My body reacts before my thoughts

Body–Mind Connection: What Comes First—Body or Thought? For me, it often begins in the body. I notice my shoulders lifting and a diaphragm that doesn’t quite drop, which makes it harder to take deep breaths. My tendency to hyperfocus means that I work at a pace that easily speeds up, often before I’ve even had time to form a thought.

For many years, I ignored those signals. The body pointed to a need for rest, sleep, fresh air, closeness, and real conversations—but I kept going. The wheel first, me second. I was used to having many parallel thoughts and became quite good at setting them aside. But when I didn’t listen, the pressure increased.

Today, I notice it more clearly. I see how signals that don’t get space don’t disappear—they are reinforced over time and can contribute to worry and poorer sleep.

It often begins with something subtle. My breathing becomes shorter, my shoulders tense, the pace increases. Something in the body is already in motion before I’ve had time to think it through. And then it comes—a thought about my well-being or my inner state, trying to understand and create order. I’m late. I won’t have enough time. What I’m doing isn’t good enough. Someone I care about will be disappointed in me.

It’s easy to think it starts there. But often, it doesn’t.

What is the body–mind connection?

The connection between body and mind is not about two separate parts working together. It is about an integrated system where the body and brain continuously influence each other.

Interoception – how the brain perceives the body

The brain continuously interprets signals from the body—heart rate, breathing, tension, pace. This process is called interoception. It means that what we feel in the body is not just a raw signal, but already an experience that the brain has organized.

In the past, I could feel that something was wrong and assume that it was my thoughts creating the feeling. Today, I see that it can just as well be the body already signalling something—and that the thought is trying to catch up and make sense of it.

The brain predicts—not just reacts

Research by Lisa Feldman Barrett, Professor of Psychology at Northeastern University in Boston, shows that the brain does not only react to what is happening in the body—it predicts.

She is known for the theory of constructed emotion, where the brain actively creates our experiences by interpreting bodily signals in light of past experience.

This means that changes in the body, the brain’s interpretation, and the formation of a thought happen in parallel and at high speed. In practice, it feels like one single process. That is why it can seem as if the thought comes first, when it is often a meaning-making process that is already underway.

A nervous system in constant motion

We often talk about the brain as something separate from the body, but in practice they function as an integrated system. The body signals, the brain interprets, and together the experience is created.

A system in motion where everything is connected, like a web where each movement travels onward. Not something that needs to be untangled, but something that sometimes can simply be allowed to rest.

All of these processes happen at the same time, at high speed, and in continuous feedback. This is not a simple chain of cause and effect, but a complex network of signals and interpretations that influence each other in real time. It can be understood like a web of activity, where changes in one part quickly spread to others, making it difficult to say what came first.

And perhaps it doesn’t need to be sorted out. Sometimes it is enough to hold it gently, without pulling on the threads. To let your attention rest there, and allow the whole web to move slightly, back and forth. As if something in the system is given the opportunity to let go a little.

Like a web in stillness, where nothing needs to be disturbed. Where a tired spider remains at the centre, and everything is simply allowed to be as it is for a moment.

This is what is meant by Body–Mind. Not two separate entities, but one system that is constantly moving as a whole.

Why do thoughts feel so true?

When body and thought arise at the same time, they reinforce each other. A tense body gives weight to a thought, and the thought can increase tension in the body.

This creates a loop. And within that loop, the feeling of truth emerges. It does not mean that the thought is wrong. But it does mean that it feels true—partly because the body is involved.

Patterns of activation in the body

Peter Levine, a trauma expert and founder of Somatic Experiencing, has described how the body can carry patterns of activation and recovery based on past experience. This means that the body sometimes reacts quickly, before we have language for it. The pace increases, breathing changes, tension rises—before we understand why.

This is where many experience that “the body knows.” From a research perspective, however, this is not about the body thinking, but about the system reacting quickly.

“The Body Keeps the Score” – what does it mean?

The expression has become widely known, largely through Bessel van der Kolk, psychiatrist and trauma researcher with a background at Harvard Medical School. At the same time, there is a more nuanced understanding within modern affective neuroscience. According to Lisa Feldman Barrett and others, it is not the body itself that stores memories as a separate entity. It is the entire system—brain and body together—that, through experience, shapes how we respond and predict.

This does not make the experience less real. But it does change how we understand it.

What can be helpful to notice?

This is not about controlling or changing everything directly. For me, it has been about listening differently. Less focus on figuring out the thought, more on noticing what is already happening in the body.

Sometimes that means lowering my shoulders, taking a few deeper breaths, and letting the diaphragm soften—not to fix anything, but simply because it feels relieving. And often, something shifts. The grip of anxious thoughts softens.

Other times, I do nothing at all except notice what is happening.

A small shift in perspective

It is easy to try to solve thoughts by thinking more. But if thoughts are often interpretations of something already happening in the body, the direction can shift.

Not away from the thought, but alongside it. Not to change immediately, but to understand.

And perhaps, over time, to be a little less guided by what at first feels completely true.

Next time something shifts—what came first? 💚

References

Lisa Feldman Barrett – How Emotions Are Made (2017) och TED-föredraget You aren’t at the mercy of your emotions — your brain creates them | TED

Anil Seth  (2017)  – Your Brain Hallucinates Your Conscious Reality | TED

Peter Levine (1997) – Waking the Tiger

Bessel van der Kolk (2015) – The Body Keeps the Score

 

FAQ – common questions about body and mind

What is meant by the connection between body and mind?

The connection between body and mind refers to how the brain and body function as one integrated system. Signals from the body and the brain’s interpretations happen at the same time, shaping how we experience a moment. What we feel and what we think are not separate processes, but part of the same ongoing interaction.

What is interoception?

Interoception is the brain’s ability to sense and interpret signals from inside the body, such as breathing, heart rate, and muscle tension. This process often happens outside of conscious awareness, yet it strongly influences how we feel and think. It plays a central role in how experiences are created in the present moment.

Why do some thoughts feel so strong or true?

Thoughts often feel stronger when they are paired with physical activation in the body. When the body is tense or aroused, the brain gives more weight to the thought, making it feel more convincing. This does not necessarily mean the thought is accurate, but that the whole system is engaged in reinforcing the experience.

How can you start listening more to the body?

A first step is to gently notice physical signals such as breathing, pace, and tension without trying to change them right away. By pausing and observing, you may begin to see what is already happening before thoughts take over. Over time, this can create a bit more space in how you respond to your experience.