In 15 Seconds
- Standard way to say 'build muscle' or 'bulk up' in Japanese.
- Combines 'kinniku' (muscle) with 'tsukeru' (to attach or add).
- Used in fitness, health, and casual body-image conversations.
Meaning
This phrase is the most natural way to say you're working on getting stronger or 'bulking up.' It literally means 'attaching muscle' to your body through exercise and diet.
Key Examples
3 of 6Talking about gym goals
夏までに筋肉をつけたいです。
I want to build muscle by summer.
Explaining a diet change
筋肉をつけるために、毎日プロテインを飲んでいます。
I drink protein every day to build muscle.
Advice from a doctor
健康のために、もう少し筋肉をつけたほうがいいですよ。
For your health, it is better to build a little more muscle.
Cultural Background
In recent years, Japan has experienced a massive 'muscle boom' driven by social media and health variety shows. The phrase 'Muscle won't betray you' became a national meme, emphasizing that hard work in the gym always yields visible results, unlike other life pursuits. This has shifted the cultural ideal from being 'slender' to being 'toned' or 'slim-macho.'
The 'Result' vs 'Action'
If you want to say someone *has* muscle (is already buff), use `筋肉がついている` (kinniku ga tsuite iru) instead of the action `つける`.
Don't confuse with 'Chikara'
While `chikara o tsukeru` sounds similar, it usually refers to gaining skills or general power, not physical muscle mass.
In 15 Seconds
- Standard way to say 'build muscle' or 'bulk up' in Japanese.
- Combines 'kinniku' (muscle) with 'tsukeru' (to attach or add).
- Used in fitness, health, and casual body-image conversations.
What It Means
筋肉をつける (kinniku o tsukeru) is your go-to phrase for fitness goals. 筋肉 means muscle. つける is a versatile verb meaning to attach or add. Together, they describe the process of building physical mass. It is not just about being healthy. It specifically focuses on the gains. Think of it as adding a new layer to your physique.
How To Use It
You will usually pair this with a goal. For example, 筋肉をつけたい means 'I want to build muscle.' You can use it with frequency words like もっと (more). It functions as a standard transitive verb phrase. You do the action to your own body. It sounds active and determined. Use it when discussing your new gym routine. It works perfectly when talking about protein shakes too.
When To Use It
Use it at the gym with your trainer. Use it when friends ask why you are eating so much chicken. It is perfect for New Year's resolutions. You can use it in a medical context too. Doctors might suggest it for older patients. It is a very common topic in Japanese offices now. Health consciousness is at an all-time high in Japan.
When NOT To Use It
Do not use this for gaining weight in general. For that, use 太る (futoru). If you are talking about general fitness, use 運動する. If you are already ripped, do not use つける. Instead, use 維持する (maintain). Also, do not use it for mental strength. That requires different phrases like 精神力を鍛える. It is strictly for the physical stuff.
Cultural Background
Japan is currently obsessed with 'Kin-tore' (muscle training). A famous NHK show catchphrase is 筋肉は裏切らない. This means 'Muscle will not betray you.' Being 'macho' used to be niche in Japan. Now, it is a mainstream symbol of self-discipline. Even 'Idols' are now expected to be toned. Building muscle is seen as the ultimate self-care. It is about longevity and looking good in a suit.
Common Variations
You will often hear 筋肉を鍛える (kitaeru). This means 'to train muscles.' ムキムキ (muki-muki) is the sound-effect word for being buff. If you want to sound more professional, use 筋力を高める. This means 'to increase muscle strength.' For a very casual vibe, just say 筋トレする. That covers the whole process of working out.
Usage Notes
This is a neutral collocation suitable for almost any situation. The only 'gotcha' is ensuring you use the particle `o` when you are the one doing the training, and `ga` when describing a state.
The 'Result' vs 'Action'
If you want to say someone *has* muscle (is already buff), use `筋肉がついている` (kinniku ga tsuite iru) instead of the action `つける`.
Don't confuse with 'Chikara'
While `chikara o tsukeru` sounds similar, it usually refers to gaining skills or general power, not physical muscle mass.
The 'Macho' compliment
In Japan, calling someone `macho` is usually a high compliment, and they will likely respond by telling you how they `kinniku o tsuketa`.
Examples
6夏までに筋肉をつけたいです。
I want to build muscle by summer.
A very common goal-setting sentence using the 'tai' form.
筋肉をつけるために、毎日プロテインを飲んでいます。
I drink protein every day to build muscle.
Uses 'tame ni' to show the purpose of an action.
健康のために、もう少し筋肉をつけたほうがいいですよ。
For your health, it is better to build a little more muscle.
A polite suggestion using 'hou ga ii'.
最近、ちょっと筋肉ついてきたかも！
I think I might have put on some muscle lately!
Uses the intransitive-like resultative form to show progress.
筋肉をつけすぎて、お気に入りのシャツが着られなくなった。
I built too much muscle and can't wear my favorite shirt anymore.
A 'suffering from success' joke common in gym culture.
筋肉をつけることで、自分に自信が持てるようになりました。
By building muscle, I have come to have confidence in myself.
Expresses a deep emotional connection between fitness and self-esteem.
Test Yourself
Fill in the blank to say 'In order to build muscle, I go to the gym.'
筋肉を___ために、ジムに通っています。
We use the dictionary form 'tsukeru' before 'tame ni' to express purpose.
Choose the correct particle for 'Building muscle.'
筋肉___つける。
The particle 'o' marks the direct object 'muscle' being added to the body.
🎉 Score: /2
Visual Learning Aids
Formality of 'Kinniku o tsukeru'
Slangy gym talk.
筋トレして筋肉つけるわ。
Standard conversation with friends or colleagues.
筋肉をつけたいです。
Medical or professional fitness advice.
筋肉をつけることが重要です。
Where to use 'Kinniku o tsukeru'
At the Gym
Talking to a personal trainer about goals.
At the Dinner Table
Explaining why you are eating extra chicken breast.
Doctor's Office
Discussing bone density and physical health.
Social Media
Posting a progress photo of your gains.
Practice Bank
2 exercises筋肉を___ために、ジムに通っています。
We use the dictionary form 'tsukeru' before 'tame ni' to express purpose.
筋肉___つける。
The particle 'o' marks the direct object 'muscle' being added to the body.
🎉 Score: /2
Frequently Asked Questions
10 questionsNot necessarily! It can mean anything from toning up slightly to becoming a pro bodybuilder. It just means adding muscle mass.
No, this specifically refers to gaining muscle. For weight loss, you should use 痩せる (yaseru).
Yes, if the topic is health or hobbies. It is a neutral phrase, so it isn't rude, but it's not 'business formal' either.
Tsukeru focuses on the result of adding mass, while kitaeru focuses on the process of training and hardening the muscle.
You can say 筋肉をつけようとしています (kinniku o tsukeyou to shite imasu) to show you are in the middle of the effort.
People often just say 筋トレ (kin-tore) which is short for muscle training, covering the whole lifestyle.
Yes, if you are talking about a racehorse or a dog getting stronger, 筋肉をつける works perfectly.
Use o (を) because you are 'attaching' the muscle. If you are describing someone who already has it, use ga (が).
No, it is gender-neutral. Both men and women use it frequently when discussing fitness.
Using fuyasu (increase) instead of tsukeru. While fuyasu makes sense, tsukeru is the natural collocation.
Related Phrases
筋トレ (きんとれ)
Weight training / Muscle training
筋肉を鍛える (きんにくをきたえる)
To train/strengthen muscles
ムキムキ
Muscular / Buff / Ripped
細マッチョ (ほそまっちょ)
Slim-macho (lean but muscular)
