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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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Sir Keir Starmer could be ousted as PM within months, two senior Labour MPs tell Sky News

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Sir Keir Starmer could be ousted as PM within months, two senior Labour MPs tell Sky News

Two senior Labour MPs have suggested the prime minister may have to go within months if the government continues to perform poorly.

Sky News’ deputy political editor Sam Coates said his sources – a member of the government and a prominent politician – have “put Sir Keir Starmer on notice”.

Both warned that, if Labour performs badly in next May’s elections across Wales, Scotland and London, it could mark the end of his time in Downing Street.

Coates added: “The level of unhappiness and despair in parts of the Labour Party is so striking that right now, on the first anniversary, I am hearing from ministers in government that Starmer might have to go in months.”

Reform UK is surging in the polls in Wales, while Labour faces a threat from left-wing parties such as the Greens in London.

It comes as the prime minister made it clear that Rachel Reeves has his “complete support” as chancellor and remains integral to his project, Sky News’s political editor Beth Rigby understands.

She looked visibly upset during Prime Minister’s Questions, with a spokesperson claiming she had been affected by a “personal matter”.

A day earlier, Sir Keir’s controversial welfare bill was passed despite a sizeable rebellion from Labour MPs, with major U-turns meaning a new £5bn black hole has appeared in the country’s finances.

One senior figure told Rigby that the pair were as “as close politically” as any chancellor and prime minister have ever been.

“She is going absolutely nowhere,” they added.

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Welfare vote ‘a blow to the prime minister’

Ms Reeves’s tears sent markets spiralling, with the value of the pound and long-term government bonds falling sharply.

Later in the day Sir Keir, said Ms Reeves will be chancellor for a “very long time to come”.

The prime minister said it was “absolutely wrong” to suggest her tearful appearance in the Commons related to the welfare U-turn.

“It’s got nothing to do with politics, nothing to do with what’s happened this week. It was a personal matter for her,” he said while speaking to the BBC’s podcast Political Thinking with Nick Robinson.

“I’m not going to intrude on her privacy by talking to you about that. It is a personal matter.”

Read more from Sky News:
Just 25% of public think Starmer will win next election
Analysis: Emotional Reeves a reminder of tough decisions ahead

Asked if she will remain in post, he said: “She will be chancellor by the time this is broadcast, she will be chancellor for a very long time to come, because this project that we’ve been working on to change the Labour party, to win the election, change the country, that is a project which the chancellor and I’ve been working on together.”

He said Ms Reeves has done a “fantastic job” and added: “She and I work together, we think together. In the past, there have been examples – I won’t give any specific – of chancellors and prime ministers who weren’t in lockstep. We’re in lockstep.”

Wes Streeting, the health secretary, also offered a strong defence for the prime minister and chancellor.

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Health Secretary: Reeves is ‘resilient’

He told Sky News this morning that Sir Keir has been “consistently underestimated” and was “of course” safe as prime minister.

And he said Ms Reeves was a “tough character” who was ” resilient” and “here to stay”.

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Greater Manchester Police investigating grooming cases with more than 700 victims

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Greater Manchester Police investigating grooming cases with more than 700 victims

Despite making “significant improvements”, Greater Manchester Police (GMP) has lost the “trust and confidence” of some victims of grooming gangs, according to a report by the police watchdog.

Michelle Skeer, His Majesty’s Inspector of Constabulary, said that since 2019, when GMP started to review its non-recent child sexual exploitation investigations, “the force has improved its understanding and approach to investigating allegations of child criminal and sexual exploitation”.

The document, published today, said police have live investigations into “multi-victim, multi-offender” child sexual exploitation inquiries, involving 714 victims and survivors, and 1,099 suspects.

Grooming gangs scandal timeline

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‘Our chance for justice’

But despite recording improvements, a report by His Majesty’s Inspectorate of Constabulary and Fire & Rescue Services (HMICFRS) also identified:

• Various training gaps within the investigation team
• Lack of consistency in evaluating case files between social care, health and police
• Failures to initially support victims meant they had “lost trust and confidence” in police

The report was commissioned by the Mayor of Greater Manchester Andy Burnham in 2024 to evaluate whether police, councils and health services can protect children from sexual exploitation in the future.

More on Andy Burnham

Its release comes days after Sir Keir Starmer announced he was launching a new national inquiry into grooming gangs after previously arguing one was not necessary,

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Starmer to launch new grooming gang inquiry

The findings were issued as the final part of the CSE (child sexual exploitation) Assurance Review process which started in 2017. The first three reports examined non-recent child sexual exploitation in Manchester, Oldham and Rochdale.

Mr Skeer said that the force has been trying to improve its service to those who have experienced sexual exploitation, but previous failings have badly affected trust in GMP.

He said: “For some, trust and confidence in the police had been lost, and the force would not be able to rectify their experiences.

“It is vital that improvements are led by victims’ experiences, and if they do come forward, they are supported, protected and taken seriously.”

A recent report by Baroness Casey found a significant over-representation of Asian men who are suspects in grooming gangs in Greater Manchester, adding though authorities are in “denial” more needs to be done to understand why this is the case.

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Teen caught in child sex exploitation

Inspectors also said there were “training gaps” in some investigation teams and issues with data sharing, with local councils sometimes not willing to provide detectives with information, leading to “significant delays in investigations” into grooming gangs.

It cites problems with intelligence provided by Manchester City Council, which took months to arrive and “was so heavily redacted that some pages contained only a few words”, the report said.

Read more from Sky News:
Analysis: Badenoch’s grooming gangs outrage
Grooming survivor wants apology from Starmer

GMP is the only force in the country to set up a dedicated team to investigate grooming gangs. Called the Child Sexual Exploitation Major Investigation Team (CSE MIT) it has about 100 staff and a ringfenced budget.

In October 2024, the force told inspectors there were 59 live multi-victim, multi-offender child sexual exploitation investigations, of which 13 were being managed by the CSE MIT.

The report adds: “The force fully accepts that it made mistakes in the past.

“It has taken positive and effective steps to learn from these mistakes and improve how it investigates recent and non-recent child sexual exploitation.”

Separately, the Baird Inquiry published in July 2024 found officers at GMP were abusing their power – making unlawful arrests, unlawful and demeaning strip searches, sometimes treating victims as perpetrators, and traumatising those who have suffered sexual abuse or domestic violence.

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Wes Streeting defends chancellor and PM ahead of ‘seismic’ 10-year plan for NHS

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Wes Streeting defends chancellor and PM ahead of 'seismic' 10-year plan for NHS

The health secretary has offered a strong defence of the prime minister and chancellor – ahead of Sir Keir Starmer setting out his 10-year vision for the NHS.

PM ‘might have to go in months’ – politics latest

Wes Streeting dismissed suggestions the prime minister could be forced out in months following the toughest week of his premiership yet, and described Rachel Reeves as “resilient” and would “bounce back” following her tearful appearance in the Commons on Wednesday.

Overnight, two senior sources – a member of the government and a prominent politician – told Sky News’ deputy political editor Sam Coates that they had “put Sir Keir Starmer on notice”.

The health secretary, who was speaking as Sir Keir prepares to set out his 10-year vision for the NHS, said the prime minister had been “consistently underestimated”.

Asked by Kamali Melbourne on Sky News Breakfast whether Sir Keir was “safe”, Mr Streeting said: “Of course.

“Keir Starmer has been consistently underestimated. I wonder when people will learn.

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Reeves has ‘complete support’

“They said he couldn’t win the Labour leadership, but he did. They said he couldn’t change the Labour Party, but he did.

“They said he couldn’t take the Labour Party from its worst defeat since the 1930s to election victory last year. And he did and now the cynics say he can’t change the country, but he will.”

As for Ms Reeves – whose tearful appearance in the Commons spooked markets after the prime minister initially failed to back her, Mr Streeting said the chancellor was a “tough character” who was “resilient and she will bounce back”.

The health secretary declined to expand on why Ms Reeves was in the chamber at all yesterday, repeating that it was a personal matter.

“Rachel Reeves as chancellor is here to stay,” he continued.

“We need her to get the economy from strength to strength, to make sure that family finances are in better health than we were when we came into office.”

Speculation about the futures of the two most senior members of the government threaten to overshadow the announcement today, which the government says is “one of the most seismic shifts” in the health service’s history.

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Why has Starmer axed NHS England?

Sir Keir will pledge three main facets of the plan: moving care into the community, digitising the NHS, and a focus on sickness prevention.

The prime minister will announce neighbourhood health services will be rolled out across England to improve access to the NHS and to shift care out of overstrained hospitals.

Sir Keir has already promised thousands more GPs will be trained, and to end the 8am “scramble” for an appointment.

He also previously said his government will bring the NHS into the digital age, with “groundbreaking” new tools to support GPs rolled out over the next two years – including AI to take notes, draft letters and enter data.

And he will promise new contracts that will encourage and allow GP practices to cover a wider geographical area, so small practices will get more support.

Unite, one of the UK’s largest healthcare unions, welcomed the plan cautiously but said staff need to be the focus to ensure people are better looked after.

Read more:
Hundreds of NHS quangos to be axed

How pilot scheme from Brazil is helping NHS

‘Reform or die’

Sir Keir said: “The NHS should be there for everyone, whenever they need it.

“But we inherited a health system in crisis, addicted to a sticking plaster approach, and unable to face up to the challenges we face now, let alone in the future.

“That ends now. Because it’s reform or die.”

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Do you want AI listening in on chats with your doctor?

Neighbourhood health services

The newly announced neighbourhood health services will provide “pioneering teams” in local communities, so patients can more conveniently access a full range of healthcare services close to home.

Local areas will be encouraged to trial innovative schemes like community outreach door-to-door to detect early signs of illness and reduce pressure on GPs and A&E.

The aim is to eventually have new health centres open 12 hours a day, six days a week to offer GP services as well as diagnostics, post-operative care and rehab.

They will also offer services like debt advice, employment support, stop smoking help or weight management.

More NHS dentists

Dentists will also be part of the plan, with dental care professionals part of the neighbourhood teams.

Dental “therapists” will carry out check-ups, treatments and referrals, while dental nurses could give education and advice to parents or work with schools and community groups.

Newly qualified dentists will be required to practice in the NHS for a minimum period, which they have said will be three years.

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