‘It’s hard not to get worked up emotionally when you’re in a tense conversation. After all, a disagreement can feel like a threat. You’re afraid you’re going to have to give up something — your point of view, the way you’re used to doing something, the notion that you’re right, or maybe even power – and your body therefore ramps up for a fight by triggering the sympathetic nervous system. This is a natural response, but the problem is that our bodies and minds aren’t particularly good at discerning between the threats presented by not getting your way on the project plan and, say, being chased down by a bear. Your heart rate and breathing rate spike, your muscles tighten, the blood in your body moves away from your organs, and you’re likely to feel uncomfortable.
None of this puts you in the right frame of mind to resolve a conflict. If your body goes into “fight or flight” mode or what Dan Goleman called “amygdala hijack,” you may lose access to the prefrontal cortex, the part of your brain responsible for rational thinking. And making rational decisions is precisely what you need to do in a difficult conversation. Not only are you losing the ability to think clearly but chances are your counterpart notices the signs of stress — your face turning red, the pace of your speech speeding up — and, because of mirror neurons that cause us to “catch” the emotions of another person, your colleague is likely to start feeling the same way. Before you know it, the conversation has derailed and the conflict intensifies.’
So how to actually control those emotions: be mindful.
HBR’s How to Control Your Emotions During a Difficult Conversation