What does it mean that physical proximity and emotional contagion?

The closer you are to someone physically the more you absorb their emotional state.

Example: You work in an open-plan office. Your desk is two feet from a colleague who has been anxious about a product launch for weeks. You have no involvement in the launch. Your own projects are on schedule. Yet by late morning you notice tension across your shoulders, a tightness in your jaw, and a low-grade sense of urgency that has no referent in your own work. You drink a second coffee, thinking you are tired. You snap at a Slack message that does not warrant it. By lunchtime you feel as though you are behind on something, though you cannot name what. When you eat lunch outside — alone, fifty feet from the building — the feeling dissolves within ten minutes. You return to your desk, and within an hour the urgency is back. The emotion was never yours. It was transmitted through eight hours of shared air: your colleague's rapid breathing, her tense posture leaking into your peripheral vision, the micro-expressions of worry you processed below conscious awareness every time you glanced sideways. Physical proximity turned her anxiety into your afternoon.

Try this: For the next five days, keep a Proximity-Mood Log. At three points each day — morning, midday, and evening — record your current emotional state and your physical context: who is within six feet of you, what is the setting (open office, private room, transit, home), and how long you have been in that configuration. Also note any mood shifts that occurred during the day and the physical proximity conditions at the time of the shift. At the end of the five days, review the log for patterns. Do specific people or specific spatial configurations correlate with mood changes that have no personal explanation? Are there environments where you consistently feel worse or better than your baseline, independent of what is happening in your own life? Identify the two or three highest-contagion physical contexts in your daily routine.