You’re halfway up the hill and your breathing has gone from steady to ragged. The legs feel fine, the heart is working, but the lungs seem to be running the show. Most people assume that’s just how it is – you get older, you get more breathless. But the way you breathe during exercise isn’t something you’re stuck with. It’s a skill you can practise, and it can make a real difference to how long you can keep going and how quickly you recover.
This article is for information only and does not replace medical advice. Consult your GP before starting any new exercise programme, especially if you have a respiratory or cardiovascular condition.
Practising diaphragmatic (belly) breathing during aerobic exercise can improve performance by 3 to 5 percent – the equivalent of shaving seconds off a mile or adding a few minutes to a steady cycle.
-PMC
That number comes from a review of studies on breathing techniques and exercise. A few percent might not sound like much, but over a 30‑minute walk or a session on the bike, it means you can sustain a slightly higher effort without feeling like you’re running out of air. More importantly, it means you’re not wasting energy on inefficient breathing.
Deep breathing helps because it improves oxygen delivery to your muscles and stabilises your core. But it’s not about taking the biggest breath you can – it’s about coordinating the breath with the movement, and that’s something you can learn in a few minutes and practise anywhere.
Why breathing matters more than you think
When you walk or cycle, your muscles need oxygen to keep working. The harder they work, the more oxygen they need, and the more carbon dioxide they produce. Your breathing rate can increase up to fifteen times resting levels during intense exercise, according to fitness.edu.au. But that increase is only useful if the air is actually getting deep into your lungs where oxygen exchange happens.
Shallow, chest‑based breathing – the kind that happens when you’re stressed or tired – fills only the top part of the lungs. The diaphragm, a dome‑shaped muscle at the base of your ribcage, barely moves. With practice, you can retrain the diaphragm to drop lower on each inhale, pulling air into the full lung capacity. This is diaphragmatic, or belly, breathing. It’s the way you breathed as a child, and it’s the most efficient way to get oxygen in and carbon dioxide out.
There’s another angle. The diaphragm works with the pelvic floor and deep abdominal muscles to create intra‑abdominal pressure – a natural support system for your spine. When you exhale properly during the effort phase of a movement (think of pushing a weight or standing up from a squat), you’re not just breathing out; you’re stabilising your torso so your arms and legs can produce more force. This is why CNN reports that exhaling during the effort phase activates core stabilisers and allows greater force production.
Getting started safely
If you’ve never paid attention to your breathing during exercise, the first step is to practise when you’re not moving.
Sit in a comfortable chair, feet flat on the floor, hands resting on your lower ribs. Breathe in through your nose, and feel your ribs expand sideways and your belly rise slightly. Don’t force it – just let the air fill you from the bottom up. Then breathe out slowly through your mouth or nose, letting the ribs fall back. The exhale should be slightly longer than the inhale. That’s one diaphragmatic breath.
Place hands on lower ribs. Inhale through nose, feeling ribs expand. Exhale slowly, longer than inhale. Repeat six times.
Once you’re comfortable, try the same breathing while walking on level ground. Inhale for three steps, exhale for four. This naturally lengthens the exhale.
If you can’t maintain a steady rhythm, you’re going too fast. Slow down until the breathing pattern feels natural again.
If you feel dizzy, lightheaded, or short of breath during these exercises, stop immediately. This is not normal. Do not hold your breath for more than a couple of seconds during strength training if you have high blood pressure or a history of stroke. The Valsalva manoeuvre – holding your breath and bearing down – can spike blood pressure sharply. For most people, coordinated breathing (exhaling on effort) is safer and just as effective.
What works and what to look for
Not all breathing techniques suit every type of exercise. The right one depends on what you’re doing and how hard you’re working.
Diaphragmatic breathing for steady effort
This is the foundation. During walking, cycling, or gentle jogging, focus on belly breathing. It keeps your oxygen intake high without forcing you to think about it once it becomes habit. The New York Times notes that it can also lower blood pressure and reduce resting heart rate over time.
- Increases oxygen delivery to working muscles
- Reduces the feeling of breathlessness
- Can be practised anywhere, even while sitting
Box breathing for recovery and focus
Box breathing – inhale for four seconds, hold for four seconds, exhale for four seconds, hold for four seconds – is a well‑known technique for calming the nervous system. During exercise, it’s useful for regaining control after a hard effort. Use it at the top of a hill or after a burst of speed. Cleveland Clinic explains that slower breathing patterns support faster recovery by activating the parasympathetic nervous system.
If you find it hard to hold your breath for four seconds, start with three. The pattern is more important than the exact count. The key is equal durations for inhale, hold, exhale, hold.
Nasal breathing during moderate effort
Breathing through your nose warms and humidifies the air, which can help if you have asthma or sensitive airways. For moderate exercise – a brisk walk, a gentle cycle – nasal breathing is perfectly fine. But at higher intensities, many people feel an “air hunger” when they try to keep the mouth closed. Cleveland Clinic notes that this can be uncomfortable and may not improve performance. Let your mouth open when you need the extra air.
Breath‑hold for heavy lifts (with caution)
When you’re lifting something very heavy – a loaded suitcase, a heavy bag of compost – a brief breath hold can stabilise your spine. This is the Valsalva manoeuvre. It’s not recommended for everyday use, especially if you have high blood pressure. For most strength exercises, exhaling during the effort (the push or pull) is safer and still provides good core stability.
Your natural breathing rhythm often syncs with your running stride. Many people inhale when one foot strikes and exhale on the other. This can reduce muscle fatigue during long runs. If you notice your breathing is out of sync, try adjusting your stride length rather than forcing a different breath pattern.
Options worth considering
Once you’ve got the feel for diaphragmatic breathing, you might want to track how it affects your heart rate and recovery. A simple heart‑rate monitor can give you feedback without needing to guess. The Garmin Forerunner 965 is a watch that tracks heart rate, sleep, and recovery readiness. It’s not necessary for breathing exercises, but it helps you see the difference between a session where you focused on breathing and one where you didn’t. The screen is bright and easy to read, and the battery lasts weeks.
Another tool that can support your breathing practice is a smart body composition scale like the GE model, which measures hydration and muscle mass. While not directly about breathing, it can show how your body is responding to training over time. But honestly, the most important piece of equipment is your own body – and a few minutes of quiet attention each day.
Narrowing it down
The technique that works best for you depends on what you do and how you feel.
If you’re a walker or cyclist, start with diaphragmatic breathing and practise it daily for a week. Within a few days, you’ll notice you can walk a little further before you feel out of breath. If you’re doing strength training, focus on exhaling during the effort – that’s the push, pull, or lift – and inhaling during the return. For recovery after a tough session, box breathing will bring your heart rate down faster.
| Technique | Best for | Key point |
|---|---|---|
| Diaphragmatic | Steady aerobic exercise | Belly rises, ribs expand on inhale |
| Box breathing | Recovery and focus | 4‑4‑4‑4 pattern, equal counts |
| Nasal breathing | Moderate effort, asthma | Warms air, but not for high intensity |
| Exhale on effort | Strength training | Breathe out during push or pull |
Don’t overthink it. The goal is to make breathing more efficient, not to add another thing to worry about. If you find yourself holding your breath during a walk, just take a slow, deep belly breath and return to a natural rhythm.
- Deep belly breathing during exercise improves oxygen delivery and can boost endurance by a few percent.
- Exhaling during the effort phase of strength moves stabilises the spine and helps you produce more force.
- Practise seated first, then while walking, and let the rhythm come naturally – don’t force it.
Closing thoughts
Breathing is automatic. But that doesn’t mean it can’t be improved. A few minutes of attention each day – while you’re making tea, waiting for the kettle, or sitting on the bus – can retrain a habit that affects every step you take. The research is clear: coordinating your breath with movement makes you more efficient, less tired, and quicker to recover. And you don’t need any equipment to start.
You know your body better than any article does. If a technique feels wrong or makes you uncomfortable, leave it. There’s no single “right” way to breathe – only the way that works for you today. Try one thing, give it a week, and see what changes.
If you’d like to read more about how movement and recovery go together, you might find this article on rest days and joint health useful. And for a deeper look at the science behind exercise and longevity, this one covers the big picture.
References
The following sources were used in this article. Each is listed with a short description of what it contributed.
New York Times – Exercise breathing workout tips – Provided the 3–5% improvement statistic from PMC and the link between diaphragmatic breathing and blood pressure.
CNN – Breathing exercise strength training – Explained the connection between exhaling on effort, core stability, and force production.
Wellness Voice – Breathing exercises for endurance – Summarised the benefits of diaphragmatic, box, and nasal breathing for endurance.
Fitness.edu.au – Respiratory physiology – Provided the 15x ventilation increase and explanations of gas exchange and respiratory muscle training.
Cleveland Clinic – Sinus arrhythmia – Used for box breathing recovery and caution about nasal breathing intensity.
Cleveland Clinic – Dyspnea – Referenced for air hunger during nasal breathing at high intensity.
