Stillness is not automatically subtle or truthful. It becomes useful when the character is listening, withholding a response, concentrating, deciding, or trying to control the situation.
Stillness can direct attention
When unnecessary movement stops, the audience may notice a change in focus or thought. This can be powerful in a close shot, but it should suit the scene.
Do not confuse stillness with emptiness
A person can be motionless and disengaged. Keep a clear objective and remain in relationship with the other character. Ask what you are receiving, resisting, or deciding.
Let the scene determine scale
Comedy, action, intimate drama, and different directing styles use different performance scales. The aim is not always to be minimal.
Review the cause of movement
If you move every time you speak, test whether some movement is automatic decoration. Keep movement that serves the character’s intention or physical circumstances.
Try it in your next rehearsal
Perform a short exchange with minimal movement but active listening. Then repeat it with one purposeful movement tied to the objective. Compare which version better communicates the scene’s change.