push yourself too hard; overexert yourself
最近無理をしていませんか。
Have you been pushing yourself too hard lately?
疲れたときは無理をせず休むことも必要だ。
When you're tired, it's important to take a break instead of pushing yourself too hard.
無理をしないでね
Don't push yourself.
— The Wind Rises (2013)
無理な話だ、無理をするな。
That's impossible; don't push yourself.
無理をしないでください。
Please don't overdo it.
無理をしないように。
Don't overdo it.
健康の秘訣は無理をしないことだと思う。
I think the secret to good health is not overdoing it.