Year 12 AQA PE: Core Knowledge Summary | AQA 体育学科：核心知识点梳理

📚 Year 12 AQA PE: Core Knowledge Summary | AQA 体育学科：核心知识点梳理

TutorHao presents a comprehensive AS-level revision guide extracting the essential knowledge across applied anatomy, skill acquisition, sport psychology, society, and technology. This resource clarifies the key specifications that Year 12 AQA Physical Education students must master to excel in examinations and deepen their understanding of sport science.

TutorHao 为您梳理 Year 12 AQA 体育学科 AS 阶段核心考点，涵盖应用解剖、技能习得、运动心理学、体育社会学与科技模块。这份精炼指南旨在助力考生牢固掌握关键知识，从容应对考试并深化对体育科学的理解。

1. Cardiovascular System | 心血管系统

The heart’s conduction system (SA node → AV node → Bundle of His → Purkinje fibres) ensures coordinated, rhythmic contractions. Cardiac output (Q) = Stroke volume (SV) × Heart rate (HR). During exercise, SV rises due to enhanced venous return and the Starling mechanism; HR increases linearly with intensity until near maximum.

心脏传导系统（窦房结 → 房室结 → 希氏束 → 浦肯野纤维）保证协调的节律性收缩。心输出量 (Q) = 每搏输出量 (SV) × 心率 (HR)。运动时，静脉回流量增加及斯塔林机制使 SV 增大；HR 随强度上升直至接近最大值。

Cardiovascular drift occurs in prolonged steady-state exercise: SV gradually falls while HR rises to maintain Q, primarily because of dehydration and increased core temperature. The vascular shunt mechanism redistributes blood via vasodilation in active muscles and vasoconstriction in organs, aided by the action of local metabolites and the sympathetic nervous system.

长时间恒定负荷运动中出现心血管漂移：SV 逐步下降，HR 代偿性升高以维持 Q，主要原因是脱水与核心温度升高。血管分流机制通过活跃肌肉处血管舒张和内脏血管收缩实现血流重分配，受局部代谢产物和交感神经系统调节。

Venous return is enhanced by the skeletal muscle pump, respiratory pump, and venoconstriction. Starlings law states that a greater end-diastolic volume produces a more forceful contraction, increasing SV.

骨骼肌泵、呼吸泵和静脉收缩共同促进静脉回流。斯塔林定律指出，舒张末期容积越大，心肌收缩越有力，SV 越高。

2. Respiratory System | 呼吸系统

At rest, inspiration is active (diaphragm and external intercostals), expiration passive. During exercise, accessory muscles (sternocleidomastoid, scalenes) assist inspiration, and internal intercostals plus abdominals force expiration. Tidal volume (TV) and respiratory rate (RR) both rise, causing minute ventilation (VE = TV × RR) to increase dramatically.

静息时，吸气为主动过程（膈肌与肋间外肌），呼气为被动。运动时，辅助肌（胸锁乳突肌、斜角肌）协助吸气，肋间内肌和腹肌驱动用力呼气。潮气量 (TV) 与呼吸频率 (RR) 均上升，每分通气量 (VE = TV × RR) 大幅增加。

Gas exchange relies on partial pressure gradients: O₂ diffuses from alveoli into blood, CO₂ from blood into alveoli. The oxyhaemoglobin dissociation curve shifts right (Bohr shift) when temperature, CO₂, and acidity increase, facilitating O₂ unloading to working muscles. Myoglobin acts as an intracellular O₂ store and aids diffusion.

气体交换依赖分压梯度：O₂ 由肺泡向血液扩散，CO₂ 由血液向肺泡扩散。温度、CO₂ 和酸度升高时，氧合血红蛋白解离曲线右移（波尔效应），促进 O₂ 向运动肌肉释放。肌红蛋白作为胞内储氧体并协助扩散。

• Key lung volumes: Tidal volume (TV) increases during exercise; vital capacity (VC) remains relatively constant; residual volume (RV) prevents lung collapse.
• 关键肺容积：运动时潮气量 (TV) 增加；肺活量 (VC) 相对稳定；残气量 (RV) 防止肺泡塌陷。
• Ventilatory response: Initially rapid rise due to neural input, then plateau at steady state; anaerobic threshold prompts additional ventilatory increase to expel CO₂.
• 通气反应：初期因神经驱动快速上升，稳定状态下趋于平台；达到无氧阈时通气进一步增加以排出 CO₂。

3. Neuromuscular System | 神经肌肉系统

A motor unit consists of a single motor neuron and all the muscle fibres it innervates. All-or-none law applies: once stimulated, all fibres in the unit contract. Recruitment follows the size principle—small, slow-twitch units are activated first, then larger fast-twitch units for higher force production.

运动单位由一个运动神经元及其支配的所有肌纤维组成，遵从“全或无”原则。募集遵循大小原则：先激活小型的慢肌运动单位，再动用较大的快肌单位以产生更大力量。

At the neuromuscular junction, acetylcholine is released, binds to receptors on the sarcolemma, depolarises the membrane, and triggers an action potential. This leads to calcium release from the sarcoplasmic reticulum, initiating the sliding filament theory (cross-bridge cycling between actin and myosin).

神经肌肉接头处释放乙酰胆碱，与肌膜受体结合引发去极化，产生动作电位。钙离子从肌质网释放，激活肌丝滑行理论（肌动蛋白与肌球蛋白的横桥循环）。

Proprioceptors: muscle spindles detect stretch and initiate the stretch reflex to maintain muscle tone; Golgi tendon organs sense tension and can trigger autogenic inhibition to protect against excessive force.

本体感受器：肌梭感知牵拉，引发牵张反射以维持肌张力；高尔基腱器官感受张力，可激活自主抑制，防止肌肉受力过度。

4. Musculo-skeletal System and Movement Analysis | 肌肉骨骼系统与运动分析

The skeleton provides support, protection, mineral storage, blood cell production, and points for muscle attachment. Synovial joints (hinge, ball-and-socket, pivot, etc.) allow movement and are stabilised by ligaments, tendons, and cartilage. Movement occurs in three planes: sagittal (flexion/extension), frontal (abduction/adduction), and transverse (rotation).

骨骼具有支撑、保护、矿物质储存、造血以及为肌肉提供附着点等功能。滑液关节（铰链、球窝、枢轴等）允许运动，并由韧带、肌腱和软骨稳定。运动在三个平面内发生：矢状面（屈/伸）、额状面（外展/内收）和水平面（旋转）。

Muscle contraction types: isotonic concentric (muscle shortens), isotonic eccentric (muscle lengthens under tension), and isometric (length unchanged). Lever systems in the body include first, second, and third class; most movements are third-class levers (e.g., biceps curl) designed for speed and range rather than force advantage.

肌肉收缩类型：等张向心（肌肉缩短）、等张离心（肌肉在张力下被拉长）和等长（长度不变）。人体杠杆包括第一、二、三类；绝大多数运动属第三类杠杆（如肱二头肌弯举），重在速度与幅度而非省力。

Analysis example: a football kick involves hip flexion, knee extension, and plantarflexion; prime movers include iliopsoas, quadriceps, and gastrocnemius respectively. Planes: sagittal for the kick. Antagonistic pairs ensure controlled motion.

动作分析示例：足球踢

Published by TutorHao | Year 12 体育 Revision Series | aleveler.com

更多咨询请联系16621398022（同微信）