How to Breathe When Lifting Weight
Introduction
It's one of the most common questions from beginners and one of the worst explained. The usual advice — "exhale on the effort, inhale on the way down" — isn't wrong, but it's incomplete: it describes what to do with light loads and omits what anyone lifting something genuinely heavy actually does.
And there's a reason the explanation stayed short: the technique really used with heavy loads has contraindications, and many coaches would rather not mention it.
Breathing while lifting isn't about oxygen. It's about pressure.
What breathing does when you lift
When you lift something heavy, your spine needs rigidity. That rigidity doesn't come only from the back muscles: it comes largely from pressure inside the abdomen.
By taking in air and contracting the trunk musculature, the abdomen behaves like a pressurized cylinder that stabilizes the spine from within. It's the same principle as a sealed can: full and closed it resists, open it crushes in your hand.
That's why, with heavy loads, exhaling on the way up is counterproductive: you lose exactly the pressure holding you up.
The two scenarios
Light or moderate load: breathe normally
For most of what a beginner does — push-ups, bodyweight squats, medium dumbbells, machines, sets of ten or fifteen — the answer is simple: breathe continuously, exhaling on the effort phase.
In a push-up: inhale down, exhale up. In a goblet squat: inhale down, exhale up. Holding nothing.
The important thing here is not to hold your breath without realizing, which tends to happen through concentration. If you finish the set red-faced and gasping, you were holding.
Heavy load: the Valsalva manoeuvre
When the weight is genuinely demanding — low reps, squat, deadlift, heavy press — the technique every lifter uses is different, and it's called the Valsalva manoeuvre.
It works like this:
1. Before starting the movement, take air in through your mouth into your abdomen, not your chest. The belly expands in 360 degrees, not just forward. 2. Brace the trunk as if about to take a punch to the stomach. 3. Hold the air through the hardest part of the lift. 4. Exhale when the rep ends, or once you're past the demanding point. 5. Take air again and repeat for the next rep.
With sets of one to five reps you do it every rep. With longer sets, you release some air between reps and re-pressurize.
What you need to know before using Valsalva
Here's the part that gets omitted, and that should be stated clearly.
Holding your breath under effort transiently raises blood pressure, and can raise it considerably for the seconds the manoeuvre lasts. It also momentarily reduces blood return to the heart, and it's the cause of the dizziness some people feel at the end of a heavy set.
In a healthy person this is a normal, brief phenomenon: lifters have always done it. But there are situations where it's best avoided or discussed first: uncontrolled hypertension, known cardiovascular disease, aneurysms, glaucoma or retinal detachment, abdominal or inguinal hernias, pregnancy, and recent abdominal surgery.
In those cases the alternative is training with moderate loads and continuous breathing, which produces perfectly valid benefits.
And a rule that applies to everyone: if you get dizzy, see spots or feel pressure in your head, the manoeuvre is being held too long. Shorten it, reduce the load, and get checked if it recurs.
Common mistakes
Holding your breath unintentionally, on everything. The most common one. With light loads it adds nothing and produces dizziness.
Inflating the chest instead of the abdomen. Raising your shoulders as you inhale doesn't generate intra-abdominal pressure. The air goes down.
Sucking the navel in. The instruction to "hollow the abdomen" reduces pressure, which is the opposite of what you want. It expands and contracts; it doesn't hollow.
Exhaling through the hardest part of a heavy lift. You lose rigidity exactly when you need it.
Using a belt to avoid learning to breathe. A belt works because it gives you something to brace against; without correct breathing it does little.
Applying Valsalva to everything. For a set of fifteen biceps curls it's unnecessary and uncomfortable.
How to practise it
Start without weight. Lie on your back, put one hand on your abdomen and the other on your chest, and breathe so only the lower hand moves. Then do it standing.
Once you have it, try pressurizing with a light load on a squat or deadlift: take air at the bottom, brace, rise while holding, exhale at the top. You'll immediately notice the trunk feels firmer.
And a useful progression marker: if you're lifting loads where you approach failure in fewer than six reps, you're already in territory where Valsalva helps. Above fifteen reps, it's almost never needed.
Conclusion
With light loads, breathe normally and exhale on the effort. With heavy loads, take air at the bottom, brace the trunk, hold through the hard part and release at the end. Everything else is a variation on those two rules.
Try it on your next squat or deadlift: do one set exhaling on the way up and another taking air at the bottom and holding. The difference in stability is immediate, and it's the best way to understand why this matters. If you have any of the conditions listed, stay with the first version and talk to your doctor before the second.
References
- Hackett, D. A., & Chow, C. M. (2013). The Valsalva manoeuvre: Its effect on intra-abdominal pressure and safety issues during resistance exercise. Journal of Strength and Conditioning Research, 27(8).
- MacDougall, J. D., et al. (1985). Arterial blood pressure response to heavy resistance exercise. Journal of Applied Physiology, 58(3).
- Cresswell, A. G., Grundström, H., & Thorstensson, A. (1992). Observations on intra-abdominal pressure and patterns of abdominal intra-muscular activity in man. Acta Physiologica Scandinavica, 144(4).
- Haykowsky, M. J., et al. (2003). Resistance exercise, the Valsalva manoeuvre, and cerebrovascular transmural pressure. Medicine & Science in Sports & Exercise, 35(1).
- American College of Sports Medicine (2021). ACSM's Guidelines for Exercise Testing and Prescription (11th ed.). Wolters Kluwer.