Usage patterns
姿勢がいい/悪いto have good/bad posture
She always has good posture.
前向きな姿勢a positive attitude/approach
He tackles everything with a positive attitude.
姿勢を保つto maintain one's posture
It's hard to maintain the same posture for a long time.
〜という姿勢で臨むto approach (something) with a stance of ~
The company is approaching this with a commitment to sincere handling.
姿勢を崩すto lose one's posture; to slouch or collapse one's stance
I got tired and let my posture slip.
消極的な姿勢a passive/reluctant stance
The government is showing a reluctant stance toward reform.
Expressions
姿勢を正すstraighten one's posture; sit up straight