natural posture (esp. in judo); natural stance
natural attitude; relaxed manner; calm manner
自然体で面接に臨んだ。
I went into the interview in a natural, relaxed way.
柔道では自然体が基本的な構えとなる。
In judo, the natural stance is the fundamental posture.
彼女はいつも自然体で話すのでみんなに好かれている。
She always talks in a natural, easy way, which is why everyone likes her.