KS3 AQA Physical Education: Key Knowledge Points Overview | KS3 AQA 体育：核心知识点梳理

📚 KS3 AQA Physical Education: Key Knowledge Points Overview | KS3 AQA 体育：核心知识点梳理

This article provides a comprehensive revision guide for key knowledge points in KS3 Physical Education, aligned with the AQA specification. It covers essential topics including health and fitness, body systems, training principles, nutrition, and movement analysis. Each concept is explained clearly to support students in consolidating their understanding and preparing for assessments.

本文为 KS3 AQA 体育课程的核心知识点提供一份全面的复习指南。涵盖健康与健身、身体系统、训练原则、营养和动作分析等重要主题，每个概念都以清晰的方式解释，帮助学生巩固理解并为评估做好准备。

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1. Health, Fitness and Well-being | 健康、健身与幸福

Health is defined as a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity. Being healthy involves looking after all aspects of your body and mind, including emotional stability and positive relationships with others.

健康被定义为身体、心理和社会完全良好的一种状态，而不仅仅是没有疾病或虚弱。保持健康涉及照顾你身体和心灵的所有方面，包括情绪稳定以及与他人建立积极的关系。

Fitness is the ability to meet the demands of the environment. A fit person can carry out everyday tasks without excessive fatigue and still have energy left for leisure activities and emergencies. Fitness can be broken down into a number of different components, each of which contributes to overall physical capability.

健身是满足环境需求的能力。一个健康水平高的人能够在不感到过度疲劳的情况下完成日常任务，并且还有多余的能量用于休闲活动和应对紧急情况。健身可以分解为多个不同的要素，每个要素都有助于整体身体能力。

Well-being refers to feeling good and functioning well. It includes being satisfied with life, feeling a sense of purpose, and being able to manage stress. Regular physical activity is a powerful way to improve well-being because it can boost mood, reduce anxiety, and build social connections through team sports.

幸福是指感觉良好和功能运转正常。它包括对生活满意、有目标感以及能够管理压力。规律的体育活动是改善幸福感的一种强大方式，因为它可以提升情绪、减少焦虑，并通过团队运动建立社交联系。

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2. Components of Fitness | 体能要素

Physical fitness can be divided into health-related components and skill-related components. Health-related components contribute to maintaining health and preventing lifestyle diseases. Skill-related components are more important for sporting performance and the ability to perform complex movements.

体适能可以分为健康相关要素和技能相关要素。健康相关要素有助于维持健康和预防生活方式疾病。技能相关要素对于运动表现和执行复杂动作的能力更为重要。

The health-related components include cardiovascular endurance (the ability of the heart and lungs to supply oxygen), muscular endurance (the ability of muscles to work over time without tiring), muscular strength (the maximum force a muscle can produce), flexibility (the range of motion around a joint), and body composition (the percentage of fat, muscle, and bone in the body).

健康相关要素包括心血管耐力（心肺供氧的能力）、肌肉耐力（肌肉长时间工作而不疲劳的能力）、肌肉力量（肌肉能产生的最大力量）、柔韧性（关节周围的活动范围）和身体成分（体内脂肪、肌肉和骨骼的百分比）。

The skill-related components are agility (the ability to change direction quickly), balance (maintaining equilibrium), coordination (using different body parts together smoothly), power (strength performed quickly, also known as explosive strength), reaction time (the time taken to respond to a stimulus), and speed (the rate at which an individual can perform a movement or cover a distance).

技能相关要素包括敏捷（快速改变方向的能力）、平衡（保持稳态）、协调（顺畅地同时使用身体不同部位）、爆发力（快速表现力量，也称爆发性力量）、反应时（对刺激做出反应所需的时间）和速度（个体完成一个动作或覆盖一段距离的速率）。

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3. The Skeletal System | 骨骼系统

The skeleton has five major functions: it provides shape and support for the body, protects vital organs such as the brain and the heart, allows movement by serving as an anchor for muscles, produces red and white blood cells inside bone marrow, and stores essential minerals like calcium and phosphorus.

骨骼有五大功能：为身体提供形状和支撑，保护大脑和心脏等重要器官，通过作为肌肉的锚点使人能够运动，在骨髓中生成红细胞和白细胞，以及储存钙和磷等重要矿物质。

Key bones you need to identify include the skull, clavicle, scapula, humerus, radius, ulna, vertebral column, pelvis, femur, patella, tibia, fibula, and tarsals. Joints are the points where two or more bones meet, and they allow varying degrees of movement. The main types of synovial joint are ball-and-socket joints (e.g. shoulder and hip, allowing movement in many directions) and hinge joints (e.g. elbow and knee, allowing flexion and extension only).

你需要识别的关键骨骼包括颅骨、锁骨、肩胛骨、肱骨、桡骨、尺骨、脊柱、骨盆、股骨、髌骨、胫骨、腓骨和跗骨。关节是两块或多块骨骼相遇之处，它们允许不同程度的运动。滑液关节的主要类型是球窝关节（例如肩部和髋部，允许多方向运动）和铰链关节（例如肘部和膝部，仅允许屈曲和伸展）。

Movement at joints is brought about by muscles pulling on bones, and the type of movement depends on the joint structure. Terms for movement include flexion (decreasing the angle at a joint), extension (increasing the angle), abduction (moving away from the body’s midline), adduction (moving towards the midline), and rotation (turning around an axis).

关节处的运动由肌肉牵拉骨骼产生，运动类型取决于关节结构。运动术语包括屈曲（减小关节角度）、伸展（增大角度）、外展（远离身体中线）、内收（靠近中线）和旋转（绕轴转动）。

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4. The Muscular System | 肌肉系统

Muscles are responsible for producing movement, maintaining posture, and generating heat. Key muscles for KS3 include the biceps and triceps in the arm; deltoids in the shoulder; pectorals in the chest; abdominals in the stomach area; quadriceps and hamstrings in the thigh; and gastrocnemius in the calf.

肌肉负责产生运动、维持姿势和产生热量。KS3 需要掌握的关键肌肉包括手臂的肱二头肌和肱三头肌；肩部的三角肌；胸部的胸大肌；腹部的腹直肌；大腿的股四头肌和腘绳肌；以及小腿的腓肠肌。

Muscles often work in pairs called antagonistic pairs. When one muscle contracts (the agonist), the other relaxes (the antagonist). A classic example is the biceps and triceps during a bicep curl: the biceps contracts to lift the forearm (flexion), while the triceps relaxes. To lower the weight (extension), the triceps contracts and the biceps relaxes.

肌肉通常成对工作，称为拮抗肌对。当一块肌肉收缩（主动肌）时，另一块松弛（拮抗肌）。一个经典例子是肱二头肌弯举中的肱二头肌和肱三头肌：肱二头肌收缩以抬起前臂（屈曲），此时肱三头肌松弛。放下重量（伸展）时，肱三头肌收缩而肱二头肌松弛。

There are different types of muscle contraction. Isotonic contractions involve a change in muscle length (concentric when the muscle shortens, and eccentric when it lengthens under tension). Isometric contractions occur when the muscle stays the same length while producing force, such as when holding a plank position.

肌肉收缩有不同的类型。等张收缩涉及肌肉长度的变化（向心收缩时肌肉缩短，离心收缩时肌肉在张力下拉长）。等长收缩发生在肌肉产生力量但长度保持不变时，例如保持平板支撑姿势时。

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5. The Cardiovascular and Respiratory Systems | 心血管与呼吸系统

The cardiovascular system consists of the heart, blood, and blood vessels. Its main role is to transport oxygen, nutrients, and waste products around the body. The heart is divided into four chambers: two atria (upper) and two ventricles (lower). Deoxygenated blood is pumped to the lungs, and oxygenated blood is pumped to the rest of the body.

心血管系统由心脏、血液和血管组成。它的主要作用是运输氧气、营养物质和废物至全身。心脏分为四个腔室：两个心房（上方）和两个心室（下方）。缺氧血被泵至肺部，含氧血被泵至身体其他部位。

Arteries carry blood away from the heart, veins carry blood toward the heart, and capillaries are tiny vessels where gas exchange occurs. Important measures of cardiovascular function include heart rate (HR – beats per minute), stroke volume (SV – the amount of blood pumped per beat), and cardiac output (Q). Cardiac output is calculated as Q = SV × HR.

动脉将血液带离心脏，静脉将血液带回心脏，毛细血管是进行气体交换的微小血管。心血管功能的重要指标包括心率（HR，每分钟搏动次数）、每搏输出量（SV，每次搏动泵出的血量）和心输出量（Q）。心输出量的计算公式为 Q = SV × HR。

The respiratory system brings oxygen into the body and removes carbon dioxide. Air travels through the nose/mouth, trachea, bronchi, and bronchioles before reaching the alveoli in the lungs. Here, oxygen diffuses into the blood, and carbon dioxide diffuses out. The diaphragm and intercostal muscles control breathing movements.

呼吸系统将氧气带入体内并排出二氧化碳。空气在到达肺部的肺泡之前依次经过鼻/口、气管、支气管和细支气管。在此，氧气扩散进血液，二氧化碳扩散出血液。膈肌和肋间肌控制呼吸运动。

During exercise, breathing rate and depth increase to meet the higher oxygen demand. The intercostal muscles and diaphragm work harder to expand the chest cavity, allowing more air in. This process is called increased minute ventilation.

运动过程中，呼吸频率和深度增加以满足更高的需氧量。肋间肌和膈肌更努力工作以扩张胸腔，让更多空气进入。这一过程称为每分通气量增加。

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6. Effects of Exercise | 运动效果

Engaging in physical activity produces immediate (short-term) effects and long-term adaptations in the body. Understanding these helps explain why regular exercise is beneficial and how athletes improve their performance.

进行体育锻炼会在身体中产生即时的（短期）效果和长期的适应。理解这些有助于解释为什么规律运动有益以及运动员如何提高表现。

Short-term effects of exercise include an increase in heart rate to deliver more oxygen, a rise in breathing rate to remove carbon dioxide, an elevation in body temperature due to muscle activity, and sweating to cool the body. You may also experience muscle fatigue and a temporary reduction in muscle strength if the exercise is intense.

运动的短期效果包括心率增加以输送更多氧气，呼吸频率升高以清除二氧化碳，因肌肉活动导致体温升高，以及出汗以冷却身体。如果运动强度大，你可能还会感到肌肉疲劳和肌肉力量暂时下降。

Long-term effects of regular training involve adaptations that improve efficiency. The resting heart rate decreases because the heart becomes stronger and pumps more blood per beat (increased stroke volume). The heart may increase in size (cardiac hypertrophy). Lung capacity and the strength of respiratory muscles improve, and the density of capillaries in muscles increases, enhancing oxygen delivery.

规律训练的长期效果涉及提高效率的适应。静息心率下降，因为心脏变得更强壮并且每次搏动泵出更多血液（每搏输出量增加）。心脏可能会增大（心脏肥大）。肺活量和呼吸肌力量改善，肌肉中毛细血管密度增加，增强了氧气输送。

Muscles undergo hypertrophy (increase in size) and become more efficient at using oxygen. Bones become denser and stronger, and joints become more stable through strengthened ligaments and tendons. There is also a positive impact on mental health, including reduced stress and improved self-esteem.

肌肉会变得肥大（体积增大）并更有效地利用氧气。骨骼变得更致密强壮，关节因韧带和肌腱的增强而变得更加稳定。对心理健康也有积极影响，包括减轻压力和增强自尊。

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7. Principles of Training | 训练原则

To improve fitness effectively, training must follow certain principles. The main principles are often remembered using the acronyms SPORT and FITT. These help ensure that training is planned, progressive, and avoids injury or plateau.

为了有效提高健身水平，训练必须遵循某些原则。主要原则常通过缩略词 SPORT 和 FITT 来记忆。这有助于确保训练有计划、循序渐进，并避免受伤或进入平台期。

SPORT stands for Specificity (training must be relevant to the sport or goal), Progression (gradually increasing the demands on the body), Overload (working harder than normal to cause adaptation), Reversibility (fitness is lost when training stops), and Tedium (variety is needed to avoid boredom).

SPORT 代表：针对性（训练必须与运动项目或目标相关）、渐进性（逐步增加对身体的需求）、超负荷（比平时更努力以促使身体适应）、可逆性（停止训练后体能会消退）和枯燥性（需要多样性以避免厌倦）。

Overload can be applied by manipulating the FITT variables: Frequency (how often you train), Intensity (how hard you work), Time (how long each session lasts), and Type (the kind of exercise). For example, to improve cardiovascular endurance you might increase the frequency from three to four sessions a week, or increase the duration of each session.

超负荷可通过调整 FITT 变量来施加：频率（多久训练一次）、强度（训练有多努力）、时间（每次训练持续多长时间）和类型（运动种类）。例如，为了提高心血管耐力，你可以将频率从每周三次增加到四次，或者延长每次训练的时长。

It is also important to consider rest and recovery. The body adapts and becomes stronger during rest periods, not during the training itself. Overtraining can lead to injury, fatigue, and a decrease in performance. A balanced training programme includes adequate sleep and rest days.

考虑休息和恢复也很重要。身体在休息期间（而非训练过程中）适应并变得更强。过度训练会导致受伤、疲劳和表现下降。一个均衡的训练计划应包括充足的睡眠和休息日。

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8. Methods of Training | 训练方法

Different methods of training target different components of fitness. Choosing the appropriate method depends on your sport, current fitness level, and personal goals. A well-rounded plan often combines several methods.

不同的训练方法针对不同的体能要素。选择合适的方法取决于你的运动项目、当前体能水平和个人目标。全面的计划通常会结合数种方法。

Continuous training involves exercising at a steady pace for an extended period without rest, such as long-distance running, cycling, or swimming. It primarily improves cardiovascular endurance and contributes to fat burning. The intensity is usually low to moderate and the duration is at least 20 minutes.

持续训练涉及以稳定速度长时间运动而不休息，例如长跑、骑行或游泳。它主要提高心血管耐力并有助于燃烧脂肪。强度通常为低至中等，持续时间至少20分钟。

Interval training alternates periods of high-intensity exercise with periods of rest or low-intensity recovery. It is very effective for improving speed, cardiovascular fitness, and power. For example, a runner might sprint for 30 seconds and then jog or walk for 60 seconds, repeating the cycle several times.

间歇训练在高强度运动阶段与休息或低强度恢复阶段之间交替进行。它对于提高速度、心血管适能和爆发力非常有效。例如，跑者可能冲刺30秒，然后慢跑或步行60秒，多次重复该循环。

Circuit training involves completing a series of exercise stations in sequence, targeting different muscle groups or fitness components. There is minimal rest between stations. It can be designed to improve general fitness, muscular endurance, or both. A typical circuit might include press-ups, squats, sit-ups, and skipping.

循环训练涉及按顺序完成一系列练习站点，针对不同肌肉群或体能要素。站点之间休息时间很短。它可以被设计用来提高整体体能、肌肉耐力或两者兼有。一个典型的循环训练可能包括俯卧撑、深蹲、仰卧起坐和跳绳。

Weight training uses resistance to build muscular strength, endurance, or power. It can involve free weights, machines, or body weight. Repetitions (reps) and sets are manipulated: high weight and low reps build strength, while low weight and high reps build endurance. Flexibility training, such as static and dynamic stretching, maintains and improves the range of motion.

重量训练使用阻力来增强肌肉力量、耐力或爆发力。它可涉及自由重量、器械或自身体重。通过调整重复次数和组数来实现不同目标：高重量、低次数发展力量，低重量、高次数发展耐力。柔韧性训练，如静态和动态拉伸，保持和提高活动范围。

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9. Nutrition and Hydration | 营养与水分

Proper nutrition and hydration are essential for health, energy production, and recovery from exercise. The body needs a balance of macronutrients and micronutrients, as well as sufficient fluids, to perform at its best.

适当的营养和水分对健康、能量供应和运动恢复至关重要。身体需要平衡的宏量营养素和微量营养素，以及充足的液体，才能发挥最佳水平。

Carbohydrates are the body’s main source of energy. They are stored in the muscles and liver as glycogen. Complex carbohydrates such as pasta, rice, and bread provide sustained energy, while simple sugars provide quick but short-lived energy. Proteins are crucial for muscle repair and growth; good sources include meat, fish, eggs, and beans. Fats provide a concentrated source of energy and help with the absorption of fat-soluble vitamins.

碳水化合物是身体的主要能量来源。它们以糖原形式储存在肌肉和肝脏中。复合碳水化合物如意大利面、米饭和面包提供持续的能量，而单糖提供快速但短暂的能量。蛋白质对肌肉修复和增长至关重要；良好来源包括肉类、鱼类、鸡蛋和豆类。脂肪提供浓缩能量并帮助吸收脂溶性维生素。

Micronutrients include vitamins and minerals, which are needed in small amounts for various bodily functions. For example, calcium and vitamin D support bone health, while iron is essential for oxygen transport in the blood. A varied diet rich in fruits and vegetables generally ensures adequate micronutrient intake.

微量营养素包括维生素和矿物质，身体需要少量用来完成各种功能。例如，钙和维生素 D 支持骨骼健康，而铁对血液中的氧气运输至关重要。富含水果和蔬菜的多样化饮食通常能保证充足的微量营养素摄入。

Hydration is critical because water is involved in temperature regulation, nutrient transport, and joint lubrication. Dehydration occurs when the body loses more fluid than it takes in, leading to reduced performance, headaches, and fatigue. You should drink water before, during, and after exercise. The amount lost through sweat can be estimated by weight change: a loss of 1 kg equates roughly to 1 litre of fluid.

水分至关重要，因为水参与体温调节、营养运输和关节润滑。当身体流失的液体多于摄入时就会发生脱水，导致表现下降、头痛和疲劳。你应在运动前、中、后补充水分。通过体重变化可估算流失的汗量：体重下降1公斤大约相当于失水1升。

Energy balance refers to the relationship between energy intake (calories consumed) and energy expenditure (calories burned). If intake exceeds expenditure over time, weight gain occurs. If expenditure exceeds intake, weight loss occurs. Athletes must manage energy balance to support training demands and body composition goals.

能量平衡指能量摄入（消耗的卡路里）与能量消耗（燃烧的卡路里）之间的关系。如果长期摄入大于消耗，体重就会增加。如果消耗大于摄入，体重则会下降。运动员必须管理能量平衡，以支持训练需求和身体成分目标。

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10. Movement Analysis and Skill Acquisition | 动作分析与技能习得

Understanding movement analysis helps explain how the body creates motion and performs skills. The body can be viewed as a system of levers, and movements occur in specific planes and around axes. This knowledge is useful for improving technique and preventing injury.

理解动作分析有助于解释身体如何产生运动和完成技能。身体可被视为一个杠杆系统，运动在特定的平面和轴周围发生。这一知识对改进技术和预防损伤很有用。

A lever system consists of a lever (bone), a fulcrum or pivot (joint), an effort (muscle force), and a load (the weight to be moved). There are three classes of lever, but in sport, first-class levers (e.g., the neck when extending the head) and third-class levers (e.g., the elbow joint during a bicep curl) are most common. Third-class levers offer a large range of motion but require more effort.

杠杆系统包括杠杆（骨骼）、支点（关节）、动力（肌肉力量）和阻力（待移动的重量）。杠杆有三级，但在运动中，一级杠杆（例如抬头时的颈部）和三级杠杆（例如肱二头肌弯举时的肘关节）最为常见。三级杠杆提供较大的运动范围但需要更大力量。

Movements are described using three planes and their corresponding axes. The sagittal plane divides the body into left and right, and movements here occur around a frontal axis (e.g., forward somersault). The frontal plane divides front and back, and movements occur around a sagittal axis (e.g., cartwheel). The transverse plane divides top and bottom, and movements occur around a vertical axis (e.g., a full turn in the air).

动作用三个平面及其对应的轴来描述。矢状面将身体分为左右两部分，此平面的运动绕额状轴发生（例如前空翻）。额状面将身体分为前后两部分，运动绕矢状轴发生（例如侧手翻）。横断面将身体分为上下两部分，运动绕纵轴发生（例如空中转体一周）。

Skills can be classified on different continua to help coaches design appropriate practice. Open skills are performed in an unpredictable, changing environment where the performer must react (e.g., a pass in football). Closed skills are performed in a stable, predictable environment and are self-paced (e.g., a tennis serve in practice). Basic skills are simple and require little thought (e.g., running), while complex skills involve many decisions and precise timing (e.g., a gymnastics vault).

技能可以在不同连续体上分类，以帮助教练设计合适的训练。开放性技能在不可预测、多变的环境中进行，执行者必须做出反应（例如足球传球）。封闭性技能在稳定、可预测的环境中进行，由自己掌控节奏（例如训练中的网球发球）。基本技能简单且几乎不需要思考（例如跑步），而复杂技能涉及许多决策和精确的时机（例如体操跳马）。

Skill learning is supported by effective feedback. Intrinsic feedback comes from the performer’s own senses – how the movement felt. Extrinsic feedback comes from outside, such as a coach’s verbal comments or a video replay. Knowledge of results (KR) focuses on the outcome, while knowledge of performance (KP) provides information about the technique used. Positive feedback encourages and reinforces desired actions, while negative feedback highlights errors to be corrected.

技能学习需要有效反馈的支持。内在反馈来自执行者自身的感觉——动作感觉如何。外在反馈来自外部，例如教练的口头评论或视频回放。结果反馈（KR）关注结果，而表现反馈（KP）提供有关所用技术的信息。正面反馈鼓励并强化期望动作，负面反馈则指出需要纠正的错误。

Published by TutorHao | Physical Education Revision Series | aleveler.com

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