📚 Common Misconceptions and Corrections in IGCSE WJEC Physical Education | IGCSE WJEC 体育：常见误区与纠正方法
Students often lose marks in WJEC IGCSE Physical Education not because they lack knowledge, but because they hold onto simplified or outdated ideas. This revision guide tackles the most common misconceptions and shows how to correct them using precise terminology and applied examples from the specification.
学生在 WJEC IGCSE 体育考试中失分，往往不是因为知识不足，而是因为固守着一些简化或过时的观念。本复习指南针对最常见的误区，结合考纲要求，说明如何用准确的术语和实际例子加以纠正。
1. Health vs Fitness | 健康与体能的区别
Many candidates write ‘a fit person is healthy’ as if the two words mean the same. Health is a state of complete physical, mental and social well-being, while fitness is the ability to meet the demands of the environment. A person can be fit for one sport but have poor health due to injury, stress or poor diet.
许多考生把 ‘健康’ 和 ‘体能’ 当成同义词，写出 ‘体能好的人就健康’。健康是身体、心理和社会适应的完好状态，而体能是满足环境需求的能力。一个人可能在某项运动中体能很强，但因为伤病、压力或饮食不良而健康状况不佳。
To correct this, separate health-related components (cardiovascular endurance, muscular strength, muscular endurance, flexibility, body composition) from skill-related components (agility, balance, coordination, power, reaction time, speed). Health-related fitness supports everyday health; skill-related fitness supports sports performance.
纠正方法是，把健康相关体能（心血管耐力、肌肉力量、肌肉耐力、柔韧性、身体成分）与技能相关体能（灵敏、平衡、协调、爆发力、反应时、速度）分开。健康相关体能支撑日常健康，技能相关体能支撑运动表现。
2. FITT and SPORT Principles | FITT 与 SPORT 原则
A common error is saying FITT stands for Frequency, Intensity, Type and Time, but missing that the two T’s are Time and Type. Also, many learners describe overload simply as ‘training more’, without specifying which FITT variable changes. Overload must be progressive and specific.
常见错误是以为 FITT 中的两个 T 只是 ‘时间’，其实分别是时间（Time）和类型（Type）。许多学生还把超负荷简单说成 ‘练得更多’，而没有指出具体改变哪一个 FITT 变量。超负荷必须是渐进的、有针对性的。
To apply FITT correctly, state the exact change: for example, increase frequency from 2 to 3 sessions per week, increase intensity from 60% to 70% of maximum heart rate, increase time from 20 to 30 minutes, or change type from jogging to interval running. The SPORT principle adds Specificity, Progression, Overload, Reversibility and Tedium.
正确运用 FITT 时要说明具体变化：例如频率从每周 2 次增加到 3 次，强度从最大心率的 60% 增加到 70%，时间从 20 分钟延长到 30 分钟，或类型从慢跑改为间歇跑。SPORT 原则在此基础上增加了针对性、渐进性、超负荷、可逆性和枯燥性。
3. Heart Rate Calculations | 心率计算
Candidates often write ‘target heart rate = 220 – age’ as the whole answer. This only gives estimated maximum heart rate (HRmax), not the training zone. WJEC questions usually ask for lower and upper limits of the aerobic training zone, which are about 60-80% of HRmax.
考生常把 ‘目标心率 = 220 – 年龄’ 当作完整答案。这只是估算最大心率（HRmax），并不是训练区间。WJEC 题目通常要求计算有氧训练区的下限和上限，约为最大心率的 60%-80%。
For a 15-year-old, HRmax = 220 – 15 = 205 bpm. The aerobic training zone is 60% to 80% of 205, so 123 to 164 bpm. If the question asks for a 70% target, calculate 205 × 0.70 = 143.5, which rounds to 144 bpm.
以 15 岁学生为例，最大心率 = 220 – 15 = 205 次/分。有氧训练区是 205 的 60% 到 80%，即 123 到 164 次/分。如果题目要求 70% 的目标心率，则计算 205 × 0.70 = 143.5，约等于 144 次/分。
4. Aerobic and Anaerobic Energy Systems | 有氧与无氧能量系统
A frequent mistake is saying ‘aerobic respiration starts at the beginning of all exercise and anaerobic only starts later’. In fact, all three energy systems are active from the start, but the contribution depends on intensity and duration. Anaerobic systems dominate short, high-intensity efforts; aerobic systems dominate long, moderate efforts.
一个常见错误是认为 ‘有氧系统在运动开始时立即供能，无氧系统稍后才启动’。实际上，三大能量系统从一开始都参与供能，只是比例取决于运动强度和持续时间。无氧系统主导短时间、高强度运动；有氧系统主导长时间、中等强度运动。
For WJEC answers, use the terms ATP-PC system (or phosphocreatine system) for 0-10 seconds, anaerobic glycolytic system (lactic acid system) for roughly 10-60 seconds of high intensity, and aerobic system for longer submaximal work. Do not write ‘lactic acid causes cramp’ as a definite cause; cramps are multifactorial.
在 WJEC 答案中，0-10 秒的高强度运动主要由 ATP-PC 系统（磷酸肌酸系统）供能；约 10-60 秒的高强度运动由无氧糖酵解系统（乳酸系统）主导；更长时间的次最大强度运动由有氧系统主导。不要写 ‘乳酸导致抽筋’ 这类绝对说法，抽筋是多因素造成的。
5. Muscle Contractions and Movement | 肌肉收缩与运动
Many candidates incorrectly state that every time a muscle contracts it shortens and causes movement. Isometric contractions generate force without changing length and do not produce visible movement, such as holding a plank or gripping a racket. Isotonic contractions include concentric (shortening) and eccentric (lengthening) phases.
许多考生错误地认为肌肉每次收缩都会缩短并产生运动。等长收缩在长度不变的情况下产生力，不会产生可见运动，例如平板支撑或握住球拍。等张收缩包括向心收缩（缩短）和离心收缩（拉长）阶段。
When describing a biceps curl, the upward phase is concentric contraction of the biceps brachii, while the downward controlled phase is eccentric contraction of the same muscle. The triceps brachii acts as the antagonist. Do not say ‘the muscle relaxes’ during the eccentric phase; it is still contracting under tension.
描述肱二头肌弯举时，上举阶段是肱二头肌的向心收缩，而缓慢下放阶段是同一块肌肉的离心收缩。肱三头肌起拮抗肌作用。不要在下放阶段说 ‘肌肉放松了’；它仍在张力下收缩。
6. Levers in Sport | 运动中的杠杆
Another common misconception is confusing the lever class. In a third-class lever, the effort is between the fulcrum and the load, as in a biceps curl at the elbow. Many students mislabel this as a first-class lever because they only look at the middle position of the muscle.
另一个常见误区是搞错杠杆类别。在第三类杠杆中，动力点在支点和阻力点之间，例如肘关节处的肱二头肌弯举。许多学生仅凭 ‘肌肉在中间’ 就把它误判为第一类杠杆。
Use the acronym FLE: 1st class has Fulcrum in the middle, 2nd class has Load in the middle, 3rd class has Effort in the middle. In sport: a see-saw is first class, standing calf raise is second class, and a biceps curl or throwing action at the elbow is third class. The third-class lever allows a large range of movement and speed at the expense of force.
可用 FLE 口诀记忆：第一类杠杆支点在中间，第二类杠杆阻力点在中间，第三类杠杆动力点在中间。在运动中：跷跷板是第一类，站立提踵是第二类，肘关节的肱二头肌弯举或投掷动作是第三类。第三类杠杆牺牲力量以换取较大的活动范围和速度。
7. Skill Classification | 技能分类
Candidates often place skills on one continuum but ignore that classification is based on specific criteria and context. Open skills are performed in unpredictable environments, closed skills in stable environments. Gross skills use large muscle groups; fine skills use small muscle groups for precision. A skill like passing in football can change category depending on the situation.
考生常把技能放在一个连续体上，却忽略了分类要依据具体标准和情境。开放式技能在不可预测的环境中进行，闭锁式技能在稳定的环境中进行。粗大技能使用大肌肉群；精细技能使用小肌肉群完成精确动作。像足球传球这样的技能，在不同情境下可能归入不同类别。
For WJEC answers, always justify the classification. A tennis serve is mainly closed and gross because the environment is stable and large muscles are used, but a return of serve is open because the player must react to the opponent’s placement. Similarly, a dart throw is fine and closed; a rugby tackle is gross and open.
WJEC 答案中一定要说明分类理由。网球发球主要是闭锁式和粗大技能，因为环境稳定且使用大肌肉群；但接发球是开放式技能，因为球员必须根据对手的落点做出反应。类似地，投飞镖是精细闭锁式技能，橄榄球擒抱是粗大开放式技能。
8. Feedback and Guidance | 反馈与指导
A typical misconception is that beginners learn best from intrinsic feedback because it develops feel. In fact, novices need extrinsic feedback (coach, video, results) because they lack the internal reference to judge their own performance. Intrinsic feedback becomes more useful as the performer develops kinaesthetic awareness.
典型误区是认为初学者最适合内在反馈，因为可以培养感觉。实际上，新手需要外在反馈（教练、视频、结果），因为他们缺乏评判自身表现的内部参照。随着运动员动觉意识的发展，内在反馈才会更有用。
Pair feedback types with guidance. Visual guidance (demonstration) suits beginners; verbal guidance should be short and clear; manual/mechanical guidance can build confidence but should be reduced to avoid over-reliance. Knowledge of results is useful for early learning; knowledge of performance is more useful for refining technique later.
要把反馈类型与指导方式对应起来。视觉指导（示范）适合初学者；语言指导要简短清晰；手动/器械指导可以建立信心，但应逐步减少，避免过度依赖。结果反馈在早期学习中有用；表现反馈在后期改进技术时更有用。
9. Nutrition and Hydration | 营养与补水
Many students write ‘drink as much water as possible before exercise’ as a blanket rule. Overhydration can lead to hyponatremia (dangerously low sodium). Hydration should be planned: drink regularly before, during and after exercise according to sweat loss, not forcing excessive amounts. Carbohydrate drinks are useful for endurance events over about 60 minutes, not for short exercise.
许多学生写道 ‘运动前尽量多喝水’，把它当作通用规则。过度补水可能导致低钠血症（血钠浓度过低，非常危险）。补水应有计划：根据出汗量在运动前、中、后规律补充，而不是强迫大量饮水。碳水化合物饮料适合持续约 60 分钟以上的耐力项目，不适用于短时间运动。
For WJEC questions, mention carbo-loading only for endurance events lasting 90 minutes or more, not for a 100 m sprint. Also state that protein is needed for repair and growth, fats provide energy for low-intensity endurance
Published by TutorHao | IGCSE 体育 Revision Series | aleveler.com
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