📚 AS WJEC Physical Education: Core Knowledge Review | AS WJEC 体育：核心知识点梳理
This article consolidates the essential topics for the AS WJEC Physical Education specification. Understanding these core concepts will help you build a solid foundation for the exams.
本文梳理了 AS WJEC 体育课程的核心主题。掌握这些基本概念将帮助你为考试打下坚实的基础。
1. Skeletal System and Joints | 骨骼系统与关节
The human skeleton provides support, protection, movement, mineral storage and blood cell production. Bones are classified as long, short, flat, irregular or sesamoid. During exercise, bones adapt by increasing density and becoming stronger.
人体骨骼提供支撑、保护、运动、矿物质储存和血细胞生成功能。骨骼分为长骨、短骨、扁骨、不规则骨和籽骨。运动时骨骼通过增加密度而变得更强壮。
Synovial joints allow free movement and contain articular cartilage, synovial fluid, joint capsule and ligaments. The main types are hinge (elbow, knee), ball and socket (hip, shoulder), pivot (neck) and gliding (carpals). Joint stability is affected by the shape of bones, ligaments and muscle tone.
滑膜关节允许自由活动，包含关节软骨、滑液、关节囊和韧带。主要类型有屈戌关节（肘、膝）、球窝关节（髋、肩）、车轴关节（颈部）和滑动关节（腕骨）。关节稳定性受骨骼形状、韧带和肌肉张力影响。
- Example: In a bicep curl, the elbow acts as a hinge joint; flexion decreases the angle.
- 示例：在肱二头肌弯举中，肘部作为屈戌关节；屈曲使关节角度减小。
- Osteoporosis can reduce bone density, increasing fracture risk – weight-bearing exercise helps prevent it.
- 骨质疏松会降低骨密度，增加骨折风险——负重练习有助于预防。
2. Muscular System and Contraction | 肌肉系统与收缩
There are three muscle types: skeletal (voluntary, striated), cardiac (involuntary, striated, heart only) and smooth (involuntary, walls of organs). Skeletal muscles work in antagonistic pairs – the agonist contracts while the antagonist relaxes.
肌肉有三种类型：骨骼肌（随意肌、横纹肌）、心肌（不随意肌、横纹肌、仅在心脏）和平滑肌（不随意肌、器官壁）。骨骼肌以拮抗配对方式工作——原动肌收缩，拮抗肌放松。
The sliding filament theory explains contraction: myosin heads pull actin filaments inward, shortening the sarcomere. This requires ATP and calcium ions. Isometric contraction involves no change in muscle length; isotonic contraction involves shortening (concentric) or lengthening (eccentric).
肌丝滑动理论解释收缩：肌球蛋白头将肌动蛋白丝向内拉，使肌节缩短。这需要 ATP 和钙离子。等长收缩不改变肌肉长度；等张收缩包括缩短（向心）或拉长（离心）。
| Contraction Type | 描述 | Example |
| Concentric | 肌肉缩短，张力恒定 | 向上阶段肱二头肌弯举 |
| Eccentric | 肌肉在张力下拉长 | 下放哑铃 |
| Isometric | 保持姿势不改变长度 | 平板支撑 |
3. Cardiovascular System and Exercise | 心血管系统与运动
The cardiovascular system consists of the heart, blood vessels and blood. Its main functions during exercise are to deliver oxygen and nutrients to muscles, remove waste products and regulate temperature.
心血管系统由心脏、血管和血液组成。运动时其主要功能是向肌肉输送氧气和营养物质、清除代谢废物并调节体温。
xercise, SV increases due to increased venous return and the Frank-Starling mechanism. Resting HR decreases with training due to cardiac hypertrophy.
心输出量 (Q) = 每搏输出量 (SV) × 心率 (HR)。在有氧运动中，每搏输出量因回心血量增加和 Frank-Starling 机制而提高。静息心率因训练导致的心脏肥大而下降。
The vascular shunt mechanism redistributes blood from organs to working muscles via vasoconstriction and vasodilation. Arteries carry blood away from the heart, veins return it, and capillaries are the site of exchange.
血管分流机制通过血管收缩和舒张将血液从器官重新分配到工作肌肉。动脉将血液带离心脏，静脉将血液送回，毛细血管是物质交换的部位。
4. Respiratory System and Gas Exchange | 呼吸系统与气体交换
The respiratory system brings oxygen into the body and removes carbon dioxide. Key structures: nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles and alveoli. Alveoli are surrounded by capillaries where gas exchange occurs by diffusion.
呼吸系统将氧气带入体内并排出二氧化碳。关键结构：鼻腔、咽、喉、气管、支气管、细支气管和肺泡。肺泡周围有毛细血管，气体交换通过扩散在此进行。
ring exercise, TV and f increase, raising VE significantly. The respiratory muscles (diaphragm and intercostals) contract more forcefully.
每分通气量 (VE) = 潮气量 (TV) × 呼吸频率 (f)。运动时，潮气量和呼吸频率增加，每分通气量显著提高。呼吸肌（膈肌和肋间肌）收缩更有力。
Oxygen diffuses from alveoli into blood and binds to haemoglobin to form oxyhaemoglobin. Bohr shift: higher CO₂ and acidity reduce haemoglobin's affinity for oxygen, aiding release at tissues. At altitude, lower partial pressure of oxygen challenges delivery.
氧气从肺泡扩散进入血液，与血红蛋白结合形成氧合血红蛋白。波尔效应：二氧化碳和酸性增加会降低血红蛋白对氧亲和力，促进组织氧释放。在高原，较低的氧分压对氧气运输构成挑战。
5. Energy Systems and ATP Production | 能量系统与 ATP 生成
Adenosine triphosphate (ATP) is the immediate energy currency. Resynthesis pathways: ATP-PC system (phosphocreatine), anaerobic glycolytic system and aerobic system. They differ in speed, capacity and fuel used.
三磷酸腺苷 (ATP) 是直接的能源货币。再合成途径有：ATP-PC 系统（磷酸肌酸）、无氧糖酵解系统和有氧系统。它们在速率、容量和所用燃料方面各不相同。
ADP + PCr → ATP + Cr
葡萄糖 → 2ATP + 丙酮酸（无氧时→乳酸）
葡萄糖 + O₂ → CO₂ + H₂O + 38ATP
ATP-PC system fuels maximal intensity efforts up to 10 seconds (e.g. 100m sprint). Anaerobic glycolysis provides energy for 30–90 seconds of high intensity, producing lactic acid. The aerobic system dominates low to moderate intensity activities lasting over 3 minutes, using carbohydrates and fats.
ATP-PC 系统为最多10秒的最大强度运动供能（如百米冲刺）。无氧糖酵解为30-90秒的高强度运动供能，并产生乳酸。有氧系统主导持续3分钟以上的中低强度活动，利用碳水化合物和脂肪。
6. Skill Classification and Abilities | 技能分类与能力
A skill is a learned, goal-directed movement. Abilities are innate, stable traits that underpin skill performance, such as hand–eye coordination or flexibility. Skills can be classified on continua: open–closed, gross–fine, discrete–serial–continuous, self-paced–externally-paced.
技能是学会的、有目标的动作。能力是与生俱来的稳定特质，支撑技能表现，如手眼协调或柔韧性。技能可在不同连续体上分类：开放–闭锁、粗大–精细、离散–序列–连续、自定节奏–外部节奏。
Open skills are performed in unpredictable environments (e.g. a pass in football); closed skills occur in stable, predictable settings (e.g. a golf swing). Gross skills involve large muscle groups; fine skills require precision and small muscles.
开放技能在不可预测的环境中执行（如足球传球）；闭锁技能在稳定、可预测的环境中进行（如高尔夫挥杆）。粗大技能使用大肌肉群；精细技能需要精确度和小肌肉。
Transfer of learning occurs when past experience influences a new skill. Positive transfer helps, negative transfer hinders; zero transfer means no effect. Bilateral transfer – learning with one limb improves performance with the other.
学习迁移发生在过去的经验影响新技能时。正迁移有帮助，负迁移有妨碍；零迁移无影响。左右迁移——用一侧肢体学习会提升另一侧的技能表现。
7. Information Processing and Memory | 信息处理与记忆
The information processing model describes how we perceive, decide and act. It includes input from senses, perception (selective attention), decision making, motor programme execution and feedback. Whiting's model adds body boundary and central mechanisms.
信息处理模型描述我们如何感知、决策和行动。它包括感官输入、知觉（选择性注意）、决策、运动程序执行和反馈。怀廷模型还加入了身体边界和中央机制。
duration; LTM stores motor programmes and experiences. Rehearsal and meaningful association help encode information into LTM.
记忆包含感觉记忆（STSS）、短时记忆（STM）和长时记忆（LTM）。短时记忆容量有限（7±2项）且持续时间短；长时记忆储存运动程序和经验。复述和有意义关联有助于将信息编码进入长时记忆。
Response time = reaction time + movement time. Hick' ore choices. A skilled performer simplifies decision making by anticipating opponent cues.
反应时间 = 反应时 + 动作时间。希克定律：反应时随选择项增多而延长。熟练运动员通过预判对手线索来简化决策。
8. Theories of Learning and Feedback | 学习理论与反馈
Operant conditioning (Skinner) involves shaping behaviour through reinforcement. Positive reinforcement (praise) strengthens behaviour; negative reinforcement (removing an unpleasant stimulus) also strengthens; punishment weakens it. Cognitive theory (Gestalt) emphasises understanding the whole skill.
操作条件反射（斯金纳）通过强化塑造行为。正强化（表扬）加强行为；负强化（移除不愉快刺激）同样加强；惩罚削弱行为。认知理论（格式塔）强调理解整个技能。
Bandura's social learning theory: observation, attention, retention, motor reproduction and motivation. Demonstrations are key. Feedback types: intrinsic (from senses), extrinsic (from coach), knowledge of results (KR), knowledge of performance (KP), positive and negative.
班杜拉的社会学习理论：观察、注意、保持、动作再现和动机。示范是关键。反馈类型：内在（来自感官）、外在（来自教练）、结果知晓（KR）、动作知晓（KP）、正面和负面。
Effective feedback should be specific, given soon after performance, and appropriate for the learner's stage. The guidance continuum moves from visual (beginner) to verbal to manual/mechanical.
有效反馈应具体、表现后及时给予，并适合学习者的阶段。指导连续体从视觉（初学者）到言语再到手动/器械。
9. Motivation and Arousal in Sport | 运动中的动机与唤醒水平
Motivation is the internal or external drive to achieve a goal. Intrinsic motivation comes from enjoyment, satisfaction or pride; extrinsic motivation involves external rewards like trophies or money. The drive theory: as arousal increases, performance improves in a linear fashion – but only for well-learned skills.
动机是达成目标的内部或外部驱动力。内在动机源于享受、满足或自豪；外在动机涉及奖杯、金钱等外部奖励。驱力理论：唤醒水平提高，表现线性改善——但仅适用于高度熟练的技能。
The inverted-U hypothesis: performance peaks at moderate arousal; too low or too high arousal harms performance. Catastrophe theory combines physiological arousal and cognitive anxiety, where a sudden drop in performance occurs under high anxiety.
倒U型假说：表现在中等唤醒时达到峰值；过低或过高的唤醒水平损害表现。突变理论结合生理唤醒和认知焦虑，在高焦虑下表现会突然崩溃。
Achievement motivation (Atkinson) considers the interaction of need to achieve (nAch) and need to avoid failure (nAf). High nAch performers seek challenging tasks; high nAf performers choose very easy or very hard tasks to protect self-esteem.
成就动机（阿特金森）考虑渴望成功（nAch）与避免失败（nAf）的相互作用。高 nAch 者选择有挑战性的任务；高 nAf 者选择极容易或极难的任务以保护自尊。
10. Sociocultural Factors and Participation | 社会文化因素与参与
Sport participation is shaped by social class, gender, race/ethnicity, disability and age. Barriers include cost, lack of facilities, discrimination and lack of role models. The participation pyramid illustrates stages from foundation (grassroots) to elite.
运动参与受社会阶层、性别、种族/民族、残疾和年龄影响。障碍包括费用、设施缺乏、歧视和榜样缺失。参与金字塔呈现从基础（草根）到精英的阶段。
UK sport organisations (Sport Wales, Sport England, UK Sport) aim to increase mass participation and develop elite talent. Commercialisation and media have transformed sport into a global business, bringing sponsorship, advertising and increased professionalism.
英国体育机构（威尔士体育局、英格兰体育局、英国体育局）旨在提高大众参与度和培养精英人才。商业化和媒体已将体育转变为全球产业，带来赞助、广告和更高的职业化水平。
Sponsorship can provide income and promote sport, but also creates pressures: sponsors may dictate schedules, and negative off-field behaviour can damage brand image. The Olympic ideal aims for peace and inclusivity, yet commercial interests sometimes conflict.
赞助能提供收入并推广运动，但也带来压力：赞助商可能安排赛程，场外负面行为可能损害品牌形象。奥林匹克理想追求和平与包容，但商业利益有时与之冲突。
11. Training Principles and Methods | 训练原则与方法
Training must follow key principles: specificity, progression, overload (FITT: Frequency, Intensity, Time, Type), reversibility and periodisation. Periodisation divides training into macrocycles, mesocycles and microcycles to peak at the right time.
训练必须遵循关键原则：专项性、渐进性、过度负荷（FITT：频率、强度、时间、类型）、可逆性和周期化。周期化将训练分为大周期、中周期和小周期，以在合适时间达到巅峰。
Aerobic training methods include continuous training (steady state, 20–80 min), fartlek (varied pace), and interval training (work:rest ratios). Anaerobic training involves high-intensity interval training (HIIT), plyometrics and sprint drills.
有氧训练方法包括持续训练（稳态，20-80分钟）、法特莱克训练（变速跑）和间歇训练（做功：休息比）。无氧训练包含高强度间歇训练 (HIIT)、超等长训练和短跑练习。
Flexibility training: static stretching (holding a position), dynamic (active movements through full range) and PNF (proprioceptive neuromuscular facilitation). A warm-up increases heart rate, muscle temperature and flexibility; a cool-down aids removal of lactate.
柔韧性训练：静态拉伸（保持姿势）、动态（主动全幅度运动）和 PNF（本体感觉神经肌肉促进法）。准备活动提升心率、肌肉温度和柔韧性；整理活动促进乳酸清除。
12. Nutrition and Ergogenic Aids | 营养与运动增强剂
A balanced diet for athletes includes carbohydrates (main fuel), fats (energy storage), proteins (growth and repair), vitamins, minerals, fibre and water. Carbohydrate loading before endurance events can maximise glycogen stores.
运动员的均衡饮食包括碳水化合物（主燃料）、脂肪（能量储备）、蛋白质（生长修复）、维生素、矿物质、纤维素和水。耐力赛事前的碳水化合物负荷可最大化糖原储备。
Hydration is critical: a loss of 2% body mass through sweating can impair performance. Isotonic drinks balance fluid, electrolytes and 6–8% carbohydrate for quick absorption. Hypotonic solutions hydrate faster; hypertonic drinks supply more carbs but slower uptake.
水分补充至关重要：通过出汗丢失2%体重即可损害表现。等渗饮料平衡液体、电解质和6-8%的碳水化合物以便快速吸收。低渗溶液补水更快；高渗饮料提供更多碳水但吸收较慢。
Ergogenic aids: legal aids include creatine (improves repeat sprints), caffeine (enhances alertness), sodium bicarbonate (buffers lactate). Illegal aids like anabolic steroids and EPO carry health risks and are banned. Ethical considerations focus on fairness and the spirit of sport.
运动增强剂：合法助剂包括肌酸（改善反复冲刺）、咖啡因（提高警觉）、碳酸氢钠（缓冲乳酸）。合成类固醇和促红细胞生成素等非法药物带来健康风险并遭禁用。伦理考量聚焦公平与体育精神。
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