How Stress Impacts the Nervous System

Hey everyone, welcome back to the Revive Chiropractic podcast. I’m Doctor Jae ho Roh, your chiropractor here in Sunnyvale, and today we’re talking about something that affects pretty much every single one of us — stress. Now, I know what you might be thinking. Stress is just a feeling, right? It’s just life. But here’s the thing — stress is so much more than just a mental experience. It has real, physical effects on your body, and specifically on your nervous system. And once you understand that connection, a lot of things start to make sense.

So let’s start with the basics. Your nervous system is essentially the master controller of your entire body. It runs everything — your heart rate, your breathing, your digestion, your muscles, all of it. And within that system, you have two main modes. Think of them like gears. You’ve got your rest and digest mode — that’s the calm, relaxed state where your body heals, recovers, and functions at its best. And then you’ve got your fight or flight mode — that’s your body’s emergency response. It’s designed to kick in when there’s real danger, like if you had to run from something threatening. Your heart speeds up, your muscles tighten, your breathing gets shallow. Your body is ready to react fast.

Now here’s where it gets really interesting. Your nervous system cannot tell the difference between a physical threat and an emotional one. A stressful email from your boss, a tough commute on two eighty, worrying about your kids — your body responds to all of that the same way it would respond to actual danger. It fires up that fight or flight response. And that’s fine if it happens every once in a while and then you recover. That’s what it’s designed for. The problem is — most of us are living in that fight or flight state almost constantly. And that’s where things start to break down.

When your body is stuck in that stress response for a long time, the muscles in your neck, shoulders, and back start to tighten up and stay tight. Your posture changes. Your breathing stays shallow. And over time, that chronic tension can start to affect how your spine moves and how your nervous system communicates. You might start noticing headaches, or tension in your neck, or that your upper back just feels like it’s carrying the weight of the world. And honestly — it kind of is.

Here’s something I really want you to take away from today. The spine and the nervous system are deeply connected. Your spinal column actually houses and protects your spinal cord, which is a major highway for nervous system signals. When the muscles and joints around the spine get locked up from chronic stress and tension, that can interfere with how those signals travel through your body. It’s one of the reasons why stress so often shows up as physical pain — because the body and the nervous system are not separate. They are one system.

So what can you actually do about this? A few simple things to start. First — breathe. Seriously, deep intentional breathing is one of the fastest ways to shift your nervous system out of fight or flight and into that calm recovery mode. Try taking slow, deep breaths where your belly rises — not just your chest. Even just a few minutes of that can make a real difference. Second — move your body. Gentle movement like walking, stretching, or yoga helps release that built-up muscle tension and signals to your nervous system that you are safe. Third — be aware of your posture. When we’re stressed, we tend to hunch forward, round our shoulders, and drop our heads. That position actually reinforces the stress response. Try to open up your chest, relax your shoulders, and lift your gaze.

Now, if you’ve been dealing with ongoing tension, headaches, neck pain, or that feeling of just being wound too tight — that’s a really good reason to come in and get evaluated. At Revive Chiropractic, we look at how your spine and nervous system are functioning together. Gentle, specific chiropractic care can help restore movement to areas of the spine that have gotten stuck, which supports your nervous system in shifting back toward that calm, healing state. You don’t have to just live with the physical toll that stress takes on your body.

Thank you so much for tuning in today. I hope this gave you a clearer picture of just how real the connection is between stress and your physical health. If you have questions or you’re ready to come in and see us, give us a call or visit us right here in Sunnyvale. We are always happy to help. I’m Doctor Jae ho Roh, and we’ll see you next time on the Revive Chiropractic podcast. Take care of yourselves, everyone.