A proper laugh starts in your chest and belly, not your throat. It’s a full-body event that engages your rib cage, abdominal muscles, and diaphragm in a coordinated burst of forced exhalation. If your laughs tend to feel tight, shallow, or strained, you’re likely holding tension in your torso and pushing sound through your throat alone. The fix is surprisingly physical: learning to breathe deeply and let your core do the work.
What Happens in Your Body During a Full Laugh
Laughter is essentially a series of rapid, forceful exhales. Contrary to what Charles Darwin originally proposed, most laughter doesn’t start with a big inhale. Instead, it begins with a sudden expiratory movement that compresses your upper and lower chest and your abdomen simultaneously.
The muscles doing the heaviest lifting are your intercostal muscles, the small bands of tissue between your ribs that contract during forced breathing. Your internal obliques (the deep abdominal muscles that wrap around your sides) also fire intensely, sometimes generating more tension than a traditional crunch exercise. Your diaphragm, the dome-shaped muscle beneath your lungs, acts as a buffer during all this compression, protecting your heart, lungs, and blood vessels from the sudden pressure spikes that come with a big belly laugh.
This is why a genuine laugh can leave you sore the next day. It’s a real physical workout involving at least five major muscle groups in your front and back torso: the internal and external obliques, the rectus abdominis, the multifidus, and the erector spinae along your spine.
How to Breathe for a Better Laugh
The single most important adjustment is supporting your laugh with breath from your chest and belly rather than squeezing it out of your throat. The National Institutes of Health notes that relying on your throat alone for any vocalization, whether talking, singing, or laughing, puts significant strain on your voice. A laugh that feels scratchy, forced, or uncomfortable is usually one that’s being generated too high up in your airway.
To practice this, try a simple exercise before you even think about laughing. Place one hand on your chest and one on your belly. Breathe in slowly and feel both hands move outward. Now exhale in short, sharp bursts, like a “ha-ha-ha,” and let your belly push inward with each pulse. That rhythmic contraction is what powers a natural laugh. Once your body learns to default to this pattern, your laughs will sound fuller and feel less effortful.
Laughter yoga uses this exact principle. Sessions typically open with deep breathing exercises (shoulder breathing, hip breathing) before moving into structured laugh exercises like “milkshake laughter,” where participants mime shaking a drink and laugh as they do it. The laughter starts as deliberate and simulated, but the combination of deep breathing and group energy often converts it into genuine, spontaneous laughter within minutes.
Why Your “Fake” Laugh Sounds Off
People can usually tell the difference between a real laugh and a performed one, and the distinction is acoustic. Spontaneous laughter is produced by an emotional vocal system that generates higher pitch, greater volume, and faster bursts of non-speech-like sounds. It’s messy, uncontrolled, and often includes snorts, wheezes, or squeaks that would be impossible to replicate on command.
A fake or polite laugh, by contrast, is produced by the same brain system that controls your tongue and lips during speech. That’s why it sounds more like talking. Researchers at the University of California describe it this way: fake laughter sounds like speech, and real laughter doesn’t.
That said, polite laughter isn’t a social crime. It functions as a cooperative signal, a way of saying “I’m with you” or “I acknowledge that was meant to be funny.” In many social settings, especially professional or unfamiliar ones, this kind of laughter is perfectly appropriate and even expected. The goal isn’t to eliminate polite laughing but to make sure you’re also creating space in your life for the real thing.
Training Yourself to Laugh More Often
If you feel like you rarely laugh deeply, it may be less about your sense of humor and more about your mental framing. Therapeutic approaches to humor use a concept captured by the acronym SLAP: Surprise, Light-heartedness, Absurdity, and Perspective development. The idea is that much of human stress comes from exaggerating the seriousness of situations. When you actively look for what’s absurd or unexpected in a moment, you create openings for genuine amusement.
Psychologist Paul McGhee developed a structured method for teaching people to be more humorous, not by memorizing jokes, but by practicing a playful perspective on everyday problems. The core technique is simple: when something frustrates or stresses you, try to find one element of it that’s genuinely ridiculous. This isn’t toxic positivity or forced cheerfulness. It’s a deliberate shift in framing that, over time, makes spontaneous laughter more accessible.
You can also just schedule it. Research published in the American Journal of Lifestyle Medicine suggests a “laughter prescription” of 30 minutes once a week, such as watching your favorite comedy, as a starting point for measurable health benefits. Even a single 20-minute session has shown positive effects on mood and stress markers.
The Health Payoff of Regular Laughter
The stress reduction alone is significant. A meta-analysis of interventional studies found that laughter reduces cortisol, your body’s primary stress hormone, by roughly 32% compared to control groups. A single laughter session dropped cortisol by nearly 37%. These aren’t small fluctuations. They’re comparable to the effects of dedicated relaxation techniques.
The cardiovascular benefits are equally striking. Research presented at the European Society of Cardiology Congress found that watching a funny movie caused blood vessels to expand, improving blood flow. The difference in blood vessel diameter between laughter and mental stress was 30 to 50%. The lead researcher noted that the magnitude of change in blood vessel function after laughing was consistent with the benefit you’d see from aerobic exercise or cholesterol-lowering medication, and the effect lasted up to an hour.
A study of 115 IT professionals who participated in seven sessions of laughter yoga found a significant drop in blood pressure compared to the control group: a decrease of about 7.5 mm Hg in the laughter group versus 3 mm Hg in the control group. The laughter group also had a significant drop in cortisol. In a separate study of older adults with depression, laughter yoga reduced depression scores as effectively as exercise therapy and additionally improved life satisfaction.
Putting It Together
A “proper” laugh is one that engages your whole torso, is supported by deep breathing, and doesn’t strain your throat. Practically, that means relaxing your shoulders, breathing from your belly, and letting the sound come from your core rather than forcing it through a tight throat. If you tend to suppress or control your laughs in social situations, practice letting go in low-stakes environments first: alone in your car, watching comedy at home, or in a laughter yoga class.
The physical mechanics matter less than the habit. People who laugh regularly, even if they start with simulated laughter, see real reductions in stress hormones, improvements in blood vessel function, and better mood scores. The best laugh technique is whatever gets you doing it more often.