For the first four months of my swim training, breathing was my enemy. Not the cold water. Not the technique. Not the burning shoulders. Breathing. I'd hit the 25-metre mark gasping, heart pounding against my ribs, convinced I was about to sink straight to the bottom of the lane. Coaches kept telling me to "relax" — which, when you're panicking with water rushing around your face, is spectacularly unhelpful advice.
Eight months later, I swim 2000m on a Tuesday morning before work and barely notice my breathing. It's automatic, like walking. Here's what changed — and exactly how you can fix the same problem if it's been quietly destroying your swims.
The Real Problem: I Was Holding My Breath
The breakthrough came one Tuesday when my masters coach watched me swim a 50m and said, almost casually, "You're holding your breath underwater." I stared at her. Of course I wasn't holding my breath — I was breathing every three strokes like she'd taught me. She shook her head: "You're breathing in. You're not breathing out."
That single observation rewired my entire approach to swimming. I was treating each stroke cycle like a single giant breath-hold — inhale when I turn my head to the side, then close everything and hold until I turn again. My CO2 was building up the entire time my face was in the water. By lap two, my body was screaming for relief, and what I interpreted as "needing more air" was actually "needing to get rid of carbon dioxide." It's a critical difference. Adding more inhalations doesn't solve the problem. Releasing the air you're already holding does.
"Breathing in swimming isn't about getting air in. It's about letting CO2 out."
The Fix: Continuous Underwater Exhalation
The solution sounds almost insultingly simple: exhale slowly and continuously through your nose and mouth while your face is in the water. Not a held breath. Not a delayed exhalation right before you rotate to breathe. A steady, controlled stream of bubbles for the entire time your face is submerged.
Done correctly, by the time you rotate your head to breathe, your lungs are already half-empty — so inhaling becomes natural, calm, and easy. You're not gulping for air after a held breath. You're just topping off what you've already partially released. The physiology changes completely. So does the feeling of swimming.
This took about two weeks of conscious practice to become automatic. The first sessions felt forced and strange. I had to consciously think "blow out, blow out, blow out" with every stroke. But the brain learns patterns quickly when you give it the right one — and within a month, my body had absorbed the new rhythm without thinking about it at all.
The Drill That Made It Click
My coach had me start with something called "bubble drills" — standing at the shallow end of the pool, face submerged, doing absolutely nothing but exhaling through my nose in a slow, controlled stream. Not blowing forcefully. Streaming. Ten minutes of this exercise felt borderline ridiculous. I was a grown adult standing in a swimming pool blowing bubbles like a toddler.
But then I applied the same pattern in actual swimming, and I swam 200 metres without stopping for the first time in my life. The bubble drill had isolated the one variable I'd been getting wrong, and once it was retrained, everything else fell into place. My stroke felt smoother. My heart rate stayed lower. The panic that used to set in around the 30-metre mark simply didn't arrive.
Before your main set, do 4×25m where your ONLY focus is exhaling continuously underwater. Ignore your speed. Ignore your stroke count. Ignore your technique. Just breathe out from the moment your face hits the water until you rotate to inhale. Two weeks of this drill changed my swimming permanently. It will likely change yours.
The Bilateral Breathing Decision
Once continuous exhalation became automatic, my coach introduced bilateral breathing — alternating which side I breathe to every three strokes instead of every two. I resisted this at first. Breathing every two strokes felt safer and more familiar. But there's a real benefit: it balances your stroke, prevents one-sided shoulder fatigue, and prepares you for open water swimming where wind, sun glare, or other swimmers may make one side genuinely impossible to breathe to.
For triathlon swimming specifically, bilateral breathing is non-negotiable. Race-day conditions are unpredictable. The athlete who can only breathe to one side is one wave away from a very bad day. The transition was difficult for about three weeks. Then, like everything else, it became automatic.
Where I Am Now
Eight months after the bubble drill epiphany, I swim 2000m sessions on Tuesday mornings before work and barely think about breathing. It's no longer a conscious process. The continuous exhalation happens by itself. The rotation happens by itself. The inhale is calm and small and effortless. I think about my stroke. I think about my pace. I think about my catch and pull. Breathing has finally moved out of the foreground entirely.
What I want you to take from my story is this: if breathing is destroying your swims, you're not weak. You're not a "bad swimmer." You're not someone who "just doesn't do well in water." You're someone who hasn't yet been taught the right pattern. The fix is mechanical, not psychological. Drill the right pattern in — slowly, deliberately, with patience — and the panic disappears on its own.
Start with the bubbles. That's it. That's the whole secret. Ten minutes of standing in the shallow end blowing controlled streams of air. It really is that simple — and that powerful.