📚 Year 9 WJEC PE: Core Knowledge Review | Year 9 WJEC 体育：核心知识点梳理
This article provides a structured revision of the key topics covered in Year 9 WJEC Physical Education. From the components of fitness to training methods, nutrition, body systems and sports psychology, each section offers a clear and concise explanation designed to support students in building a solid foundation for GCSE PE. Every key point is presented in both English and Chinese to aid bilingual understanding and exam readiness.
本文系统梳理了 Year 9 WJEC 体育课程的核心知识点，涵盖体能组成、训练方法、营养、身体系统以及运动心理学等内容。每个要点均采用中英双语对照讲解，旨在帮助学生夯实基础，为 GCSE 体育学科做好充分准备。
1. Health and Fitness | 健康与体能
Health is defined as a state of complete physical, mental and social well-being, not merely the absence of disease or infirmity. It is a holistic concept that includes emotional and social dimensions.
健康被定义为身体、心理和社会适应方面的完全良好状态，而不仅仅是没有疾病或虚弱。它是一个整体概念，包括情绪和社交层面。
Fitness, on the other hand, refers to the ability to meet the demands of the environment and to carry out daily tasks without undue fatigue. A person can be fit but not necessarily healthy if their mental or social well-being is compromised.
体能则是指满足环境需求、在没有过度疲劳的情况下完成日常活动的能力。一个人可能体能良好，但如果心理或社交健康受损，未必算得上真正健康。
Therefore, physical education aims to promote both health and fitness by encouraging regular participation in physical activity and developing an understanding of a balanced lifestyle.
因此，体育教育的目标是通过鼓励定期参与体育活动并培养对均衡生活方式的理解，同时促进健康与体能。
2. Health-related Fitness Components | 健康相关体能组成
Cardiovascular endurance is the ability of the heart, lungs and blood vessels to deliver oxygen to the working muscles during sustained physical activity. It is essential for long-distance running, cycling and swimming.
心肺耐力是指心脏、肺和血管在持续身体活动中向工作肌肉输送氧气的能力。它对长跑、骑行和游泳至关重要。
Muscular endurance is the capacity of a muscle or muscle group to perform repeated contractions over time without fatigue. Rowing and sit-up tests are common examples that require muscular endurance.
肌肉耐力是指肌肉或肌群在一段时间内进行重复收缩而不疲劳的能力。赛艇和仰卧起坐测试就是需要肌肉耐力的常见例子。
Muscular strength is the maximum force a muscle can exert in a single contraction. It is typically developed through resistance training and is important in weightlifting and rugby scrums.
肌肉力量是肌肉在单次收缩中能产生的最大力量。它通常通过抗阻训练来发展，对举重和英式橄榄球争球非常重要。
Flexibility refers to the range of motion available at a joint. Good flexibility reduces injury risk and improves posture. Gymnastics and martial arts rely heavily on this component.
柔韧性指关节可达到的运动范围。良好的柔韧性可以降低受伤风险并改善体态，体操和武术高度依赖这一素质。
Body composition describes the proportion of fat mass to lean mass (muscle, bone and organs) in the body. Maintaining a healthy body composition lowers the risk of lifestyle-related diseases.
身体成分描述了体内脂肪与去脂体重（肌肉、骨骼和器官）的比例。保持健康的身体成分可以降低患上与生活方式相关疾病的风险。
3. Skill-related Fitness Components | 技能相关体能组成
Agility is the ability to change the direction of the body quickly and accurately while maintaining control. It is vital for evasion in football and basketball.
敏捷性是指快速而准确地改变身体方向并保持控制的能力。它在足球和篮球的变向突破中至关重要。
Balance is maintaining the centre of mass over the base of support, whether stationary or moving. Gymnasts on a beam and surfers demonstrate advanced balance.
平衡是指静止或运动中保持重心在支撑面内。平衡木上的体操运动员和冲浪者都表现出高超的平衡能力。
Coordination is the smooth and efficient combination of body parts to produce a controlled movement. Hand–eye coordination is essential for catching and striking sports.
协调性指身体各部位流畅高效地配合产生受控的动作。手眼协调对于接球和击打类运动必不可少。
Reaction time is the interval between the presentation of a stimulus and the onset of a response. A sprinter reacting to the starting gun epitomises this component.
反应时间是刺激出现到反应开始之间的时间间隔。短跑选手对发令枪的反应典型地体现了这一能力。
Speed is the rate at which an individual can move the body or body parts over a distance. It is a combination of stride frequency and length in running.
速度是身体或身体部位在一定距离内移动的快慢。跑步中速度取决于步频与步幅的结合。
Power is the product of strength and speed – the ability to generate maximal force quickly. Explosive actions such as jumping and throwing depend on power.
爆发力是力量与速度的乘积，即快速产生最大力量的能力。跳跃和投掷等爆发性动作都依赖爆发力。
4. Principles of Training: FITT and SPOR | 训练原则：FITT 与 SPOR
The FITT principle is used to structure effective training sessions. Frequency refers to how often you train, Intensity to how hard you work, Time to the duration of the session, and Type to the method of training chosen.
FITT 原则用于安排有效的训练计划。频率指多久训练一次，强度指训练有多刻苦，时间指训练持续多久，类型指所选的训练方法。
Specificity means that training should be relevant to the demands of the sport or goal. A marathon runner must focus on cardiovascular endurance rather than maximal strength.
专项性指训练必须与运动项目或目标的需求相关。马拉松选手应侧重心肺耐力，而不是最大力量。
Progressive overload involves gradually increasing the training stimulus (e.g. heavier weights, longer distance) to force the body to adapt and improve. Without overload, fitness plateaus.
渐进超负荷指逐渐增加训练刺激（如更大重量、更远距离），迫使身体适应并提高。没有超负荷，体能就会停滞。
Reversibility warns that fitness gains are lost when training stops or decreases significantly. This is sometimes summarised as 'use it or lose it'.
可逆性原则提醒我们，一旦停止训练或大幅度减少训练，体能收益就会丢失。常被概括为'用进废退'。
5. Training Methods | 训练方法
Continuous training involves steady, moderate-intensity exercise without rest periods, such as a long jog or swim. It primarily develops cardiovascular endurance.
持续训练是稳定、中等强度、无休息的运动，如长跑或长距离游泳，主要发展心肺耐力。
Interval training alternates periods of high-intensity work with periods of rest or low activity. It is effective for improving speed and anaerobic capacity.
间歇训练是在高强度运动和休息或低强度活动之间交替进行，对提高速度和无氧能力很有效。
Fartlek training, which means 'speed play', combines continuous running with bursts of varied pace. It is excellent for games players who need both aerobic and anaerobic fitness.
法特莱克训练（意为'速度游戏'）兼顾持续跑和不同速度的冲刺，特别适合需要兼顾有氧和无氧体能的球类运动员。
Circuit training consists of a series of exercises performed at stations with brief rests in between. It can develop multiple fitness components depending on the exercises chosen.
循环训练由一系列站点练习和短暂间歇组成。根据所选练习，可同时发展多种体能要素。
Weight training uses free weights or machines to improve muscular strength, endurance or power. The load, repetitions and sets are manipulated according to the training goal.
重量训练利用自由重量或器械来提升肌肉力量、耐力或爆发力。重量、次数和组数依据训练目标进行调整。
6. Nutrition and Performance | 营养与运动表现
Carbohydrates are the body's main energy source, stored as glycogen in muscles and the liver. Athletes should consume complex carbohydrates for sustained energy release.
碳水化合物是身体的主要能量来源，以糖原形式储存在肌肉和肝脏中。运动员应摄入复合碳水化合物以维持能量释放。
Proteins are essential for muscle repair and growth. After intense exercise, consuming protein helps the body recover and build new tissue.
蛋白质对于肌肉修复和生长至关重要。剧烈运动后摄入蛋白质有助于身体恢复和构建新组织。
Fats provide a concentrated energy source and support vital functions such as hormone production. Unsaturated fats are the healthier choice for cardiovascular health.
脂肪提供浓缩能量并支持激素生成等重要功能。不饱和脂肪对心血管健康是更优的选择。
Hydration is critical because even a small loss of body water impairs physical and mental performance. Drinking water before, during and after exercise regulates temperature and prevents cramping.
水分补充至关重要，因为即使是少量失水也会损害身体和心理表现。运动前、中、后饮水可以调节体温并预防抽筋。
7. The Skeletal System | 骨骼系统
The skeleton provides five key functions: support for the body, protection of vital organs (e.g. skull protects the brain), movement by providing attachment points for muscles, blood cell production in bone marrow, and storage of minerals such as calcium and phosphorus.
骨骼提供五大功能：支撑身体，保护重要器官（如颅骨保护大脑），通过为肌肉提供附着点实现运动，在骨髓中生成血细胞，以及储存钙、磷等矿物质。
Synovial joints are freely movable joints that contain synovial fluid to reduce friction. The main types include ball-and-socket (hip, shoulder) and hinge joints (elbow, knee).
滑膜关节是可以自由活动的关节，内含滑液以减少摩擦。主要类型包括球窝关节（髋、肩）和铰链关节（肘、膝）。
Movement terms describe joint actions: flexion decreases the joint angle, extension increases it, abduction moves a limb away from the midline, adduction brings it towards the midline, and rotation turns the limb around its long axis.
运动术语描述关节动作：屈减小关节角度，伸增大角度，外展使肢体远离中线，内收使肢体靠近中线，旋转则绕长轴转动。
8. Muscles and Movement | 肌肉与运动
Major muscles used in sport include the biceps and triceps (arm), quadriceps and hamstrings (leg), gastrocnemius (calf), pectorals (chest), latissimus dorsi (back) and abdominals (core).
运动中用到的主要肌肉包括肱二头肌和肱三头肌（手臂）、股四头肌和腘绳肌（腿部）、腓肠肌（小腿）、胸大肌（胸部）、背阔肌（背部）以及腹肌（核心）。
Muscles work in pairs called antagonistic pairs. As one muscle contracts (agonist), the opposite muscle relaxes (antagonist). For example, during elbow flexion the biceps is the agonist and the triceps is the antagonist.
肌肉成对工作，称为拮抗肌对。一块肌肉收缩（主动肌），对侧肌肉放松（拮抗肌）。例如肘关节屈曲时，肱二头肌为主动肌，肱三头肌为拮抗肌。
Isotonic contractions involve movement and can be concentric (muscle shortens) or eccentric (muscle lengthens under tension). Isometric contractions produce force without changing muscle length, such as holding a plank.
等张收缩涉及运动，可分为向心收缩（肌肉缩短）和离心收缩（肌肉在张力下伸长）。等长收缩产生力量但不改变肌肉长度，例如平板支撑。
9. The Cardiovascular System and Exercise | 心血管系统与运动
Resting heart rate (RHR) is the number of heartbeats per minute at rest. A lower RHR usually indicates a more efficient heart. Maximum heart rate (MHR) is estimated as 220 minus age.
安静心率是休息时每分钟心跳次数，较低的安静心率通常表示心脏效率更高。最大心率估算为 220 − 年龄。
Training zones are derived from maximum heart rate. The aerobic training zone (60–80% MHR) improves cardiovascular endurance, while the anaerobic zone (80–90% MHR) develops speed and tolerance to lactic acid.
训练区间由最大心率得来。有氧训练区间（60–80% 最大心率）改善心肺耐力，无氧区间（80–90% 最大心率）发展速度和乳酸耐受能力。
egular training increases stroke volume, meaning the heart pumps more blood per beat, which improves endurance performance.
心输出量是心脏每分钟搏出的血量，计算公式为每搏输出量 × 心率。规律训练可增大每搏输出量，使心脏每搏泵出更多血液，从而提升耐力表现。
10. Introduction to Sports Psychology | 运动心理学基础
Goal setting uses the SMART acronym: goals should be Specific, Measurable, Achievable, Relevant and Time-bound. This helps athletes stay motivated and track progress.
目标设定遵循 SMART 原则：目标应具体、可衡量、可达成、相关和有时限。这有助于运动员保持动力并追踪进展。
Motivation can be intrinsic (coming from within, such as enjoyment or personal satisfaction) or extrinsic (driven by external rewards like trophies or praise). A balance of both is most sustainable for long-term participation.
动机可以是内在的（来自内部，如乐趣或个人成就感）或外在的（由外部奖励驱动，如奖杯或表扬）。内外动机平衡最有利于长期坚持运动。
Feedback is information about performance. It can be intrinsic (how it felt), extrinsic (from a coach), knowledge of results (the outcome), or knowledge of performance (how well the technique was executed). Constructive feedback guides improvement.
反馈是关于表现的信息。它可以是内在的（本体感觉）、外在的（来自教练）、结果反馈（最终成绩）或表现反馈（技术执行得如何）。建设性反馈有助于指导改进。
11. Injury Prevention and Response | 运动损伤预防与处理
A proper warm-up gradually increases heart rate, body temperature and blood flow to muscles, preparing the body for exercise and reducing injury risk. A cool-down helps remove waste products and gradually lowers heart rate.
充分的热身能逐渐提高心率、体温和肌肉血流，使身体为运动做好准备并降低受伤风险。整理活动则帮助清除代谢废物，逐渐降低心率。
Using correct equipment, clothing and technique is essential for safety. Footwear should match the surface, and proper form in weightlifting prevents strain.
使用正确的装备、着装和技术对安全至关重要。鞋履应与场地匹配，正确的举重姿势可防止拉伤。
The RICE method is the immediate treatment for soft tissue injuries: Rest stops further damage, Ice reduces swelling and pain, Compression limits inflammation, and Elevation encourages fluid drainage.
RICE 方法是软组织损伤的即时处理：休息避免二次损伤，冰敷减轻肿胀和疼痛，加压包扎限制炎症，抬高患肢促进积液回流。
12. Analysing Performance | 运动表现分析
Performance analysis involves observing and evaluating an athlete's execution of skills during practice or competition. It identifies strengths and areas for development.
表现分析包括观察和评估运动员在练习或比赛中执行技能的情况，找出优势和改进空间。
Using video footage and performance data allows more objective analysis. Athletes can compare their techniques with ideal models and monitor progress over time.
运用视频录像和运动数据可以进行更客观的分析。运动员能够将自身技术与理想模型相比较，并随时监控进步。
Effective analysis leads to targeted feedback and informed goal setting. When athletes understand what they need to improve and how to do it, training becomes more purposeful and results improve faster.
有效的分析能带来针对性反馈和明智的目标设定。当运动员明白需要改善什么以及如何改进时，训练目的性更强，成绩提高更快。
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