You notice when you have bad vs good posture physically (eg straight back vs slouching).
What are your personal signs that you’re adopting bad vs good posture mentally? As evident in speech patterns/tics etc?
Your physical posture can affect your mental state. For example, a low-confidence pose (slouching) can cause you to feel less confident, which affects how you speak
But mainly, it's physical. Slouching also reduces the performance of important muscles in your neck