How to breathe during squats and heavy lifts

“Breathe out on the way up” is the most common breathing advice in gyms. It’s also wrong for heavy barbell training.

When you’re squatting, deadlifting, or pressing heavy weight — the compound lifts that drive 5x5 — breathing normally is a recipe for a weak core, an unstable spine, and missed reps. Instead, you need a technique that creates a rigid torso - a technique that has been used by every strong lifter for decades.

It’s called the Valsalva maneuver, and learning it will immediately make your lifts feel more stable and more powerful.

Why normal breathing fails under load

Think about what happens when you squat 80kg. That weight is sitting on your back, compressing your spine. The only thing protecting your spine from buckling is the pressure inside your torso - your core muscles squeezing inward from all sides.

When you exhale during the hardest part of the lift, you release that pressure. Your torso softens. Your spine loses its support. This is why people round their backs on heavy squats or fold forward on deadlifts. Their core gave out, not their legs.

Normal breathing - in on the way down, out on the way up - works fine for bicep curls and lat pulldowns. It fails completely when there are heavy loads on your spine. You need something better.

The Valsalva maneuver step by step

The Valsalva maneuver creates maximum intra-abdominal pressure (IAP) to stabilize your spine. Here’s how to do it:

Step 1: Breathe into your belly

Take a big breath, but not into your chest. Breathe into your belly. Your stomach should push out, not your chest rise up.

This is diaphragmatic breathing. Your diaphragm pushes down into your abdominal cavity, compressing everything inside. If your shoulders rise when you inhale, you’re chest breathing - this doesn’t create meaningful core pressure.

Practice drill: Put one hand on your chest and one on your belly. Breathe so that only the belly hand moves. The chest hand stays still. Practice this lying down first, then standing, then try it with an empty bar.

Step 2: Close the glottis

Once you’ve filled your belly with air, close your throat. This is the same thing you do instinctively when you strain to push something heavy - you hold your breath and bear down.

Think about the effort of pushing a stalled car or trying to move a heavy piece of furniture. That grunting, pressurized feeling is the Valsalva. You’re trapping air inside your torso to make it rigid.

Step 3: Brace your core

Now push out against your abdominal wall from all sides. Not just the front - the sides and back too. Imagine someone is about to punch you in the stomach. That reflexive tightening is what you want, combined with the trapped air from steps one and two.

Your core should feel like a solid cylinder. Press out with your obliques (sides), your rectus abdominis (front), and your lower back muscles simultaneously. Everything tightens together.

Step 4: Lift

Maintain the brace through the entire rep. Don’t release air. Don’t exhale. Don’t loosen your core at any point during the movement. Your spine stays protected from start to finish.

Step 5: Breathe at the safe position

Once you’ve completed the rep, exhale and take a new breath at whichever position is most stable (this varies by exercise - see below). Then rebrace and do the next rep.

Every rep gets its own breath. One breath per rep. Not one breath per set.

The science behind bracing

The Valsalva isn’t just a lifting trick. It’s a well-documented physiological mechanism that dramatically increases spinal stability.

Intra-abdominal pressure

When you seal your airway and brace your core, the pressure inside your abdominal cavity increases significantly. Research published in the Journal of Biomechanics has shown that intra-abdominal pressure during the Valsalva can exceed 150 mmHg during heavy lifting.

This pressure acts as a hydraulic support for your spine. Your abdominal cavity becomes a pressurized column that resists compressive forces from the barbell. Without it, your spinal erectors must do all the work of stabilizing your spine alone - and they simply aren’t strong enough under heavy loads.

Spinal extensor support

A 1999 study by Cholewicki and colleagues found that increased IAP reduced spinal compressive forces by up to 40%. In practical terms: your spine handles 100kg much better when there’s 150 mmHg of pressure supporting it from inside than when it’s relying on muscle contraction alone.

This is why elite powerlifters, Olympic lifters, and strongman competitors all use the Valsalva. It’s not a preference or a style choice. It’s biomechanics.

Exercise-specific breathing patterns

Each lift has an optimal point to breathe. The principle is always the same: breathe where you’re most stable, hold through the rep.

Squat

Breathe at the top. Standing upright with the bar on your back is your most stable position.

1. Standing at the top, take a big belly breath
2. Brace hard
3. Descend into the squat
4. Drive up to the top
5. Exhale briefly at the top
6. Take a new breath, rebrace
7. Next rep

Never breathe in the hole (bottom of the squat). You’re in the weakest, most compressed position. Losing pressure there is how backs round and lifts fail.

For more on proper squat setup and execution, read the squat technique guide.

Deadlift

Breathe at the bottom. The bar starts on the floor and you set up before each rep.

1. Set up over the bar, hinge down, grip the bar
2. Take a big belly breath while holding the bar
3. Brace hard
4. Pull the bar to lockout
5. Lower the bar to the floor (maintaining some brace)
6. Brief exhale at the bottom
7. Rebrace before the next rep

Some lifters prefer to breathe at the top (lockout) and descend under control with the brace. Either works. The key is that you’re fully braced before the bar leaves the floor. If you lose air at the bottom, you’ll round your back off the floor - the most dangerous position in the deadlift.

For the complete deadlift technique breakdown, see the deadlift guide.

Bench press

Breathe at the top. Arms locked out with the bar over your chest is the safe position.

1. Unrack the bar, arms locked, bar over chest
2. Take a belly breath (your chest arch stays - this breath expands your belly, not your chest)
3. Brace
4. Lower the bar to your chest
5. Press to lockout
6. Exhale briefly at lockout
7. Rebrace for the next rep

Bracing on bench is slightly different because you’re lying down. The pressure still stabilizes your torso, but it also helps maintain your arch and upper back tightness. Exhaling mid-rep on bench often causes your arch to collapse, which reduces your leg drive and shortens your range of motion advantage.

Overhead press

Breathe at the bottom. The bar resting on your front deltoids is your stable position.

1. Bar on front delts, take a big belly breath
2. Brace hard - squeeze glutes too
3. Press overhead to lockout
4. Lower the bar to your shoulders
5. Exhale briefly
6. Rebrace for the next rep

Bracing is especially critical on the overhead press because there’s a strong tendency to arch your lower back as the weight gets heavy. A proper brace with glute engagement locks your pelvis and prevents the excessive arch that turns the press into a standing incline bench.

Common breathing mistakes

Chest breathing instead of belly breathing

The most common mistake. If your shoulders rise when you inhale, you’re filling your upper lungs but not creating meaningful abdominal pressure. The diaphragm needs to push down into your belly.

Fix: Practice diaphragmatic breathing daily. Lie on your back, put a book on your stomach, and breathe so the book rises and falls. Do this for five minutes before training until it becomes automatic.

Exhaling during the hardest part

Gym culture has hammered “exhale on the exertion” into everyone’s heads. This works for machines and isolation exercises. It actively hurts your performance on compound barbell lifts.

Fix: Think of each rep as: breathe, brace, lift, breathe. The brace stays through the entire movement. You don’t release air until the rep is complete and you’re in the safe position.

Holding your breath across multiple reps

Some lifters try to take one breath and do two or three reps. This is dangerous. You run out of oxygen, blood pressure stays elevated too long, and your brace degrades with each rep.

Fix: One breath per rep. Every single rep gets a fresh breath and a fresh brace. This becomes automatic with practice.

Not bracing hard enough

Taking a breath is not the same as bracing. You can fill your belly with air without actually tightening your core. The air provides a base; the muscular contraction provides the rigidity.

Fix: After breathing in, actively push your abdominal wall out in all directions. Sides, front, and back. Think “make yourself thick,” not “suck it in.”

Bracing with a belt

A lifting belt doesn’t replace bracing. It enhances it.

How a belt works

A belt gives your core something to push against. When you brace against a rigid belt, your abdominal wall can generate more force because it has external resistance. This increases intra-abdominal pressure beyond what you can achieve with bracing alone.

Research suggests a belt increases IAP by roughly 15-40%, depending on the study and the lifter. That translates to meaningfully better spinal stability on heavy lifts.

Belt bracing technique

1. Wear the belt around your belly button area, tight enough that you can just slide a finger between the belt and your skin
2. Take your belly breath - you should feel your stomach push against the belt
3. Brace hard - actively push your core out against the belt from all sides
4. The belt should feel uncomfortably tight when fully braced

If the belt feels the same whether you’re braced or relaxed, it’s either too loose or you’re not bracing hard enough.

When to introduce a belt

Learn to brace without a belt first. Once your breathing and bracing technique is solid (usually a few months into training), a belt becomes a useful tool for your heaviest sets. Most lifters use a belt for working sets and skip it for warm-ups.

Practice drills for beginners

If you’re new to bracing, it takes a few weeks to make it automatic. Here are drills to speed up the process.

The balloon drill

Blow up a balloon while keeping one hand on your belly. Notice how your core engages and your diaphragm pushes down. This is the same muscular pattern as bracing under a bar.

Dead bug with breathing

Lie on your back, knees at 90 degrees, arms straight up. Take a belly breath, brace your core, and slowly extend one arm overhead while extending the opposite leg. Your lower back should not arch off the floor. If it does, your brace isn’t strong enough.

Empty bar practice

Do your warm-up sets with an empty bar using exaggerated breathing. Pause at the top of each squat for a full 3-second inhale and brace. This builds the habit before load demands your attention.

The hand test

Have a training partner press on your stomach from the front and sides while you brace. You should be rigid enough that they can’t push in. If your belly is soft in any direction, you’re not bracing fully.

Putting it all together

Proper breathing and bracing is not an advanced technique. It’s a fundamental skill that should be learned from your first day under a barbell. Every rep of every set should be braced - warm-ups included, because that’s where you build the habit.

The sequence is always the same: belly breath, close throat, brace everything, lift, complete the rep, breathe at the safe position, rebrace, next rep.

It feels awkward for about two weeks. After that, it’s automatic. And you’ll notice immediately that weights feel lighter, your torso feels more solid, and your reps are more consistent.

Breathing is the most underrated skill in barbell training. Master it and everything else gets easier. For the full technique breakdown of every lift, visit the exercise guide.

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