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The physiology of laughter: What happens in our bodies when we laugh?
Laughter's Magic: The neurochemistry of a good chuckle
Giggles and gains: Physical health benefits from abdominal workouts to immune boosting
Laughter in Therapy: Techniques, applications, and transformative tales
Conclusion
Further reading and references

A ubiquitous characteristic found in all humans is the ability to laugh, no matter what culture or race, this seems to be a common denominator that connects everyone. While laughing is an attribute of happiness and joy, it also has significant health implications that benefits the individual, from reducing stress levels to boosting the immune system as well as aiding with physical health. This article will delve into the various health advantages of engaging in laughter.

Image Credit: fizkes/Shutterstock.com The physiology of laughter: What happens in our bodies when we laugh?

Laughter has been found to start from infancy between the second and sixth month of newborn life and is one of the first social vocalizations in humans, with spontaneous laughter even being seen in children born as deaf or blind disabilities.  

Interestingly, this instinctive behavior that we’re genetically programmed to display, has also been found in non-human primates.

The mechanism of laughter is produced through the cooperation of various systems that work to create an expressive pattern through respiratory, facial, bodily, acoustic and cognitive alterations.

There are two different types of laughter found in humans, including involuntary emotionally-driven laughter, which is reliant on a positive emotional state, and voluntary laughter that represents the intentional reproduction of emotional laughter. 

The natural maneuver caused by laughter is stimulated by emotion, and during laughter, stress is applied to the chest wall, which causes fast and significant motion. This can lead to sudden and substantial reduction in lung volume in all respiratory compartments as well as compression of the airways.

Laughter can also impact the brain in various ways. The activation of the hypothalamic-pituitary-adrenocortical (HPA) axis and the subsequent increase in glucocorticoids is a significant physiological response to either physical or psychological stress signals. There are previous findings within adults that have suggested spontaneous laughter can affect the HPA axis through the reduction of cortisol levels, which can decrease stress. Laughter's Magic: The neurochemistry of a good chuckle

The two types of laughter cause variation in facial expressions as well as stimulating different neural pathways that control them.

Duchenne laughter, known as involuntary laughter, begins in the brain stem and limbic system, which is responsible for emotions. However, non-Duchenne laughter can be controlled by voluntary premotor regions, which is thought to contribute to planning movements, found in the frontal cortex.

A study from The Journal of Neuroscience has found social laughter to increase pleasurable sensations as well as triggering endogenous opioid release in the brain. Participants have also been found to have increased pain thresholds after watching comedy in order to induce laughter.

The increase of the brain’s production of endorphins, known as feel-good chemicals, caused by laughter, have the ability to relieve pain and decrease stress levels. The benefits of laughing | News2Me Play Giggles and gains: Physical health benefits from abdominal workouts to immune boosting

As well as reducing stress levels, laughter can also impact heart rate and blood pressure, which can help with relaxation.

Psychologist, Susan Albers, explained how humor can impact immunity in positive ways, stating, “Laughter helps to boost the immune system, which makes you more resistant to disease. Also, it decreases stress hormones, which are taxing to your immune system. On the other hand, laughter increases the antibody-producing cells and T cells in our bodies. These cells are like a defense army against illness.”

She continues with providing one of the best reasons for laughter, which is to prevent emotional eating, “when we laugh, it triggers the release of feel-good neurotransmitters. Even a subtle smile can trick your brain into thinking you are happy – thus reducing the need to munch to soothe your nerves or anxiety.” With depression becoming an epidemic in modern society, laughter can aid in improving low moods and reducing stress, even if its artificially induced.

The physical benefit of laughter is also extensive, with this joyous experience also providing a workout for bodily systems, including the cardiovascular, pulmonary and respiratory systems. Laughter causes the diaphragm, chest and abdominal muscles to tighten, driving the lungs to work harder through forcing the remaining air out and permitting fresh air deeper into the lungs, which can enable more effective exhalations, due to assisting the expansion of the alveoli.

Additionally, laughter shares common advantages that are associated with exercise, with a recent literature review confirming the physiological benefits of laughter, such as through exercising and relaxing muscles as well as improving respiration and stimulating circulation.

Simulated laughter may be ideal for the older population with functional or cognitive impairments that can access benefits of laughter more easily, with sedentary individuals being able to use laughter as part of a cardiovascular exercise program.

Interestingly, the physical act of laughter can be compared to mild cardiovascular exercise, and intense laughter through laughter exercises can be equivalent to short aerobic bursts in interval training, a type of exercise with varied intensity popular in abdominal workouts.

Image Credit: Motortion Films/Shutterstock.com Laughter in Therapy: Techniques, applications, and transformative tales

The phrase, ‘laughter is medicine’, has often been propagated through communities due to its ability to engage both the mental and physical body effectively. Laughter therapy is a type of cognitive behavioral therapy that aims to drive healthy relationships relating to physical, psychological and social wellbeing, and ultimately improves quality of life of individuals.

Laughter serves a social function and can act as a signal for a connection with another person. Research has found we are 30 times more likely to laugh within a group, or even with one other person, aiding in friendship, feelings of happiness as well as decreasing stress due to the rush of endorphins. Conclusion

Laughter has been reinforced by recent research linking various positive benefits, from physical advantages to increased pain tolerance, immune boosting impact, as well as aiding with diverse medical ailments, such as in oncology, psychiatry and rehabilitation.

With a more holistic view of medicine, functional medicine has increased in popularity, and laughter may be a natural medicinal supplement to improve the overall health of populations. Further reading and references Cleveland Clinic. It’s OK to laugh right now. Cleveland Clinic. November 27, 2023. Accessed December 1, 2023. https://health.clevelandclinic.org/its-ok-to-laugh-right-now. Greene CM, Morgan JC, Traywick LS, Mingo CA. Evaluation of a laughter-based exercise program on health and self-efficacy for exercise. The Gerontologist. Published online 2016. doi:10.1093/geront/gnw105 Is laughter good for lung health? American Lung Association. Accessed December 1, 2023. https://www.lung.org/blog/laughter-for-lungs. Kramer CK, Leitao CB. Laughter as medicine: A systematic review and meta-analysis of interventional studies evaluating the impact of spontaneous laughter on cortisol levels. PLOS ONE. 2023;18(5). doi:10.1371/journal.pone.0286260 Manninen S, Tuominen L, Dunbar RI, et al. Social laughter triggers endogenous opioid release in humans. The Journal of Neuroscience. 2017;37(25):6125-6131. doi:10.1523/jneurosci.0688-16.2017 Sabato G. What’s so funny? the science of why we laugh. Scientific American. August 13, 2019. Accessed December 1, 2023. https://www.scientificamerican.com/article/whats-so-funny-the-science-of-why-we-laugh/. Stierwalt EES. Why do we laugh? Scientific American. February 14, 2020. Accessed December 1, 2023. https://www.scientificamerican.com/article/why-do-we-laugh/. Stress relief from laughter? it’s no joke. Mayo Clinic. September 22, 2023. Accessed December 1, 2023. https://www.mayoclinic.org/healthy-lifestyle/stress-management/in-depth/stress-relief/art-20044456. Talami F, Vaudano AE, Meletti S. Motor and limbic system contribution to emotional laughter across the lifespan. Cerebral Cortex. 2019;30(5):3381-3391. doi:10.1093/cercor/bhz316 Yim J. Therapeutic benefits of laughter in mental health: A theoretical review. The Tohoku Journal of Experimental Medicine. 2016;239(3):243-249. doi:10.1620/tjem.239.243

Last Updated: Dec 11, 2023

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Environment

Anker SOLIX EverFrost 2 coolers + bundles $200 off, G-Force’s new DE-S cargo e-bike $1,399, EcoFlow DELTA 2 bundle flash sale, more

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May 5, 2025

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Anker SOLIX EverFrost 2 coolers + bundles 0 off, G-Force's new DE-S cargo e-bike ,399, EcoFlow DELTA 2 bundle flash sale, more

We’re starting off this week’s Green Deals with a spotlight on Anker’s SOLIX EverFrost 2 Electric Cooler discounts that are running as part of the brand’s ongoing Mother’s Day Sale, which start from $700. Next, we have G-Force’s extended e-bike savings, including its newest DE-S Premium All-Terrain Fat Tire Wide Cargo e-bike that is down at $1,399. Lastly, there’s EcoFlow’s latest flash sale that is offering a DELTA 2 bundle with an expansion battery and bag for $849, as well as an additional solar panel bundle offer. Plus, all the other hangover Green Deals from last week are in the links at the bottom of the page, rounded together in our Electrified Weekly coverage, including the free extra battery preorder deal on Rad Power’s new RadRunner Max Cargo Utility e-bike and Lectric’s teasing of its upcoming XP 4 e-bike that will be revealed tomorrow, May 6, 2025.

Head below for other New Green Deals we’ve found today and, of course, Electrek’s best EV buying and leasing deals. Also, check out the new Electrek Tesla Shop for the best deals on Tesla accessories.

Save $200 on Anker’s SOLIX EverFrost 2 40L and 58L electric coolers and bundles starting from $700

Looking back in on Anker’s SOLIX Mother’s Day Sale which is continuing through May 11, we wanted to shine a spotlight on the deals for brand’s latest release, the EverFrost 2 Portable Electric Coolers. You’ll find the 40L model discounted to $699.99 shipped here (matching at Amazon), while its 58L counterpart is down at $899.99 shipped (also matching at Amazon), as well as alternate bundles that give you a secondary removable battery below. These two models would normally run you $900 and $1,100 at full price, with these prices only having been beaten out by the February pre-sale launch discounts to $600 and $800 from Anker, while the 58L model saw a drop to $809 from Wellbots. We’ve been seeing these same discounts repeat in recent sales, bringing you another chance at $200 off the going rates for the best post-launch prices we have tracked. Head below for more information on these coolers and their bundle options, or you can get our hands-on take from our review here.

Currently only sporting the two mentioned model sizes (though there is a smaller 23L cooler slated to hit the market later in the year), Anker’s SOLIX EverFrost 2 Electric Coolers see to it that ice runs will no longer be needed during gatherings and other events. There’s currently the 40L model that provides a single compartment with dual functionality and the 58L model that has two compartments – each with dual functionality – that can cover simultaneous cooling and freezing. The big change from its predecessors is the trading of a direct cooling system for the new air-cooled system, providing compartment cooldowns at much faster speeds.

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Both the 40L and 58L models have been given dual battery ports (with the second battery either being sold separately or within bundles that you can find below), which provide up to 104 hours of continuous runtime when set to Eco Mode, according to Anker. Each of these batteries come with a 288Wh capacity and can also be repurposed as power banks when not running the coolers, giving you a little added versatility to keep personal devices juiced up with either the 60W USB-C or 12W USB-A ports. There are four ways to recharge the batteries – with a max 100W solar input, plugging the cooler into a wall outlet or 12V car port, or you can use a USB-C connection directly to the batteries. Both models sport IPX3 water-resistance ratings, as well as large 6-inch wheels for semi-rough terrain and a fold-down tray that is also used as a handle. You can get a full rundown on what to expect in our hands-on review here.

Anker’s SOLIX Mother’s Day EverFrost 2 deals:

If you’re looking to electrify your life with a backup power solution, be sure to browse the power station discounts while the Anker SOLIX Mother’s Day Sale continues through May 11, complete with free gifts that accompany select purchases. We also spotlighted the brand’s deals on its other latest release, the F3800 Plus Portable Power Station that start from $3,199.

G-Force DE-S e-bike

Get serious cargo-hauling power on G-Force’s DE-S premium all-terrain e-bike with 160-mile range for $1,399

Despite G-Force’s Spring Sale e-bike offers slated to end with April, it appears that the brand has extended the savings, giving folks a little more time to score them at these lower prices before rates are raised down the road due to tariffs. Among the continuing deals, the brand’s latest release, the DE-S Premium All-Terrain Fat Tire Wide Cargo e-bike is still being offered at $1,399 shipped. This new model normally carries a $1,799 price tag, with things uncertain as to how high it may rise in the future, with the brand’s previous Spring Sale bringing costs down to this same rate last month. It’s a solid $400 off the going rate while things last, with this being the lowest price we have tracked since the brand came onto our radar.

A serious model with equally serious cargo-hauling capabilities, G-Force’s DE-S e-bike comes with a 750W brushless geared hub motor alongside a waterproof and flame-retardant 45Ah removable battery in order to provide you with 28 MPH top speeds and up to 160 miles of pedal-assisted travel on a single charge. While this bike comes with a cadence sensor, the brand has also equipped it with an additional PAS sensor that allows the rider to control the e-bike’s output power, “eliminating the need for a torque sensor to achieve a smooth riding experience,” according to the brand.

It’s got a solid array of features that make the riding experience all the better, like the smoothed-out cruising thanks to the adjustable front fork suspension paired with the rear suspension system, further bolstered by the fat tires. Alongside these, there’s also hydraulic mineral oil brakes, a 7-speed Shimano derailleur, a 48V LED “ultra bright” headlight, an integrated taillight, an extended rear cargo rack that supports multiple load modes (cargo, passenger, child seat installation, more), hidden cable routing, removable pedals, a telescopic comfort saddle, and a backlit LCD display.

G-Force’s other e-bike deals:

EcoFlow DELTA 2 Portable Power Station

EcoFlow offers flash sale on 2,048Wh LiFePO4 DELTA 2 bundle with an expansion battery and bag at $849 (Today only)

As part of its ongoing Spring-to-Summer sale, EcoFlow has launched another 24-hour flash sale with two offers – one to provide backup power support while the other provides solar support to your power stations. The first of these offers gives you a DELTA 2 Portable Power Station bundled alongside a Smart Extra Battery (expansion battery) and a bag for $849 shipped. The combination of the station and battery would normally cost you $1,798 at full price, which we’ve been seeing in the brand’s direct 2025 sales usually falling to $949. This means that you’re getting the additional travel bag with a further $100 markdown, one of the best prices we have tracked that is also currently matching on Amazon, though, without the bag.

This is quite a solid combination for short-term off-grid power needs, as well as at-home emergency backup. With the inclusion of the extra battery, EcoFlow’s DELTA 2 power station goes from a 1,024Wh to 2,048WH LiFePO4 capacity, which you can further expand to 3,072Wh with another battery connected. It delivers up to 1,800W of steady output through its 15 port options, which surges to 2,200W for larger needs. There’s the usual array of smart controls available through its companion app, as well as the unit coming with an IP68 waterproof construction, knowing that it’ll likely accompany you out into the wilds of the world.

The station’s battery can be recharged in a short time thanks to the fast-charging tech that the brand has given it, letting you refill 80% of its battery in just 50 minutes via a wall outlet, with things taking a little longer at 80 minutes to get it back to full. Of course, there’s also the solar charging capabilities if you have or plan to buy the appropriate panels, with a max 500W input that can recharge the battery in three to six hours, depending on weather conditions.

EcoFlow is also providing the opportunity to grab two of its 110W Solar Panels at $329 shipped while these flash savings last. Outside of this discount, the panels are currently going for $209 each (and regularly run $399), making this is a great chance to score both at about $165 each, giving you the means to recharge the above station’s – or any other model – battery with the sun’s rays.

Be sure to check out the full lineup of deals we’re seeing from EcoFlow’s Spring-to-Summer Sale while they last – which is only a few days longer. You’ll also find some additional coverage of the deals on the brand’s new WAVE 3 AC/Heater and GLACIER electric coolers that are starting from $807.

Best Spring EV deals!

Best new Green Deals landing this week

The savings this week are also continuing to a collection of other markdowns. To the same tune as the offers above, these all help you take a more energy-conscious approach to your routine. Winter means you can lock in even better off-season price cuts on electric tools for the lawn while saving on EVs and tons of other gear.

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Environment

Rivian CEO posts image of the new Maximus drive unit that will power the upcoming R2 EVs

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May 5, 2025

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Rivian CEO posts image of the new Maximus drive unit that will power the upcoming R2 EVs

Rivian R2

Rivian founder and CEO RJ Scaringe just posted a fresh image of a Maximus drive unit—a vital component teased for some time now that will be a key piece in Rivian’s goal to reduce the cost per drive unit in its R2 EV builds.

Rivian continues to show strength during uncertain times in the automotive industry, particularly regarding legacy automakers’ electrification strategies. While threats to EV adoption linger, demand for Rivian’s American-made BEVs has stayed high despite a slight dip in deliveries last quarter.

The company is still riding the success of its first two flagship models—the R1S and R1T, which are now in the second generation. Better still, fans of the brand and EV enthusiasts alike are highly anticipating the arrival of Rivian’s encore to the R1 models, the R2, which will then be followed by a smaller R3 and a rally-like R3X.

As a young automaker, Rivian has overcome hurdles to establish itself in the EV industry, finally achieving scaled production at its Normal, Illinois, facility. Part of that strategy includes consistent innovation and improvement to improve vehicle function and performance for its customers and optimize manufacturing to reduce overall cost.

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An excellent example of that evolution is Rivian’s Enduro drive unit, which was implemented on dual-motor versions of the R1T and R1S. Since then, Rivian has been teasing a new drive unit called Maximus, which we thought may also make its way into R1 builds, but have since learned will debut in the upcoming R2 EVs.

Today, Rivian founder and CEO RJ Scaringe offered a close-up look at Maximus being developed within the R2 design. Check it out:

Rivian R2
The Maximus drive unit / Source: @RJScaringe / Instagram

RJ teases the Maximus drive unit in the Rivian R2

According to RJ Scaringe, the image above is Rivian’s new Maximus drive unit configuration implemented in the R2. There’s not much else of the upcoming BEV to see here, but an exciting little tidbit nonetheless.

While most consumers have been attracted to the Rivian R2’s size and look, Maximus will play a key role in Normal as the American automaker works to reduce the per-unit cost of its drive units—a primary goal it has previously shared with the public.

One key improvement we already know about is Maximus’ stator windings—one of the key components of any electric motor. Previously, Rivian shared that Maximus uses a new continuous winding technique that reduces the total welds per stator and thus the total overall cost of building each one. For comparison, Rivian’s current Enduro drive unit requires 264 stator welds, while Maximus only needs 24.

Rivian has also integrated the front rotor shaft and gear into a single forged, CNC-milled component and reduced the number of required bearings. The result is a simpler, more compact drive unit that is cheaper to build and weighs less, which is excellent news for EV range and efficiency.

With Maximus development underway, Rivian appears to remain on track to officially launch the R2 next year as promised. Be sure to check back with Electrek often for the latest Rivian news about the R2 and beyond.

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Sports

NBC’s Tirico left Derby broadcast with nut allergy

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May 5, 2025

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NBC's Tirico left Derby broadcast with nut allergy

  • Associated Press

May 5, 2025, 11:53 AM ET

NBC Sports host Mike Tirico said Monday he is feeling fine after having to leave the Kentucky Derby broadcast early over the weekend because of a strong reaction to a nut allergy.

“I’ve had a nut allergy my whole life and am usually very, very careful,” Tirico said on the “Today” show. “I ate something that had a nut in it and had a nut allergy, causing your throat and your nose and all that stuff to kind of clog up and swell. It affects your breathing a little bit.”

Tirico said he took an epinephrine shot and was treated by EMTs at Churchill Downs. He began feeling better later Saturday night.

“I’m embarrassed about the attention,” he said.

Ahmed Fareed took over for the 58-year-old broadcaster, who was hosting Derby coverage for the ninth year.

Tirico is set to host the Preakness Stakes on NBC on May 17.

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