muri o suru to karada no guai ga waruku naru.

subject particle

Breakdown of muri o suru to karada no guai ga waruku naru.

• の: possessive case particle
• と: conditional particle
• なる: to become

Questions & Answers about muri o suru to karada no guai ga waruku naru.

What does the particle と do in this sentence?

Here, と marks a conditional meaning “if/when,” especially for a natural, automatic result. It’s used for general truths or predictable outcomes: 無理をすると “if/when you push yourself too hard,” then the result happens: 体の具合が悪くなる “your condition gets worse.” With this と-conditional, you typically can’t put a request/command/volitional in the result clause. Compare: 春になると暖かくなる “When spring comes, it gets warm.”

Do I need the を after 無理? Can I say 無理すると?

With noun + する expressions, を is common but often optional in casual speech. So both 無理をする and 無理する mean “to overdo it/push yourself too hard.” Using を can feel a bit more careful or neutral; without を feels a touch more casual. Your sentence works fine as 無理すると体の具合が悪くなる in everyday speech.

Why is it 体の具合 and not 体が? Can I say 体が悪くなる?

In Japanese, the thing that is “bad” here is the condition (具合) of the body, not the body itself. So we say 体の具合が悪い/悪くなる. Saying 体が悪くなる is unnatural because “bad” isn’t typically predicated directly of the body; we describe the body’s condition/state instead.

Why does the sentence use が after 具合 and not は?