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Laughter yoga (Hasyayoga) is a practice involving prolonged voluntary laughter. Laughter yoga is based on the belief that voluntary laughter provides the same physiological and psychological benefits as spontaneous laughter. Laughter yoga is done in groups, with eye contact and playfulness between participants. Forced laughter soon turns into real and contagious laughter. Laughter yoga does not involve humor or comedy.
Laughter yoga was made popular as an exercise routine developed by Indian physician Madan Kataria, who writes about the practice in his book Laugh For No Reason.
In the mid-1990s Laughter Yoga was practiced in the early mornings, primarily by groups of older men in open parks. Later, a more formalized version was created and popularized as "Laughter Clubs". Kataria's first Laughter Yoga Club began on 13 March 1995 in Mumbai; beginning with five people in a local public park, the concept has rapidly spread worldwide. As of 2011, there are more than 8,000 Laughter Clubs in 65 countries. Each club has its own Laugh Captain and operates as an independent cell.
Laughter is easily stimulated in a group when combined with eye contact, 'childlike playfulness' and laughter exercises. Fake laughter quickly becomes real. Laughter Yoga brings more oxygen to the body and brain by incorporating yogic breathing which results in deep diaphragmatic breathing.
Anyone can laugh without needing to rely on humor, jokes or comedy. Laughter is initially simulated as a physical exercise while maintaining eye contact with others in the group and promoting childlike playfulness. In most cases this soon leads to real and contagious laughter. Laughter yoga is the only technique that allows adults to achieve sustained hearty laughter without involving cognitive thought. It bypasses the intellectual systems that normally act as a brake on natural laughter.
Laughter yoga sessions start with gentle warm-up techniques which include stretching, chanting, clapping and body movement. These help break down inhibitions and develop feelings of 'childlike playfulness'. Breathing exercises are used to prepare the lungs for laughter, followed by a series of ‘laughter exercises’ that combine the method of acting and visualization techniques with playfulness. These exercises, when combined with the strong social dynamics of group behavior, lead to prolonged and hearty unconditional laughter. Laughter exercises are interspersed with breathing exercises. Twenty minutes of laughter is sufficient to develop full physiological benefits.
A Laughter Yoga session may finish with "Laughter Meditation." This is a session of unstructured laughter whereby participants sit or lie down and allow natural laughter to flow from within like a fountain. This is a powerful experience that often leads to a healthy emotional catharsis and also a feeling of release and joyfulness that can last for days. This can be followed by guided relaxation exercises.
Scientific validity 
A handful of small-scale scientific studies have indicated that Laughter Yoga may potentially have some medically beneficial effects, including benefits to cardiovasular health and mood. Benefits to mood in depressed patients have been found to be as good as exercise therapy. Further scientific testing of Laughter Yoga is required before any conclusions about its medical usefulness can be drawn.
Some Laughter Yoga practitioners have made claims about the efficacy of Laughter Yoga as a means for helping to treat or reducing risk factors for allergies and asthma, arthritis, diabetes and a variety of other medical conditions. However these claims are usually poorly cited and not properly scientifically tested.
See also 
- Kataria, Madan (2002), Laugh For No Reason (2 ed.), Mumbai, India: Madhuri International, ISBN 978-81-87529-01-9
- What's So Funny? Yoga Journal
- Effect of laughter yoga on mood and heart rate variability in patients awaiting organ transplantation: a pilot study.
- Laughter Yoga versus group exercise program in elderly depressed women: a randomized controlled trial. PubMed.gov, 26 March 2011
- Allergy and Asthma - Laughter Yoga International
- Laughter Yoga and Arthritis - Laughter Yoga International
- Laughter Yoga Checks Diabetes - Laughter Yoga International
- Laughter Yoga for Healing - Laughter Yoga International
Further reading 
- Birklbauer, Walter (2011), Why Laughter Yoga or The Guitar Method: A Neurologic View, ISBN 3-8423-6907-7
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