Place two fingers on your neck right now. Feel your pulse. Now take a slow inhale — and notice if it speeds up, just slightly. Then exhale — and notice if it slows back down. That's not random. That's your nervous system working exactly as it should. Your heart rate is supposed to fluctuate Most people assume a healthy heart beats like a metronome. Steady. Consistent. Unchanging. The opposite is true. A heart that responds (speeding up on the inhale and slowing down on the exhale) is a healthy, flexible heart. A heart that beats at exactly the same pace regardless of what you're doing is actually a sign of a nervous system that's lost its adaptability. The phenomenon behind this is called respiratory sinus arrhythmia (RSA). The name sounds like a problem, it's not. It's an incredibly important feature. On every inhale, your heart rate rises slightly. On every exhale, it falls. Over and over, with every single breath, all day long (whether you notice it or not.) Heart Rate Variability: a key marker of nervous system health Heart rate variability (HRV) is the measurement of this fluctuation, specifically, the variation in time between consecutive heartbeats. RSA is one of the key mechanisms driving HRV. The more your heart rate...

If you've ever caught yourself looping on the same thought for the fifteenth time — replaying a conversation, spiralling on something you can't change, that low-grade mental noise that just won't quiet down — you already know that "just stop thinking about it" doesn't work. The harder you try, the louder it gets. Triangle breathing is what I reach for in those moments, to stop rumination: Inhale Hold Exhale Three equal sides. It's the technique I use most often, on myself and with clients, when the thinking has gone loopy. And the reason it works has everything to do with rhythm. I made a guided practice for it, which you'll find further down. First, the why. Rumination is a rhythm problem When you're stuck in a mental loop, two things are likely happening at the same time. Your thinking is on a treadmill. Same thought, same scenario, same circular logic, over and over. Your breathing has lost its rhythm. It's gone shallow. Gone fast. Gone irregular. The exhales cut short. The next inhale piles up on top of the last one. You probably haven't noticed any of this, because all your attention is on the thought. These two things aren't separate. They're feeding each other. Now, thoughts can...

Sometimes you can't step away. You're in the middle of a meeting You've just opened an email you weren't ready for Your kid is melting down and so are you You can feel the stress climbing (chest tightening, breath shortening, mind starting to spiral) and you have maybe ten seconds before you need to respond to whatever's in front of you. This is exactly the kind of moment the one-breath brake is designed for. One full breath cycle: One deep inhale A brief hold at the top One long exhale A pause at the bottom This simple breathing pattern can be enough to shift your physiology in the moment and help you find some stress relief. I made a short guided practice you'll find further down. But first, what's actually happening in those few seconds. Why one breath can shift your physiology There's a temptation to think a single breath can't possibly do anything. If you've ever been told to "take a deep breath" in a moment of stress and felt nothing change, you know the feeling. The reason that advice often falls flat is that one random deep breath doesn't do what people think it does. A big inhale right into the chest, taken on its own,...

If you've never paid much attention to your exhale, you're in good company. Most of us focus on the inhale — the deep breath we reach for when we're trying to calm down. But the exhale is where the actual relaxation happens. Lengthening the exhale activates your vagus nerve, slows your heart rate, and shifts your nervous system out of "activation mode." It's probably the single highest-leverage thing you can do for your breathing. I made a 15-minute guided practice for it, which you'll find further down. First, the why. Why the exhale is your nervous system's built-in brake Every breath cycle has two phases. The inhale is active. It requires muscle effort — your diaphragm contracts, your ribs lift — and it gently raises your heart rate. The sympathetic nervous system ("fight or flight") fires a little more strongly here. The exhale is meant to be the opposite. Passive. Releasing. Effortless. Your diaphragm relaxes, your lungs deflate, and your heart rate dips. This is your parasympathetic system ("rest and digest") doing its thing — and the vagus nerve, the long wandering nerve that runs from your brainstem to your gut, is the main pathway it travels through. This is wired into your physiology—for all of...

I'm Charlotte, a breath and nervous system coach working with professionals on focus, sleep, and emotional resilience. People often assume my job is teaching them to breathe a specific way every day for the rest of their lives. It's not (or at least not quite!) This piece is about what breath coaching actually changes, and why the daily practice is rarely the point. What people expect when they sign up for breath coaching The goal of breath coaching isn't to build a lifelong daily breathwork practice. Well, not necessarily. That might sound weird coming from a breath coach. But hear me out. When people sign up for coaching, they usually think the goal is some version of: Learn the techniques → build a daily practice → breathe slowly for 20 minutes a day forever And sure, that's part of it. The techniques work. The practice helps. Most clients keep some version of it going long after we're done because they like it. BUT what actually shifts is rarely the breathwork itself. It's everything that happens because of it. Three clients, three very different shifts One client, Jack, a commercial director, came into the program with bad sleep, anxiety he'd come to accept as "just how I am," and this deep...

Expanded awareness is one of the simplest — and most underrated — tools for nervous system regulation. It takes seconds, requires nothing, and has a direct physiological effect. Here's how it works and why I'm obsessed with it. I've long been fascinated by this concept of 'expanded awareness.' Fundamentally, most of us walk around in a chronically narrowed state of awareness — tunnel-visioned, locked onto whatever we're doing or thinking about. When your awareness is contracted like this, you're essentially living on railway tracks of habit. You can't get off the track because you're so tunnel-visioned. (Like you, looking at your screen right now.) Expanded awareness is what happens when you stop doing that narrowing. It's so simple, almost suspiciously simple. Like right now, I can ask you to become aware of the space above you, and the space around you. Let go of your attention on these words and on the screen, soften your gaze, and let your awareness expand as far as possible in all directions. If you notice something shift when you try that, even subtly, that’s expanded awareness. Another way I love doing this is by using sounds. Notice the furthest away sound that you could hear in any direction. Let your sense of hearing...

If there’s one idea that completely changed how I understand my own motivation, energy, and emotions—it’s this: Your daily experience = a chemical cocktail Feeling off? Irritated? Unmotivated? It’s easy to internalize that as a personal failure, like something’s wrong with you. But often, it’s not you as in you at a fundamental level. It’s your neurochemistry. We don’t talk about this enough. We expect ourselves to be focused, creative, calm, and motivated on demand—without ever learning how those states are actually created in the body. The reality is: If you want more consistent focus and energy, you need to understand the system that produces it. And once you start to understand that? You stop taking every dip in motivation so personally. You start recognizing the patterns. You start learning how to shift your state. Not with willpower, but with awareness and small, consistent tools. A Deep-Dive Series into your Neurochemistry In this series, I’m breaking down the 5 key chemicals that shape how you feel, focus, and function—day to day. Dopamine → motivation & pursuit Epinephrine → energy & alertness Acetylcholine → focus & precision Serotonin → connection & contentment Cortisol → rhythms & resilience Scientists have identified over a hundred different neurotransmitters in the human nervous system. But when it comes to peak performance and recovery… these five are key. What you’ll...

Dopamine is the chemical of motivation and pursuit—not reward. This deep dive covers what dopamine actually does in your system, how to increase dopamine naturally through daily habits, and the in-the-moment tools that boost it when you're flat or stuck. There's a molecule in your brain and body that, when released, tends to make you look for things outside of yourself—pursue something you don't yet have. That's dopamine. It's the molecule of motivation, pursuit and desire. In early environments, food, shelter, mates, and safety were not guaranteed. Humans had to move toward them, often across long distances and in dangerous circumstances. And so dopamine evolved to signal: "That thing over there could help you survive. Go get it." It's the chemical of forward action. When dopamine rises, it energizes your system: Increases willingness to put in effort Boosts focus on potential rewards Strengthens memory around success and learning Suppresses distractions and redirects attention toward the goal So this is key to understand: Dopamine doesn't reward having the thing. It rewards pursuing the thing. That's why: You can feel most alive when you're working toward something, not just when you achieve it Motivation dips when there's no challenge, novelty, or uncertainty Cheap dopamine hits (scrolling, sugar, binge-watching) trick your brain...

I used to think I was bad at focus. Some mornings, I’d feel unstoppable—sharp, clear, energized. Ideas would land. I’d knock out work in record time. Other days: total fog. I’d sit there, scrolling, staring, refreshing my inbox—waiting for my brain to click. For the longest time, I blamed myself. Not disciplined enough. Not organized enough. Not enough. But it turns out, nothing wrong with me. I was just operating on a system I didn’t understand. A system where neurochemicals drive my energy and focus. Last week, we explored dopamine—the molecule of motivation, desire, and pursuit. It’s what makes you want something, what gets you excited about a goal. Epinephrine is the molecule of energy, alertness, and action. It’s what turns that motivation into focus and action. You can think of dopamine as the spark and epinephrine as the fuel. Of course, I’m breaking these down into separate emails for clarity, but in your brain and body, these systems are deeply interconnected. The same tools that boost dopamine often also boost epinephrine. And that’s good news—because it means a few simple practices can shift your entire neurophysiology! Let’s get into it. Epinephrine: what do we need to know? Epinephrine (also known as adrenaline) is the body’s rapid-deployment ‘go’ signal. Your adrenal glands can release it as a hormone...

The human brain is built to wander. Left to its own devices—in traffic, on a trail, in the shower—attention quickly drifts. (Try counting ten slow breaths without losing track; it’s surprisingly hard!) Deep, single-task focus forces that nomadic mind to plant its flag, which is why it’s such hard work (and why most of us are pretty crap at it!) But the fact that it’s hard doesn’t mean there’s something wrong with our brain. It’s doing exactly what its designed to do. So for me, Huberman’s post is a blunt but important reminder: Stop searching for a pill or waiting for the perfect conditions. Instead, train the skill. Yes, it’s hard, but it’s worth it. However! Before we attempt a 3-hour deep-work marathon, we need the neural equivalent of marathon prep: steady mileage, smart fuel, the right gear. That means understanding and optimising the key neurochemicals involved in focus. We’ve already covered dopamine and epinephrine. Today we’re zooming in on the third player: acetylcholine. Acetylcholine: what do we need to know? Neuroscientists describe focus as a combination of three neurochemicals working together. I like this analogy to bring this to life visually: Dopamine is the propeller that drives the arrow forward, providing the motivation and drive to start and sustain your effort. Epinephrine is the arrow’s shaft, providing...