This Is What “Addiction” to Nicotine Is Really About
A spiral of physiological manipulation: nicotine’s trick disguised as relief
At the afterparty
An opera student goes out after a performance and is surprised to find how many singers smoke. It seems contradictory: why would people whose livelihood depends on their voice lean on cigarettes? But once you understand the physiology, it makes an uncomfortable kind of sense.
Over-breathing and the CO₂ problem
Most singers — like many swimmers — are trained to take in big breaths. The culture of their practice encourages over-breathing. But breathing more doesn’t mean more oxygen to the body; it means less carbon dioxide (CO₂).
CO₂ is not just a waste gas — it’s our natural muscle relaxant. When levels drop, the smooth muscle around the airway tightens, and the large blood vessels that supply the brain constrict. The result: more tension, less blood flow, and less steady function.
Frank Sinatra worked differently. He trained lung capacity through underwater swimming and learned to relax his airway, giving him the control to sustain long phrases without strain. That kind of technique doesn’t just preserve a voice — it supports the singer’s whole system. The ones who conserve CO2 tend to last longer, on stage and in life.
Nicotine’s quick trick
Nicotine plays on the same pathway: it pulls a trick that looks liks CO2 conservation, but it’s only a shortcut. When someone inhales a cigarette, the nicotine first acts on the inner lining of the airway.
Nicotine is a
powerful
topical
vasoconstrictor.
It shrinks the little surface capillaries of the mucus membrane lining of the airway. This slight but significant shrinkage increases the net size of the airbag — the bronchial tree as a whole. This makes each breath a little slower and allows for the retention of CO2. With a little more CO2 retained in the blood, smooth muscle walls of the body’s tubes relaxes and opens. Blood flow to deeper organs — including the heart and brain — improves — briefly.
That’s the bait. The drag worked.
The payback
But nicotine doesn’t stop there. Within 20–30 minutes it’s absorbed into the bloodstream, and now the systemic effects kick in: raised heart rate, faster breathing, loss of CO2 and tighter smooth muscle. Back to that slightly reduced blood flow to the brain — you feel a little less relaxed. The airway smooth muscle walls have tightened again. The central blood vessel walls have tightened again.
What nicotine gives, it takes back — and more. That’s the spiral: short-lived relief, followed by deeper tension. The body is nudged toward the next cigarette to chase the same fleeting effect.
Beyond willpower
This is why “addiction” is the wrong word if it’s used to imply weakness. The cycle isn’t about moral failure. It’s about being caught in a spiral of manipulated physiology. Nicotine really does open the airway — and that’s the hook. Then it slams it shut, driving CO₂ lower, tipping the body further into imbalance, and perpetuating the dependence.
For singers and swimmers — groups already pushed toward over-breathing by their very practice — the trap is set even more tightly.
Closing thought
Originally, tobacco wasn’t a background habit. Indigenous growers used it sparingly, to prepare for intense activities — hunting, ceremony, ritual — moments that demanded energy and focus. Nicotine gave a quick opening of the airway and a burst of alertness. But it did so by forcing off CO₂, right when the body would soon need to buffer the acid of energy production. Occasional use made sense within those boundaries. Constant use destroys them.
Nicotine opens the airway — that’s the bait. Then it slams it shut, making things worse and locking the body into dependence. The relief is real, but short lived and borrowed. The bill comes back with interest.
About the Author:
Catherine Broué works with the body as a whole system, focusing on breath and the nervous system. After two decades in ICU and dialysis, she turned to the deeper question of real health, guided by mentors and the insights of Christian Bohr and Konstantin Buteyko. Her work centres on the body’s true regulators — breath and the central nervous system — and the return to parasympathetic dominance.