Laughter is one of the most natural human behaviors, yet many people feel like they don’t do it enough or have lost touch with it entirely. The good news is that laughter doesn’t require anything to be genuinely funny. Your body responds to simulated laughter with many of the same physical benefits as the spontaneous kind, which means you can essentially practice your way into laughing more. Here’s how laughter works in your body and brain, why it matters, and practical ways to do more of it.
What Happens in Your Body When You Laugh
Laughter is a full-body event. It starts with a deep inhalation followed by short, spasmodic contractions of the chest and diaphragm. The intercostal muscles between your ribs are particularly active during vigorous laughter, driving the rapid bursts of exhaled air that produce the sound. Your abdominal muscles get involved too, especially the internal obliques, along with the rectus abdominis and back muscles like the erector spinae. This is why a long laughing fit can leave your stomach sore the next day.
In your brain, laughter activates a sprawling network. The anterior cingulate cortex, a region involved in emotion and social reward, acts as a kind of hub, sending signals to the prefrontal cortex, the anterior insula (which processes bodily sensations), the orbitofrontal cortex (tied to reward), and the amygdala. These aren’t just “humor centers.” They’re areas that handle social connection, emotional processing, and the physical sensation of feeling good.
Why Laughter Is Contagious
You are up to 30 times more likely to laugh when you’re around other people than when you’re alone. One of the most reliable triggers of laughter isn’t a joke. It’s hearing someone else laugh.
This happens because hearing laughter activates what researchers call an orofacial mirror network, a set of brain regions that automatically prime your facial and vocal muscles to mirror what you’re hearing. The premotor and motor areas of your brain light up, essentially preparing your body to laugh before you’ve consciously decided to. The stronger this motor activation, the more contagious you perceive someone else’s laughter to be. This is why laugh tracks on sitcoms work, and why laughing with a group feels easier and more intense than trying to laugh alone.
The Health Benefits of Laughing
Laughter lowers your stress hormones measurably. Even a single session of laughter can reduce cortisol levels by about 37%, regardless of how long the laughter lasts or what triggered it. That drop in stress hormones has downstream effects throughout your body.
Your cardiovascular system responds quickly. Watching 30 minutes of comedy increased blood flow through the brachial artery by 17% in one study, while watching a neutral documentary decreased it by 15%. Arterial compliance (how flexible your blood vessels are) improved by 10% immediately after laughing and the flow-mediated dilation remained elevated for up to 24 hours before returning to baseline. These are the same types of vascular improvements doctors look for with aerobic exercise.
Laughter also raises your pain tolerance. Research from Oxford found that pain thresholds were significantly higher after laughter compared to control conditions, both for people performing comedy and those watching it. The mechanism appears to be endorphin release: the physical act of sustained, convulsive laughter triggers your body’s natural painkillers. Synchronized group laughter may amplify this effect, similar to how exercising in sync with others roughly doubles endorphin production compared to exercising alone.
People who scored high on humor responsiveness in one clinical study also showed increased natural killer cell activity, a marker of immune function. The correlation between humor response and immune boost was strong, suggesting that how much you engage with the laughter matters.
Simulated Laughter Works Too
Spontaneous laughter and self-induced laughter use different neural pathways. Spontaneous laughter relies on midline brain structures and is tied to genuine emotional responses, while intentional laughter engages lateral motor areas, the cerebellum, and basal ganglia, more like a deliberate physical act. They feel different from the inside, and brain scans confirm they are different.
But here’s the key finding: your body doesn’t fully distinguish between the two. A principle called the “motion creates emotion” theory suggests that when you physically simulate laughter (the breathing pattern, the abdominal contractions, the facial movements), your body produces a very similar physiological response to genuine laughter. The stress reduction, the vascular improvements, and the endorphin release can all be triggered without anything actually being funny. This is the foundation of practices like laughter yoga, where participants deliberately laugh together as a form of exercise.
Practical Ways to Laugh More
Since laughter is so heavily social, the simplest strategy is to put yourself in situations where other people are laughing. Watch comedy with friends instead of alone. Attend live comedy or improv shows, where the group energy and contagion effect make laughter almost automatic. Even video calls where people are relaxed and joking count, though in-person settings tend to be more effective because of the full sensory input your mirror network responds to.
If you want to practice on your own, start with the physical mechanics. Take a deep breath, then exhale in short, rhythmic bursts while engaging your abdominal muscles, essentially the “ha ha ha” pattern. It will feel forced at first. That’s fine. Hold the pattern for 30 to 60 seconds. Many people find that simulated laughter tips over into genuine laughter after a short time, partly because the absurdity of fake-laughing alone becomes its own trigger.
Laughter yoga classes follow this principle in a group setting. Participants begin with deliberate, eye-contact-based simulated laughter and simple playful exercises. The social contagion effect takes over quickly, and most participants shift into spontaneous laughter within minutes. Classes typically run 30 to 45 minutes, and the physical workout is real: participants report muscle fatigue in their core and elevated heart rate comparable to moderate exercise.
Curating your media environment helps too. Keep a playlist of comedy specials, funny podcasts, or clips that have made you laugh before. The threshold for laughter drops when you’re already in a lighthearted state, so stacking humorous content creates momentum.
When Laughter Feels Impossible
Some people aren’t just “not laughing enough.” They’ve lost the ability to feel pleasure from things that used to bring joy, including humor. This experience, called anhedonia, is a recognized feature of depression, schizophrenia, chronic pain, and substance use disorders. It involves disrupted reward processing in the brain, not a lack of willpower or a bad attitude.
If this resonates with you, the most effective approaches supported by research include behavioral activation (scheduling and engaging in pleasurable activities even when motivation is low), mindfulness-based strategies, and a technique called savoring, where you deliberately slow down and pay attention to positive sensory experiences. A study combining behavioral activation with savoring exercises showed significant improvements in daily positive emotions compared to a control group. Critically, the consistency of practice mattered more than the specific technique. Participants who completed between-session exercises showed the greatest session-to-session improvement.
Mindfulness-based interventions have also been shown to reduce anhedonia by strengthening the brain’s response to natural rewards. In one trial with chronic pain patients, those who completed a mindfulness-oriented program brought their pleasure response scores close to normal levels. The takeaway is that the capacity for laughter and enjoyment can be rebuilt, but it often requires structured, repeated engagement rather than simply waiting for something funny to happen.