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B1 noun 9 min read

筋肉痛

Practice it Examples Notes & Tips 筋肉痛 in 30 Seconds

Explanation 筋肉痛 in your Level:

At the A1 level, you should learn 筋肉痛 (kinnikutsuu) as a simple noun meaning 'muscle pain.' You don't need to know the complex biological reasons behind it yet. Just remember that it is what you feel after you run or play sports. You can use it in very simple sentences like 'Kinnikutsuu desu' (I have muscle pain) or 'Ashi ga kinnikutsuu' (My legs are sore). It is a useful word to know because it helps you explain why you might be walking slowly or why you cannot do a certain activity. You will often see the kanji for 'meat' (肉) and 'pain' (痛) in this word, which can help you remember its meaning. Even at this early stage, try to remember that it is a noun, not an adjective. You shouldn't say 'kinnikutsuu-i.' Instead, just use 'desu' or 'da.' If you go to a park and play with friends, and the next day your arms hurt, you can say 'Ude ga kinnikutsuu!' This is a great way to start using the word in a real-life context.

At the A2 level, you can start using 筋肉痛 with more variety in your verbs and particles. You should learn the common phrase 'kinnikutsuu ni naru,' which means 'to get muscle pain.' For example, 'Kinou hashitta kara, kyou wa kinnikutsuu ni narimashita' (Because I ran yesterday, I got muscle pain today). You can also start using simple reason-giving structures like '~node' or '~kara' to explain why you have the pain. At this level, you might also encounter the word in simple health advice, such as 'Kinnikutsuu no toki wa yasumimasu' (When you have muscle pain, you rest). You should be able to distinguish between 筋肉痛 and other types of pain like 'onaka ga itai' (stomach ache) or 'atama ga itai' (headache). Remember that 筋肉痛 is specifically for the muscles. You can also start using 'chotto' (a little) or 'sugoku' (very) to describe the intensity of the pain. This will help you communicate your physical state more clearly to your Japanese-speaking friends or teachers.

At the B1 level, you are expected to use 筋肉痛 in more complex sentence structures and understand its cultural nuances. You should be familiar with the 'delayed onset' aspect of muscle pain in Japanese culture, including the joke about pain coming later as you get older. You can use the word to describe specific scenarios, such as 'Undou-busoku de sugu kinnikutsuu ni naru' (I get muscle pain easily because of a lack of exercise). You should also be able to use the word in the passive or causative forms if necessary, though the active 'naru' remains most common. At this stage, you can also start using more specific body parts as subjects, like 'fukura-hagi' (calves) or 'fukkuin' (abs). You might also hear this word in more detailed conversations about fitness routines or health habits. You should be able to read the kanji 筋肉痛 without furigana in most contexts. This level is where you transition from just stating the pain to discussing its causes and remedies in a more natural way.

At the B2 level, you should be able to use 筋肉痛 in professional or semi-formal contexts, such as at a gym where you are discussing training protocols with a personal trainer. You should understand the difference between 筋肉痛 and related medical terms like 'nikubanare' (muscle strain) or 'kinniku-hirou' (muscle fatigue). You can use more advanced grammar to describe the pain, such as 'Kinnikutsuu ga hageshikute, kaidan o oriru no ga kutsutsu da' (The muscle pain is so intense that going down stairs is a struggle). You should also be comfortable using the word in writing, such as in a blog post about a marathon experience or a health report. At this level, you can also understand and use the term 'chihatsusei kinnikutsuu' (DOMS) when you want to sound more technical. You should be aware of the different levels of formality when discussing physical ailments and be able to adjust your language accordingly. For instance, using 'itami' in a very formal medical report versus 筋肉痛 in a casual conversation.

At the C1 level, your understanding of 筋肉痛 should be near-native. You should be able to discuss the physiological mechanisms of muscle pain in Japanese, such as the role of lactic acid (once a common theory) or microscopic tears in muscle fibers. You can use the word in idiomatic or metaphorical ways, and you should be able to follow fast-paced conversations or media reports that use the term. You should also be aware of the nuances between different regional dialects or slang terms that might be used to describe physical pain. At this level, you can accurately describe the progression of the pain over several days using precise time-related vocabulary. You can also participate in discussions about sports science or physical therapy where 筋肉痛 is a central topic. Your ability to distinguish between 'kinnikutsuu' and similar-sounding words or related concepts should be flawless. You can also use the word to add flavor to your storytelling, describing the physical toll of a journey or a difficult task with evocative language.

At the C2 level, you possess a comprehensive mastery of 筋肉痛 and its place within the broader landscape of the Japanese language. You can use the term in high-level academic or medical discussions, analyzing the latest research on muscle recovery and the efficacy of various treatments. You understand the historical evolution of the term and how it has been used in Japanese literature or media over the decades. Your use of the word is perfectly integrated into your speech, with correct pitch accent and natural flow. You can also recognize and use subtle wordplay or puns involving the kanji for 筋肉痛. Furthermore, you can explain the cultural significance of exercise and physical endurance in Japanese society, using 筋肉痛 as a point of reference. At this level, the word is not just a vocabulary item but a tool for nuanced expression, allowing you to convey complex physical and emotional states with ease and precision.

Practice it Examples Notes & Tips

筋肉痛 in 30 Seconds

Kinnikutsuu refers specifically to muscle soreness after exercise, not general pain.
It is a compound noun: 筋 (muscle) + 肉 (flesh) + 痛 (pain).
Commonly used with verbs like 'naru' (to get) and 'arimasu' (to have).
There is a cultural joke that late-onset pain indicates aging in Japan.

The Japanese word 筋肉痛 (pronounced kinnikutsuu) is a compound noun that translates directly to muscle pain or muscle soreness. It is most frequently used to describe the specific type of soreness that occurs after physical exertion, known in English as Delayed Onset Muscle Soreness (DOMS). While English speakers might simply say 'I'm sore,' Japanese speakers almost always specify that it is their muscles that are hurting by using this specific term. It is a very common word in daily life, especially among athletes, gym-goers, or even office workers who have recently helped a friend move house. The word is composed of three kanji characters: 筋 (muscle/fiber), 肉 (flesh/meat), and 痛 (pain). Together, they form a clear and descriptive medical and casual term.

Etymology: The term combines 'kinniku' (muscle) with 'tsuu' (pain). It follows the standard pattern for naming bodily aches in Japanese.

ジムで運動した翌日は、いつもひどい筋肉痛になります。 (The day after working out at the gym, I always get terrible muscle soreness.)

Understanding when to use this word involves recognizing the difference between acute injury and general soreness. If you pull a muscle, you might use the word 'kega' (injury) or 'tsuru' (cramp), but for that dull ache that follows a hike or a heavy lifting session, 筋肉痛 is the perfect fit.

階段を上るだけで筋肉痛が痛みます。 (Just climbing the stairs makes my muscle soreness hurt.)

It is also important to note that the word is used both as a subject and an object. You can say 'I have muscle pain' or 'The muscle pain is bad.'

Grammar Note: Commonly paired with the verb 'naru' (to become) or 'ga aru' (to have).

久しぶりに走ったら、足が筋肉痛になった。 (After running for the first time in a while, my legs got sore.)

全身が筋肉痛で動けません。 (My whole body is so sore I can't move.)

Synonym: While 'itami' is general pain, 'kinnikutsuu' is specific to muscles.

腹筋が筋肉痛で、笑うと痛い。 (My abs are sore, so it hurts when I laugh.)

In conclusion, 筋肉痛 is an essential word for anyone living an active life in Japan or discussing physical health. It bridges the gap between medical terminology and everyday casual conversation, making it a versatile addition to your vocabulary. Whether you are at a clinic or just chatting with friends after a weekend trip to the mountains, you will find this word indispensable for expressing physical discomfort caused by exercise.

Using 筋肉痛 correctly involves understanding its role as a noun and its relationship with specific verbs. The most common way to express that you are experiencing muscle pain is by saying 'kinnikutsuu ni naru' (to become muscle-pained) or 'kinnikutsuu ga hidoi' (muscle pain is bad). Unlike English, where 'sore' is an adjective, Japanese uses the noun form to describe the state. For example, 'I am sore' is typically translated as 'Kinnikutsuu desu' or 'Kinnikutsuu ni narimashita.'

Verb Pairing: ~になる (to get/become), ~がある (to have), ~を和らげる (to ease/soothe).

スクワットのせいで、太ももがひどい筋肉痛だ。 (Thanks to squats, my thighs are terribly sore.)

Another common construction is specifying the body part followed by the particle 'ga' and then 筋肉痛. For instance, 'ude ga kinnikutsuu' (arms are sore). You can also use it to explain why you are moving slowly or avoiding certain activities. In a professional setting, if you are a physical therapist or a coach, you might use more formal verbs like 'shoujiru' (to occur) to describe the onset of the pain.

昨日の引越しの手伝いで、背中が筋肉痛になりました。 (Because of helping with the move yesterday, my back is sore.)

When talking about recovery, you would use 'naoru' (to heal/get better). 'Kinnikutsuu ga naoru made ni mikka kakatta' (It took three days for the muscle pain to go away). This word is also used in compound forms, such as 'chihatsusei kinnikutsuu' (Delayed Onset Muscle Soreness), though the shorter version is much more common in daily life.

Intensity Modifiers: Chotto (a little), kanari (considerably), mouchou (extremely).

水泳をしたので、肩が少し筋肉痛です。 (I swam, so my shoulders are a bit sore.)

彼は筋肉痛を我慢して練習を続けた。 (He endured the muscle pain and continued practicing.)

Timeframes: Yokujitsu (next day), asatte (day after tomorrow).

明後日あたりに筋肉痛が来そうです。 (It looks like the muscle pain will hit around the day after tomorrow.)

In summary, mastering the sentence patterns for 筋肉痛 allows you to describe your physical state with precision. Whether you are complaining to a friend or explaining a condition to a doctor, these patterns are universal and highly effective.

You will hear 筋肉痛 in a variety of settings, ranging from the very casual to the semi-formal. One of the most common places is the gym or a sports club. Trainers will often ask their clients, 'Kinnikutsuu wa arimasu ka?' (Do you have any muscle pain?) to gauge the intensity of previous workouts. It is also a staple of conversation in Japanese offices on Monday mornings, particularly after a weekend where people might have gone hiking, played golf, or participated in a local 'undokai' (sports day).

Setting: The Gym: Used to discuss recovery and workout effectiveness.

「昨日のトレーニング、どうだった？」「腕がものすごい筋肉痛だよ。」 ('How was yesterday's training?' 'My arms are incredibly sore.')

You will also find this word in television programs, especially those focused on health, fitness, or variety shows where celebrities are challenged to perform physical tasks. In these contexts, the word is often used for comedic effect, highlighting how out of shape a person might be. It is also frequently seen in advertisements for topical pain relief products like patches (shippu) or creams.

この湿布は筋肉痛によく効きます。 (This medicated patch works well for muscle pain.)

Schools are another place where 筋肉痛 is heard often, especially after physical education (PE) festivals or marathon season. Students will complain to each other about their legs hurting. Additionally, the word appears in medical contexts, such as at an orthopedic clinic (seikeigeka) or a massage parlor (seitaiin).

Setting: Medical/Wellness: Used to differentiate between chronic pain and temporary exercise-induced pain.

マッサージで筋肉痛をほぐしてもらった。 (I had my muscle soreness loosened up with a massage.)

久しぶりのゴルフで、明日はきっと筋肉痛だ。 (After playing golf for the first time in ages, I'll definitely have muscle pain tomorrow.)

Setting: Home Life: Used when doing heavy chores or gardening.

大掃除をしたら、全身筋肉痛になっちゃった。 (I did some major spring cleaning and ended up with muscle pain all over.)

Whether you are watching a drama where a character struggles to walk after a marathon or reading a health blog about the benefits of protein, 筋肉痛 is a word that constantly surfaces in Japanese society. Its ubiquity makes it a key term for understanding the daily physical experiences of Japanese people.

One of the most frequent mistakes English speakers make when using 筋肉痛 is trying to use it as an adjective. In English, we say 'I am sore,' but in Japanese, you cannot simply say 'Watashi wa kinnikutsuu desu' in the same way you would say 'Watashi wa ureshii desu' (I am happy). You must treat it as a noun. Another mistake is confusing 筋肉痛 with general 'itami' (pain) or 'kega' (injury). While all muscle pain is a type of pain, not all pain is muscle pain. If you have a sharp pain from a cut or a broken bone, 筋肉痛 is incorrect.

Mistake: Adjectival Usage: Incorrect: 筋肉痛い (Kinniku-itai). Correct: 筋肉痛だ (Kinnikutsuu da).

❌ 足が筋肉痛い。 (My legs are muscle-painy.)
✅ 足が筋肉痛です。 (My legs have muscle pain.)

Another nuance is the timing. 筋肉痛 specifically refers to the soreness that comes *after* exercise. If you feel a sudden, sharp pain *during* exercise, that is more likely a 'nikubanare' (muscle strain/tear) or a 'tsuru' (cramp). Using 筋肉痛 for a sudden injury might confuse people about the severity of your condition.

❌ 膝の骨が筋肉痛です。 (The bone in my knee has muscle pain.)
✅ 膝の周りの筋肉が筋肉痛です。 (The muscles around my knee are sore.)

Learners also sometimes forget the 'tsuu' at the end and just say 'kinniku' (muscle). This changes the meaning from 'muscle pain' to just 'muscle.' For example, 'Kinniku ga arimasu' means 'I have muscles' (I am muscular), whereas 'Kinnikutsuu ga arimasu' means 'I have muscle pain.'

Mistake: Omission: Leaving out 'tsuu' changes the meaning entirely.

❌ 運動の後、筋肉がある。 (After exercise, I have muscles.)
✅ 運動の後、筋肉痛がある。 (After exercise, I have muscle pain.)

❌ 筋肉つ (Kinniku-tsu)
✅ 筋肉痛 (Kinnikutsuu)

Finally, be careful with the particle 'ni.' While 'kinnikutsuu ni naru' is correct, 'kinnikutsuu ni suru' would mean 'to make (someone) have muscle pain,' which is a very strange thing to say unless you are a particularly sadistic gym trainer! Stick to 'naru' for your own experiences.

While 筋肉痛 is the most common term for muscle soreness, there are several related words that describe different types of physical discomfort. Understanding these can help you be more precise in your Japanese. For example, 'kori' (stiffness) is often used for the shoulders or neck, whereas 'kinnikutsuu' is used for the ache after exercise. You wouldn't usually say you have 'kinnikutsuu' in your shoulders from sitting at a desk; you would say 'kata-kori' (stiff shoulders).

Comparison: Kori vs. Kinnikutsuu: Kori is stiffness from tension/posture. Kinnikutsuu is pain from exertion.

デスクワークで肩が凝る (Shoulders get stiff from desk work) vs. 筋トレで肩が筋肉痛になる (Shoulders get muscle pain from weight training).

Another word is 'darusa' (sluggishness/fatigue). If your muscles don't necessarily hurt but they feel heavy and tired, 'kinniku ga darui' might be more appropriate. Then there is 'tsuru' (to cramp). A cramp is a sudden, intense contraction, whereas 筋肉痛 is a lingering ache.

足がつった！ (My leg cramped!) vs. 足が筋肉痛だ。 (My leg is sore.)

In more formal or medical contexts, you might hear 'kinniku-tsuu' referred to as 'kin-tsuu.' However, this is quite rare in daily speech. There is also the term 'nikubanare,' which means a pulled muscle or a muscle tear. This is much more serious than 筋肉痛 and requires medical attention.

Comparison: Nikubanare vs. Kinnikutsuu: Nikubanare is an injury (tear). Kinnikutsuu is natural recovery pain.

肉離れは歩けないほど痛い。 (A muscle tear hurts so much you can't walk.)

激しい運動の後に来るのは、遅発性筋肉痛です。 (What comes after intense exercise is delayed onset muscle soreness.)

Related Term: 関節痛 (Kansetsutsuu): Joint pain, often confused by beginners with muscle pain.

風邪をひいて関節痛がする。 (I have a cold and my joints ache.)

By knowing these alternatives, you can avoid the common pitfall of using 筋肉痛 as a catch-all for any body ache. Each term has its specific place in the Japanese language, and using them correctly will make your Japanese sound much more natural and precise.

How Formal Is It?

Fun Fact

The kanji for 'muscle' (筋) contains the 'bamboo' radical at the top, which historically might relate to the fibrous nature of both bamboo and muscle tissue.

Pronunciation Guide

UK /kin.ni.ku.tsɯː/

US /kin.ni.ku.tsuː/

Japanese is a pitch-accent language. In 'kinnikutsuu', the pitch typically stays relatively flat or rises slightly on 'niku' depending on the dialect.

Rhymes With

Futsuu (Normal) Kutsuu (Pain/Agony) Zentsuu (Opening to traffic) Kotsu (Bone/Knack) Niku (Meat) Kinniku (Muscle) Tsuu (Expert) Zutsuu (Headache)

Common Errors

Shortening the final 'uu' to a short 'u'.
Pronouncing 'kin' as 'kin' (like family) instead of a double 'n' sound.
Mispronouncing 'tsu' as 'su' or 'chu'.
Putting the stress on the wrong syllable.
Mixing up the kanji readings.

Difficulty Rating

Reading 3/5

Kanji are common but require B1 level knowledge.

Writing 4/5

The kanji for 'tsuu' (痛) can be tricky to write correctly.

Speaking 2/5

Pronunciation is straightforward once you master 'tsuu'.

Listening 2/5

Easy to recognize in context.

What to Learn Next

Prerequisites

筋肉 (Muscle) 痛い (Painful) 運動 (Exercise) 体 (Body) なる (To become)

Learn Next

関節 (Joint) 疲労 (Fatigue) 湿布 (Medicated patch) 回復 (Recovery) 柔軟 (Flexibility)

Advanced

乳酸 (Lactic acid) 炎症 (Inflammation) 筋断裂 (Muscle rupture) 整体 (Chiropractic/Bodywork) 腱鞘炎 (Tendonitis)

Grammar to Know

Noun + になる

筋肉痛になる (To get muscle pain)

Particle 'de' for cause

運動で筋肉痛になる (Get muscle pain from exercise)

Particle 'ga' for subject

筋肉痛がひどい (Muscle pain is bad)

Te-form for reason

筋肉痛がひどくて歩けない (Can't walk because muscle pain is bad)

Noun + のせいで

筋肉痛のせいで遅れた (Delayed because of muscle pain)

Examples by Level

筋肉痛です。

I have muscle pain.

Direct noun usage with 'desu'.

足が筋肉痛です。

My legs have muscle pain.

Subject (body part) + ga + kinnikutsuu.

筋肉痛が痛い。

The muscle pain hurts.

Kinnikutsuu acts as the subject.

昨日は筋肉痛でした。

Yesterday, I had muscle pain.

Past tense of 'desu'.

運動して、筋肉痛です。

I exercised, and now I have muscle pain.

Te-form of a verb to show cause.

腕が筋肉痛じゃないです。

My arms don't have muscle pain.

Negative form of 'desu'.

筋肉痛、ありますか？

Do you have muscle pain?

Question form with 'arimasu'.

ひどい筋肉痛です。

It's terrible muscle pain.

Adjective 'hidoi' modifying the noun.

明日は筋肉痛になるでしょう。

I will probably get muscle pain tomorrow.

Using 'naru' (to become) with 'deshou' (probably).

筋肉痛で歩けません。

I can't walk because of muscle pain.

Particle 'de' indicating cause/reason.

久しぶりに泳いだら、筋肉痛になった。

I swam for the first time in a while and got muscle pain.

Conditional 'tara' followed by the result.

筋肉痛の薬を買いました。

I bought medicine for muscle pain.

Noun + no + noun.

背中が少し筋肉痛です。

My back is a little sore.

Adverb 'sukoshi' modifying the state.

筋肉痛が治りました。

The muscle pain is gone (healed).

Verb 'naoru' (to heal).

山登りの後、筋肉痛になりましたか？

Did you get muscle pain after mountain climbing?

Past tense question with 'naru'.

筋肉痛にならないようにストレッチします。

I stretch so I don't get muscle pain.

Negative verb + 'you ni' (in order to).

筋肉痛が二日後に来ると、年を感じます。

When muscle pain comes two days later, I feel my age.

Conditional 'to' used for general truths/observations.

激しい運動をしたので、全身が筋肉痛です。

I did intense exercise, so my whole body is sore.

Reason 'node' connecting two clauses.

筋肉痛を和らげるために、お風呂に入ります。

I'll take a bath to ease the muscle pain.

Verb + 'tame ni' (for the purpose of).

筋肉痛があるときは、無理をしないでください。

Please don't overdo it when you have muscle pain.

Noun + 'ga aru toki' (when there is...).

昨日の引っ越しのせいで、腕がひどい筋肉痛だ。

Because of moving yesterday, my arms are terribly sore.

'no sei de' indicating a negative cause.

筋肉痛がひどくて、階段を上るのが大変です。

The muscle pain is so bad that climbing stairs is hard.

Te-form used as a reason.

彼は筋肉痛を理由に、練習を休みました。

He skipped practice using muscle pain as an excuse.

Noun + 'o riyuu ni' (with ... as the reason).

筋肉痛が来るのが遅いのは、運動不足の証拠だ。

Muscle pain coming late is proof of a lack of exercise.

Nominalized clause 'no wa'.

このサプリメントは筋肉痛の回復を早めます。

This supplement speeds up recovery from muscle pain.

Direct object with 'o hayameru'.

筋肉痛を恐れずに、新しいトレーニングに挑戦しよう。

Let's challenge ourselves with new training without fearing muscle pain.

Negative te-form 'osorezu ni' (without fearing).

筋肉痛のメカニズムについては、諸説あります。

There are various theories regarding the mechanism of muscle pain.

Noun + 'ni tsuite wa' (regarding...).

筋肉痛があっても、軽い運動なら大丈夫です。

Even if you have muscle pain, light exercise is okay.

Concessive 'te mo' (even if).

筋肉痛の程度によって、メニューを調整しましょう。

Let's adjust the menu depending on the degree of muscle pain.

Noun + 'ni yotte' (depending on).

筋肉痛は、筋肉が成長している証拠とも言えます。

Muscle pain can also be said to be proof that muscles are growing.

Quotative 'to mo ieru'.

筋肉痛を放置すると、怪我につながる恐れがあります。

If you ignore muscle pain, there's a risk it could lead to injury.

Conditional 'to' followed by 'osore ga aru'.

筋肉痛が出始めたのは、運動から24時間後だった。

It was 24 hours after exercise that the muscle pain started to appear.

Verb stem + 'hajimeru' (start to...).

遅発性筋肉痛は、筋線維の微細な損傷が原因とされる。

Delayed onset muscle soreness is said to be caused by microscopic damage to muscle fibers.

Passive form 'to sareru' (is considered/said to be).

筋肉痛に伴う炎症を抑えるために、アイシングを行う。

Icing is performed to suppress the inflammation accompanying muscle pain.

Noun + 'ni tomonau' (accompanying...).

筋肉痛の不快感を軽減する効果的なストレッチ法を学ぶ。

Learn effective stretching methods to reduce the discomfort of muscle pain.

Complex noun modification.

過度なトレーニングは、単なる筋肉痛以上の損傷を招く。

Excessive training leads to damage beyond mere muscle pain.

Noun + 'ijou no' (more than...).

筋肉痛のピークは通常、運動後24時間から48時間である。

The peak of muscle pain is usually 24 to 48 hours after exercise.

Standard 'A wa B de aru' structure.

筋肉痛の有無にかかわらず、毎日のウォーキングは欠かさない。

Regardless of whether there is muscle pain, I never miss my daily walk.

Noun + 'no umu ni kakawarazu' (regardless of existence).

筋肉痛を「心地よい痛み」と感じるアスリートも少なくない。

Not a few athletes feel muscle pain as a 'pleasant pain.'

Double negative 'sukunaku nai' (not a few).

筋肉痛の症状が長引く場合は、医師の診断を仰ぐべきだ。

If muscle pain symptoms persist, you should seek a doctor's diagnosis.

Verb + 'beki da' (should/ought to).

筋肉痛の発生機序に関しては、未だ解明されていない点も多い。

Regarding the mechanism of muscle pain occurrence, there are still many points that have not been clarified.

Formal 'ni kanshite wa' and negative passive 'sarete inai'.

筋肉痛を呈している部位に対して、適切な物理療法を施す。

Apply appropriate physical therapy to the area exhibiting muscle pain.

Formal verb 'tei suru' (to exhibit/present).

筋肉痛がパフォーマンスに及ぼす影響を最小限に留める。

Keep the impact of muscle pain on performance to a minimum.

Verb 'oyobosu' (to exert/cause).

筋線維の修復過程において、筋肉痛は不可避な生理現象である。

In the process of muscle fiber repair, muscle pain is an unavoidable physiological phenomenon.

Noun + 'ni oite' (in the process/context of).

筋肉痛の緩和を目的としたマッサージの有効性を検証する。

Verify the effectiveness of massage aimed at alleviating muscle pain.

Noun + 'o mokuteki to shita' (aimed at...).

筋肉痛に起因する可動域の制限が、フォームの乱れを招く。

Restricted range of motion resulting from muscle pain leads to poor form.

Noun + 'ni kiin suru' (caused by/resulting from).

筋肉痛の激しさは、運動の強度や持続時間に相関する。

The intensity of muscle pain correlates with the intensity and duration of exercise.

Verb 'soukan suru' (to correlate).

筋肉痛を単なる疲労と片付けず、身体のシグナルとして捉える。

Do not dismiss muscle pain as mere fatigue, but perceive it as a signal from the body.

Negative 'zu' form and 'to shite toraeru'.

Common Collocations

筋肉痛になる

筋肉痛がひどい

筋肉痛を和らげる

筋肉痛が治る

ひどい筋肉痛

全身筋肉痛

筋肉痛が来る

筋肉痛の薬

筋肉痛を我慢する

軽い筋肉痛

Common Phrases

筋肉痛が明日来る

— The muscle pain will come tomorrow. Used to predict post-workout soreness.

今日は頑張ったから、筋肉痛が明日来るぞ。

筋肉痛が遅れて来る

— The muscle pain is coming late. Often used as a joke about getting older.

筋肉痛が遅れて来るのは、年のせいかな。

笑うと筋肉痛が響く

— It hurts my sore muscles when I laugh. Usually refers to abdominal soreness.

腹筋が筋肉痛で、笑うと響くんだ。

筋肉痛でバキバキだ

— My body is 'creaky' or stiff from muscle pain. 'Bakibaki' is an onomatopoeia.

全身、筋肉痛でバキバキだよ。

心地よい筋肉痛

— A pleasant muscle pain. Refers to the satisfying feeling after a good workout.

この心地よい筋肉痛がたまらない。

筋肉痛をほぐす

— To loosen up muscle pain. Usually via massage or light movement.

お風呂で筋肉痛をほぐそう。

筋肉痛が取れない

— The muscle pain won't go away. Used for lingering soreness.

なかなか筋肉痛が取れない。

筋肉痛のピーク

— The peak of the muscle pain. The time when it hurts the most.

今が筋肉痛のピークだ。

筋肉痛になりやすい

— Prone to getting muscle pain. Used for people who aren't fit.

最近、筋肉痛になりやすいんだ。

筋肉痛を予防する

— To prevent muscle pain. Using stretching or nutrition.

筋肉痛を予防するためにアミノ酸を飲む。

Often Confused With

筋肉痛 vs 肉離れ (Nikubanare)

A muscle tear. It is a serious injury, whereas kinnikutsuu is normal soreness.

筋肉痛 vs 足がつる (Ashi ga tsuru)

A leg cramp. It is a sudden, sharp contraction, not a lingering ache.

筋肉痛 vs 関節痛 (Kansetsutsuu)

Joint pain. It affects the joints (knees, elbows), not the muscle tissue itself.

Idioms & Expressions

"筋肉痛が二日後に来る"

— A common saying suggesting that as one ages, the onset of muscle pain is delayed.

二日後に筋肉痛が来るなんて、年をとった証拠だね。

Informal/Humorous

"筋肉痛は成長の証"

— Muscle pain is proof of growth. A motivational phrase in fitness circles.

筋肉痛は成長の証だから、喜ぶべきだよ。

Motivational

"筋肉痛に鞭打つ"

— To 'whip' one's sore muscles. Meaning to keep pushing despite the pain.

筋肉痛に鞭打って、今日もジムに行く。

Informal

"筋肉痛で生まれたての子鹿のよう"

— Like a newborn fawn because of muscle pain. Used to describe shaky legs.

足の筋肉痛がひどくて、生まれたての子鹿のようだよ。

Informal/Descriptive

"筋肉痛は裏切らない"

— Muscle pain doesn't betray you. Meaning if you have it, you definitely worked hard.

筋肉痛は裏切らない。昨日頑張った証拠だ。

Casual

"筋肉痛の山を越える"

— To get over the 'mountain' of muscle pain. Meaning the worst is over.

ようやく筋肉痛の山を越えた気がする。

Casual

"筋肉痛を飼いならす"

— To tame the muscle pain. Meaning getting used to the soreness of regular training.

ベテランは筋肉痛を飼いならしている。

Slang/Jargon

"筋肉痛が友達"

— Muscle pain is my friend. Expressing a commitment to constant exercise.

毎日鍛えているから、筋肉痛が友達だよ。

Casual/Humorous

"筋肉痛を置き去りにする"

— To leave muscle pain behind. To recover quickly or power through.

若さで筋肉痛を置き去りにする。

Casual

"筋肉痛に効く"

— Effective for muscle pain. Used in ads or recommendations.

この温泉は筋肉痛に効くよ。

Neutral

Easily Confused

筋肉痛 vs 筋肉

Learners often forget the 'tsuu' part.

筋肉 is 'muscle'; 筋肉痛 is 'muscle pain'.

筋肉があります (I have muscles) vs 筋肉痛があります (I have muscle pain).

筋肉痛 vs 苦痛

Both end in 'tsuu' and relate to pain.

苦痛 is 'suffering' or 'agony' (often mental); 筋肉痛 is physical muscle pain.

それは精神的な苦痛だ (That is mental suffering).

筋肉痛 vs 痛い

It's the adjective form of pain.

痛い is an adjective; 筋肉痛 is a noun.

足が痛い (Legs are painful) vs 足が筋肉痛だ (Legs have muscle pain).

筋肉痛 vs 凝り

Both involve physical discomfort.

凝り is stiffness from tension; 筋肉痛 is soreness from exercise.

肩こり (stiff shoulder) vs 肩の筋肉痛 (sore shoulder from lifting).

筋肉痛 vs 疲労

Muscle pain often accompanies fatigue.

疲労 is general exhaustion/fatigue; 筋肉痛 is specific pain.

全身の疲労 (General fatigue).

Sentence Patterns

[Body Part] が筋肉痛です。

腕が筋肉痛です。

[Activity] の後で、筋肉痛になりました。

水泳の後で、筋肉痛になりました。

筋肉痛がひどくて、[Negative Result]。

筋肉痛がひどくて、走れません。

筋肉痛を [Verb: ease/prevent/ignore] ために、~。

筋肉痛を予防するために、準備運動をします。

筋肉痛の発生は、[Cause] に起因する。

筋肉痛の発生は、筋線維の損傷に起因する。

筋肉痛、ありますか？

筋肉痛が来るのが遅い。

筋肉痛が来るのが遅いです。

筋肉痛に効く [Noun]。

筋肉痛に効く湿布。

Word Family

Nouns

筋肉 (Muscle)

痛み (Pain)

筋力 (Muscle strength)

筋線維 (Muscle fiber)

Verbs

痛む (To ache)

鍛える (To train/discipline)

解す (To loosen/unravel)

和らげる (To ease)

Adjectives

痛い (Painful)

逞しい (Muscular/Strong)

だるい (Sluggish/Languid)

湿布 (Medicated patch)

マッサージ (Massage)

筋トレ (Weight training)

プロテイン (Protein)

疲労 (Fatigue)

How to Use It

frequency

Extremely common in daily life, especially in fitness and health contexts.

Common Mistakes

Using 'kinnikutsuu-i' as an adjective. → Kinnikutsuu desu.
筋肉痛 is a noun, not an i-adjective. You cannot add 'i' to the end of it.
Saying 'Kinniku ga arimasu' when you mean you are sore. → Kinnikutsuu ga arimasu.
筋肉 means 'muscle.' 筋肉痛 means 'muscle pain.' Without 'tsuu,' you are saying you have muscles.
Using 筋肉痛 for a sudden cramp. → Ashi ga tsurimashita.
A cramp is a sudden event ('tsuru'). 筋肉痛 is the lingering ache after exercise.
Using 筋肉痛 for joint pain. → Kansetsutsuu desu.
If your knee joint hurts, it's 'kansetsutsuu.' If the muscle around the knee hurts, it's 'kinnikutsuu.'
Misspelling the kanji 痛. → 筋肉痛
The kanji for 'tsuu' (痛) is often confused with other similar-looking kanji. Pay attention to the internal strokes.

Tips

Use it as a Noun

Always remember that 筋肉痛 is a noun. Don't try to conjugate it like an adjective. Use it with 'desu', 'da', or 'ni naru'.

The 'Aging' Joke

If you want to make Japanese people laugh, mention that your muscle pain came two days late because you're 'getting old'.

Specify the Body Part

Japanese speakers often specify exactly where the pain is: 'Ude ga kinnikutsuu' (Arms are sore) or 'Senaka ga kinnikutsuu' (Back is sore).

Long Vowel 'uu'

Make sure to extend the final 'uu' sound. If you say it too short, it might sound like 'tsu', which is a different character.

Gym Context

In a gym, saying you have 筋肉痛 is often seen as a sign that you worked hard and had a good session.

Look for 'Shippu'

If you have 筋肉痛 in Japan, everyone will suggest you use a 'shippu' (medicated patch). They are very popular and effective.

Not for Injuries

Don't use this word if you actually hurt yourself (like a sprain or break). Use 'kega' for injuries.

Kanji Recognition

Focus on the kanji 'niku' (肉) in the middle. It's very common and helps you identify the word as something related to the body/meat.

Writing 'Tsuu'

The kanji for 'tsuu' (痛) has the 'sickness' radical on the outside. This is a common radical for many words related to illness or pain.

Humble Bragging

Complaining about 筋肉痛 is a socially acceptable way to let people know you've been exercising lately.

Memorize It

Mnemonic

Think of 'Kin' (like 'keen' on working out), 'Niku' (like 'meat'), and 'Tsuu' (like 'too' much pain). You were so KEEN to eat MEAT that you worked out TOO much and got muscle pain.

Visual Association

Imagine a giant piece of steak (niku) with bulging muscles (kinniku) crying because it's in pain (tsuu).

Word Web

Gym Exercise Sore Recovery Stretching Muscle Pain Fatigue

Challenge

Try to use 筋肉痛 in a sentence today to describe how you feel after your next workout or a long walk.

Word Origin

The word is a Sinitic compound (Kango) consisting of 'kinniku' (muscle) and 'tsuu' (pain). It follows the logical structure of Japanese medical and anatomical terms.

Original meaning: The literal meaning is 'muscle pain,' and it has remained consistent throughout its history in the Japanese language.

Japonic (Sino-Japanese vocabulary).

Cultural Context

It is a safe, neutral word to use in all social situations.

English speakers often just say 'I'm sore,' whereas Japanese speakers are more likely to use the specific noun 'kinnikutsuu.'

Commonly mentioned in 'shonen' sports manga like Haikyuu!! or Hajime no Ippo. Frequent topic in Japanese health variety shows like 'Gatten!' Featured in ads for products like 'Vantelin' or 'Salonpas.'

Practice in Real Life

Real-World Contexts

At the Gym

筋肉痛はありますか？
ここが筋肉痛です。
筋肉痛が治りません。
筋肉痛でもトレーニングしていいですか？

At the Office

週末のゴルフで筋肉痛だよ。
筋肉痛で動きが鈍いんです。
階段が筋肉痛に響きます。
ひどい筋肉痛ですね。

At a Pharmacy

筋肉痛に効く薬はありますか？
筋肉痛用の湿布をください。
塗り薬の方が筋肉痛に効きますか？
これは筋肉痛にいいですか？

After Sports Day

明日は絶対筋肉痛だ。
お父さん、筋肉痛大丈夫？
全身筋肉痛で動けないよ。
筋肉痛が二日後に来たよ。

During a Hike

足が筋肉痛になりそう。
筋肉痛にならないようにゆっくり歩こう。
もう筋肉痛が始まったかも。
明後日の筋肉痛が怖い。

Conversation Starters

"昨日のジムのせいで、今日はひどい筋肉痛なんです。"

"筋肉痛って、運動した直後より翌日の方が痛くないですか？"

"筋肉痛を早く治すいい方法を知っていますか？"

"最近、ちょっと運動しただけで筋肉痛になるんですよ。"

"筋肉痛が二日後に来るのって、やっぱり年齢のせいでしょうか？"

Journal Prompts

今日は久しぶりにランニングをしました。明日の筋肉痛が心配ですが、気分はとても良いです。

全身がひどい筋肉痛です。昨日の引っ越しの手伝いが原因ですが、友達が喜んでくれたので良かったです。

筋肉痛を和らげるために、今日はゆっくりお風呂に入ってストレッチをしました。早く治るといいな。

最近の運動不足を痛感しています。階段を上っただけで筋肉痛になるなんて情けないです。

新しいトレーニングを始めたら、今まで感じたことのない場所に筋肉痛が来ました。効いている証拠ですね。

Frequently Asked Questions

10 questions

No, it is a noun. You cannot say 'kinnikutsuu-i.' You should say 'kinnikutsuu desu' or 'kinnikutsuu ni naru.' For example, 'Ashi ga kinnikutsuu desu' (My legs are sore).

You can say 'Kinnikutsuu ga hidoi desu' or 'Hageshii kinnikutsuu desu.' 'Hidoi' is more common in casual settings, while 'hageshii' sounds a bit more intense.

There is a common belief/joke that if muscle pain comes the next day, you are young. If it comes two days later, you are old. People often say 'Asatte kinnikutsuu ga kuru kana' (I wonder if the pain will come the day after tomorrow).

No. For a headache, you use 'zutsuu' (頭痛). 筋肉痛 is strictly for pain in the muscles caused by physical activity.

The most common are 'naru' (to get), 'arimasu' (to have), 'kuru' (to come), and 'naoru' (to heal). Example: 'Kinnikutsuu ga kita!' (The muscle pain has arrived!)

In daily Japanese, 筋肉痛 is the standard term for what English speakers call DOMS (Delayed Onset Muscle Soreness). The technical term is 'chihatsusei kinnikutsuu,' but people just say 'kinnikutsuu.'

You can say 'Warai-sugite fukkuin ga kinnikutsuu da' (My abs are sore from laughing too much). This is a very common expression.

No, a pulled muscle is 'nikubanare.' 筋肉痛 is for the general soreness that is part of a healthy recovery process, not an acute injury.

It is a neutral word. You can use it with friends, at the gym, or even at a doctor's office. It is appropriate for almost any context.

It is 筋肉痛. 筋 (muscle), 肉 (flesh), and 痛 (pain). Knowing these three kanji will help you recognize the word easily in writing.