📚 Year 7 CIE Physical Education: Common Misconceptions and Corrections | Year 7 CIE 体育：常见误区与纠正方法
Many Year 7 students begin their Physical Education journey with ideas picked up from friends, social media, or casual sports. Some of these ideas, however, are not quite right and can hold back performance or even lead to injury. By identifying and correcting the most common misconceptions, you can build a safer and more effective foundation for all types of physical activity. This article walks through ten widespread myths in sport and exercise science, explains why they are misleading, and gives you practical ways to get it right from the start.
许多七年级学生在开启体育学习之旅时，脑海中常带着从朋友、社交媒体或日常运动中得来的各种想法。然而，其中一些观点并不正确，不仅会阻碍运动表现，甚至可能导致受伤。通过识别和纠正最常见的误区，你可以为各类身体活动打下更安全、更有效的基础。本文梳理了运动科学中十个普遍存在的迷思，解释它们为何具有误导性，并给出从一开始就做对的实际方法。
1. No Need to Warm Up Before Exercise | 运动前无需热身
Many young athletes believe that warming up is a waste of time, especially when they feel energetic and ready to play. They jump straight into a game or sprint without preparing their bodies. The truth is that a proper warm-up gradually raises heart rate, increases blood flow to muscles, and improves joint mobility. Skipping it sharply raises the risk of strains and sprains.
许多年轻运动员认为热身是浪费时间，尤其当感觉自己精力充沛、准备上场的时候。他们不经过任何准备就直接投入比赛或冲刺。事实是，正确的热身能逐步提升心率、增加流向肌肉的血流量，并改善关节活动度。跳过热身会显著增加肌肉拉伤和韧带扭伤的风险。
A correct warm-up should last at least 5–10 minutes and include light cardiovascular activity such as jogging or skipping, followed by dynamic movements like leg swings and arm circles. Avoid sitting still or doing intense bursts right away. Think of your muscles as elastic bands: they stretch much better when warm.
正确的热身应持续至少5至10分钟，包括慢跑或跳绳等轻度有氧运动，然后进行摆腿和绕臂等动态动作。避免一上来就静坐不动或进行剧烈爆发。可以把肌肉想象成橡皮筋：温暖时它们拉伸起来要好得多。
2. More Exercise Always Brings Better Results | 运动量越大效果越好
A common belief among enthusiastic beginners is that if three sessions a week feel good, six sessions must be twice as good. This 'more is better' mindset often leads to overtraining. Young bodies need time to recover between workouts; without rest, performance plateaus and the risk of overuse injuries like shin splints or tendonitis rises significantly.
热情高涨的初学者常抱有一种想法：如果每周练三次感觉不错，那么练六次效果一定好上一倍。这种“越多越好”的心态常常导致过度训练。年轻的身体在两次训练之间需要时间恢复；缺乏休息，运动表现会停滞不前，胫骨疲劳性骨膜炎或肌腱炎等过度使用损伤的风险也会显著上升。
Instead, aim for a balanced schedule that mixes activity days with rest or light active recovery. For Year 7 students, 3–4 purposeful PE or sport sessions per week, combined with plenty of sleep and good nutrition, usually produce the best development. Quality of movement always beats sheer quantity.
相反，应制定一个均衡的计划，将活动日与休息日或轻度主动恢复相结合。对七年级学生而言，每周3至4次有目的的体育课或运动训练，再加上充足睡眠和良好营养，通常能带来最佳发展。动作的质量永远胜过纯粹的数量。
3. Static Stretching Before Exercise Prevents Injury | 运动前做静态拉伸可预防受伤
You will often see people holding long, still stretches before a run or match. For years this was standard advice. Current evidence shows that holding a stretch for 30 seconds or more before activity actually reduces muscle power and does little to prevent injury. It can temporarily weaken the muscle, making it less ready for explosive actions like jumping or sprinting.
你常会看到人们在跑步或比赛前长时间保持静态拉伸。多年来这曾是标准建议。现有证据表明，活动前保持30秒以上的拉伸反而会降低肌肉爆发力，对预防受伤帮助甚微。它可能暂时削弱肌肉，使其对跳跃、冲刺等爆发性动作准备不足。
The better approach is to perform a dynamic warm-up: exercises that take joints through their full range of motion while gradually raising body temperature. Examples include walking lunges, high knees, and hip circles. Save static stretching for after exercise, when your muscles are warm and you are aiming to improve long-term flexibility.
更好的方法是进行动态热身：让关节在逐步升高体温的同时，完成全幅度的活动。示例包括箭步走、高抬腿和绕髋。把静态拉伸留到运动之后，那时肌肉已经温热，你正以改善长期柔韧性为目标。
4. You Only Need to Drink When You Feel Thirsty | 感到口渴时才需要喝水
Thirst is a late signal of dehydration. By the time you feel thirsty during a PE lesson or match, your body may already have lost 1–2 percent of its water, enough to reduce coordination, concentration, and endurance. Many students ignore drinking breaks altogether, thinking they can just grab a drink at the end.
口渴是脱水的滞后信号。当你在体育课或比赛中感到口渴时，身体可能已经流失了1%至2%的水分，这足以降低协调性、专注力和耐力。许多学生完全忽略饮水休息，以为可以等到最后再喝。
Make hydration a habit before, during, and after exercise. Aim for 300–500 ml of water about 30 minutes before starting, and take small sips every 15–20 minutes during activity. Water is usually sufficient for sessions under an hour; avoid sugary fizzy drinks, as they can cause stomach cramps.
养成运动前、运动中和运动后补水的习惯。开始前约30分钟饮用300至500毫升水，活动期间每隔15至20分钟小口啜饮。对不足一小时的训练来说，白开水通常就足够了；避免含糖汽水，它们可能引发胃痉挛。
5. Muscle Soreness Is Caused by Lactic Acid Build-Up | 肌肉酸痛是由乳酸堆积引起的
After a tough session, muscles often feel sore 24 to 48 hours later. For decades, people blamed lactic acid. Science now tells us that lactate (the correct chemical) is cleared from the muscles within an hour after exercise. The delayed soreness, known as DOMS, stems from microscopic tears in muscle fibres as part of the adaptation process.
一场高强度训练之后，肌肉常在24至48小时后感到酸痛。数十年来人们将此归咎于乳酸。如今科学告诉我们，乳酸（正确应为乳酸盐）在运动后一小时内便已从肌肉中清除。这种延迟性酸痛——称为DOMS——源于肌纤维在进行适应过程中的微小撕裂。
Mild DOMS is normal and signals that muscles are getting stronger. To manage it, keep moving gently (active recovery), stay hydrated, and ensure you eat protein-rich foods after exercise. Avoid the myth that you must be sore to have had a good workout; progress comes from gradual overload, not extreme pain.
轻微的DOMS是正常的，表明肌肉正在变得更强壮。要缓解它，可进行轻柔的活动（主动恢复），保持水分，并确保运动后摄入富含蛋白质的食物。不要相信“不痛就白练了”的迷思；进步来自循序渐进，而非极度痛苦。
6. Spot Reduction: Sit-Ups Will Burn Belly Fat | 局部减脂：仰卧起坐能燃烧腹部脂肪
Many students believe that doing hundreds of sit-ups will magically remove fat from their stomach while leaving the rest of the body unchanged. Unfortunately, the body does not work like a selective burner. When you exercise, fat is mobilised from stores all over the body, and where you lose it first is largely determined by genetics, not by the muscles you are working.
许多学生相信，做几百个仰卧起坐就能奇迹般地减掉腹部脂肪，而身体其他部位保持不变。遗憾的是，身体并非选择性燃烧器。运动时，脂肪从全身各处储存中动用，首先在哪里减掉主要取决于基因，而不是你所锻炼的肌肉。
To reduce body fat healthily, combine full-body aerobic activities (such as swimming, running, or cycling) with a balanced diet and strength exercises that involve large muscle groups. A strong core is excellent for posture and stability, but it will not carve out a six-pack without a lowered overall body fat percentage.
要健康地减少体脂，需将全身有氧活动（如游泳、跑步、骑自行车）与均衡饮食及大肌群力量训练结合起来。强壮的核心对体姿和稳定性极有帮助，但若不降低全身体脂百分比，是无法雕琢出六块腹肌的。
7. Cool-Down Is Not Necessary | 整理运动没有必要
When the session ends, it is tempting to stop moving and head straight for the changing room. Abruptly halting vigorous exercise can cause blood to pool in the legs, leading to dizziness or even fainting. A cool-down helps the cardiovascular system transition back to a resting state and begins the process of clearing metabolic waste.
训练一结束，人们很容易就想停下动作直奔更衣室。突然停止剧烈运动会导致血液淤积在腿部，引发头晕甚至昏厥。整理运动能帮助心血管系统平稳过渡回静息状态，并启动清除代谢废物的过程。
A good cool-down lasts 5–10 minutes and gradually decreases intensity. Start with a slow jog or walk, then move into static stretches for the major muscles you used. Focus on your breathing, aiming for calm, deep breaths. This routine also leaves you feeling mentally refreshed rather than worn out.
好的整理运动持续5至10分钟，并逐步降低强度。从慢跑或散步开始，然后对用过的主要肌群进行静态拉伸。专注于呼吸，力求平稳深长。这一流程还能让你在精神上感到焕然一新，而非疲惫不堪。
8. The Heavier the Weight, the Stronger You Become | 重量越重就越强壮
In the weight room, it can be tempting to load the bar with as many plates as possible to show strength. For Year 7 students whose bones and joints are still developing, lifting excessive weight is dangerous. Worse, heavy loads often cause poor technique, turning an exercise meant to strengthen muscles into a movement that strains joints and the lower back.
在力量房里，人们很容易为了展示力量而尽可能在杠铃上加满配重片。对于骨骼和关节仍在发育的七年级学生来说，举起过重的负荷是危险的。更糟的是，大重量常常导致技术变形，把原本用来强化肌肉的练习变成了对关节和下背的拉伤。
Start with bodyweight exercises or very light resistance that allows you to perform 12–15 repetitions with perfect form. Focus on controlled movements and full range of motion. Strength is built through progressive overload over weeks and months, not by lifting the heaviest thing you can just once.
从自重练习或非常轻的阻力开始，确保你能以完美姿势完成12至15次重复。专注于受控的动作和全幅度活动范围。力量是通过数周至数月的渐进超负荷建立起来的，而不是靠你只能勉强举起一次的最大重量。
9. If You Exercise Regularly, You Can Eat Anything | 经常运动就可以随便吃东西
PE lessons and sport sessions burn energy, but they cannot out-run a consistently poor diet. A single fizzy drink and a packet of crisps can easily cancel the calories burned in a 30-minute run. More importantly, food quality affects energy levels, concentration, and recovery, meaning that junk food directly undermines your performance on the field.
体育课和运动训练会消耗能量，但它们无法跑赢长期的不良饮食。一瓶汽水加一包薯片就能轻易抵消30分钟跑步所消耗的热量。更重要的是，食物质量会影响能量水平、注意力和恢复，这意味着垃圾食品会直接削弱你在场上的表现。
Aim for a balanced plate: roughly one-third fruits and vegetables, one-third starchy carbohydrates (wholegrain bread, rice, pasta), and one-third proteins (lean meat, fish, beans) plus a small amount of healthy fats. Treat sugary and fried foods as occasional extras, not daily fuel.
追求餐盘均衡：大约三分之一果蔬、三分之一淀粉类碳水化合物（全麦面包、米饭、意面）、三分之一蛋白质（瘦肉、鱼、豆类）以及少量健康脂肪。将含糖和油炸食品视为偶尔的额外享受，而非日常燃料。
10. Rest Days Are a Sign of Laziness | 休息日是懒惰的表现
Some young athletes feel guilty taking a day off, worried they are falling behind. In reality, rest days are when the body rebuilds stronger after training. Muscles repair microscopic damage, energy stores refill, and the nervous system recovers. Without planned rest, you slide into fatigue, irritability, and a higher risk of illness or injury.
一些年轻运动员在休息日会感到内疚，担心自己落后了。实际上，休息日正是身体在训练后变得更强壮的时刻。肌肉修复微小损伤，能量储备重新注满，神经系统得以恢复。没有计划的休息，你会陷入疲劳、易怒的状态，生病或受伤的风险也更高。
Schedule at least one or two full rest days per week. On these days you can still do light activities like walking, gentle swimming, or yoga – this is called active recovery. Listen to your body: if you are unusually sore, tired, or struggling to concentrate, an extra rest day often brings back better performance than pushing through.
每周至少安排一到两个完整的休息日。在这些日子里，你仍可进行散步、轻柔游泳或瑜伽等轻度活动——这被称作主动恢复。倾听身体的声音：如果你异常酸痛、疲惫或难以集中注意力，多休息一天往往比硬撑更能找回良好状态。
Published by TutorHao | Physical Education Revision Series | aleveler.com
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