics and Leadership | 团队动力与领导力
Group cohesion is the tendency of a team to stick together and remain united in pursuit of goals. Task cohesion relates to commitment to team objectives, while social cohesion reflects interpersonal liking.
团队凝聚力指团队团结一致追求目标的倾向。任务凝聚力关乎对团队目标的承诺，而社会凝聚力反映人际关系的融洽程度。
Steiner’s model of group productivity states that actual productivity equals potential productivity minus losses due to faulty processes, such as coordination failures and social loafing.
施泰纳的团队生产力模型指出，实际生产力等于潜在生产力减去由协调失灵和社会懈怠等不良过程造成的损失。
Leadership involves influencing individuals and teams toward achieving goals. Prescribed leaders are appointed, while emergent leaders naturally gain status from the group.
领导力涉及影响个体和团队以达成目标。指定型领导者被任命，而涌现型领导者则从团队中自然获得地位。
Effective leadership styles (autocratic, democratic, laissez-faire) should match situational demands, group characteristics, and the task type, as proposed by Fiedler’s contingency model and Chelladurai’s multidimensional model.
有效领导风格（专制型、民主型、放任型）应根据情境需求、群体特征和任务类型进行匹配，如费德勒权变模型和切拉杜莱多维模型所提议。
12. Ergogenic Aids and Nutrition | 营养与辅助工具
Athletes use ergogenic aids to enhance performance, recovery, or body composition. Pharmacological aids like anabolic steroids and EPO carry health risks and are banned, while nutritional aids include creatine, caffeine, and protein supplements.
运动员使用辅助手段来提升表现、促进恢复或改善身体成分。药理辅助剂如合成代谢类固醇和 EPO 有健康风险且禁用，营养辅助剂则包括肌酸、咖啡因和蛋白质补充剂。
Balanced nutrition for athletes requires adequate macronutrients: carbohydrates for glycogen stores, proteins for muscle repair, and fats for prolonged energy. Micronutrients, hydration, and meal timing also critically affect performance.
运动员平衡营养需摄入充足的宏量营养素：碳水化合物补充糖原储备、蛋白质修复肌肉、脂肪提供持久能量。微量营养素、补水和进餐时机同样对表现有重要影响。
Carbohydrate loading maximises glycogen storage in the days before endurance events, delaying fatigue. Specific protocols combine tapered training with high-carb intake.
碳水化合物负荷法可在耐力赛事前几天最大化糖原储备、延缓疲劳，其特定方案结合了递减训练与高碳水化合物摄入。
Hydration strategies must account for electrolyte loss; even mild dehydration impairs cognitive and physical function, making pre-event, during-event, and post-event fluid plans essential.
补水策略须考虑电解质流失；即使是轻度脱水也会损害认知和身体功能，因此赛前、赛中、赛后液体计划至关重要。
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