The effect of laughter yoga on well-being, perceived stress, and academic self-efficacy in nursing students: A randomized controlled trial.

Despite rigorous theoretical and clinical training, nursing students face emotional and academic challenges that can harm their well-being. Nonetheless, there is a dearth of research investigating the impact of laughter yoga (LY) on nursing students' well-being, perceived stress, and self-efficacy. The aim of this single-blinded, two-armed randomized controlled trial is to evaluate the effect of LY on nursing students' well-being, perceived stress, and academic self-efficacy (ASE). A total of five sessions of LY were applied to the intervention group. The analysis included a total of 83 nursing students (intervention group n = 41 and control group n = 42). Repeated-measures multivariate analysis of variance (MANOVA) and paired-samples t-test were used for data analysis. Results revealed that the intervention group showed a significant increase in well-being (p < .001) and a decrease in perceived stress after LY (p < .01). However, statistically significant differences between the intervention and control groups were not found in well-being, perceived stress, and ASE (p > .05). These results indicate the potential effects of LY on the students' well-being and perceived stress. Community mental health nurses and educators can use LY to improve well-being in universities.

The impact of laughter yoga as a NIC on health parameters in nurses and nursing students: a systematic review.

BACKGROUND: Laughter yoga is a laughter exercise that combines yoga and breathing exercises (Pranayama). Laughter yoga decreases stress and burnout levels, depression and anxiety, salivary cortisol levels. The aim of the research is to systematically examine the studies on the effect of laughter yoga on health parameters in nurses and nursing students. METHODS: Systematic review of RCTs and quasi-experimental studies. The PRISMA protocol was used as the basis for the conduct of the study. Google Scholar, Medline/PubMed, Cochrane Library, Science Direct, CINAHL Complete and OVID databases were used for study search. Inclusion criteria was based on PICOS. The quality of the studies was assessed using the Joanna Briggs Institute-Meta analysis Statistical Assessment and Review Instrument (JBI-MAStARI). 10 studies were included in the systematic review after those excluded due to reasons not meeting the inclusion criteria. RESULTS: It was determined that the sample size was 50 or more in 80% of the studies. It was determined that the maximum number of laughter yoga sessions was 24 and at least 5 sessions. It has been observed that stress levels evaluated with different measurement tools decrease with the effect of laughter yoga in four studies. In three studies it was found that the level of burnout decreased after laughter yoga. In two studies in which salivary cortisol levels were evaluated also showed that laughter yoga reduced cortisol levels. CONCLUSIONS: It was concluded that stress and burnout levels, depression and anxiety, salivary cortisol levels decreased especially after laughter yoga. In addition, it was concluded that laughter yoga had positive effects on psychological well-being, life satisfaction, subjective happiness increase in and general health in the groups where laughter yoga was practiced.

The effect of laughter yoga and music intervention on depression, anxiety, and stress in the Rafsanjan-Iran aged: a randomized clinical trial study.

OBJECTIVES: This study aimed to compare the effects of laughter yoga and music intervention on depression, anxiety, and stress in aged individuals referred to Rafsanjan health centers. METHOD: In this 3-arm randomized clinical trial, 91 depressed aged participants aged 60-75 years, referred to Rafsanjan health centers, were randomly assigned to intervention and control groups. The study followed a parallel group design with an allocation ratio of 1:1. The laughter yoga intervention was conducted twice a week for eight weeks, and music intervention consisted of 30-min sessions twice a week for eight weeks. The control group received no intervention ('No treatment' concurrent control). Assessments for depressive symptoms (primary outcome), anxiety, and stress were conducted at baseline, post-intervention, and one month after the intervention. RESULTS: A total of 84 patients were analyzed in three groups included the laughter yoga intervention (n = 31), music intervention (n = 25), or control group (n = 28). Repeated measures ANOVA revealed a significant decrease in depressive and anxiety symptoms (p < 0.001) from pre-test to post-test and one-month follow-ups. The greatest impact of the intervention programs on stress was observed immediately after the intervention, but stress increased one month after the intervention programs (p = 0.125). CONCLUSION: Both laughter yoga and music interventions proved effective in improving depression, anxiety, and stress in aged individuals. However, laughter yoga intervention demonstrated a superior effect and better acceptance among elders.

Effectiveness of yoga and laughter yoga in improving psychological resilience of mothers with babies hospitalized in neonatal intensive care unit.

This randomized controlled study aimed to determine the effectiveness of yoga and laughter yoga approaches in enhancing psychological resilience of mothers with babies hospitalized in the neonatal intensive care unit. The Mothers were randomized into three groups as yoga, laughter yoga, and control groups. The mothers received a total of 10 yoga/laughter yoga sessions for 45 minutes twice a week as home-based exercises. Depression, anxiety, stress, and psychological resilience outcomes were evaluated at baseline and after 5th and 10th sessions. The study was completed with 60 mothers including 20 mothers in the yoga group, 19 mothers in the laughter yoga group, and 21 mothers in the control group. There were statistically significant differences between the groups in terms of depression, anxiety, stress, and psychological resilience after 5th and 10th sessions. Yoga and laughter yoga was effective for increasing psychological resilience and alleviating depression, anxiety, stress.

Efficacy and Safety of Laughter Yoga in Cancer Patients: A Scoping Review of Randomized Controlled Trials.

The use of laughter yoga as a complementary and alternative medicine (CAM) strategy has recently gained interest as a potential supportive intervention for cancer patients. In this review, we aimed to assess the impact of laughter yoga on the quality of life of cancer patients, with a focus on evidence from randomized controlled trials (RCTs). Our analysis indicates that laughter yoga can significantly improve the quality of life of cancer patients by improving emotional and physical functioning and reducing symptoms of depression and stress. These findings suggest that laughter yoga is a promising CAM practice for enhancing cancer patients' psychological and physical health. Future research should aim to extend these studies to more extensive and more diverse populations to validate and expand upon these findings.

The Effects of Laughter Yoga on Happiness and Stress in Nursing Students Going into Clinical Practice for the First Time.

Background: There are numerous difficulties that nursing students must overcome in the nursing practice environment. This circumstance mainly impacts the happiness and stress levels of nursing students who lack clinical practice. Aim: In this study aimed to examine the effect of laughter yoga (LY) on nursing students' happiness and stress levels attending to clinical practice for the first-time. Method: In this randomized controlled trial, a totally 50 nursing students were included from a nursing school in Turkey. Data were collected between December 2022-January 2023 via The Happiness Scale and the Perceived Stress Scale for Nursing Students. A total of eight LY lessons for 4 weeks were practiced to the laughter group (LG). Result: The Happiness Scale's means were compared between the groups before and after the intervention, and the results revealed a significant increase (p < 0.05). There was not a significant difference in the stress scale scores between both the groups following LG and clinical practice (t: -1.780; p = 0.081). However, the stress scores of the LG decreased significantly after the LY sessions were completed (b: 3.595; p = 0.001). Conclusion: LY can be an effective method to be used to help increase happiness and reduce the stress of nursing students for first-time entering clinical practice.

A structured laughter yoga therapy program on patients with chemotherapy-induced nausea and vomiting: A randomized clinical trial.

Objetive: Chemotherapy is a prevalent cancer treatment, often accompanied by debilitating side effects such as nausea and vomiting. This study explores the potential effectiveness of laughter yoga, a combination of exercise and voluntary laughter, in alleviating chemotherapy-induced nausea and vomiting. Methods: This two-group randomized clinical trial was conducted on 69 cancer patients undergoing chemotherapy at the Reza Chemotherapy and Oncology Center, Mashhad, Iran, in 2018. Patients were randomly divided into intervention and control groups. Both groups received routine self-care training, with the addition of four 20-min to 30-min laughter yoga sessions held immediately before one of their chemotherapy appointments for the intervention group only. Nausea and vomiting were assessed using the Morrow Assessment of Nausea and Emesis questionnaire at two stages, before and after the intervention. Data were analyzed with Chi-square, Independent-t, Mann-Whitney, Wilcoxon, and McNemar tests using Statistical Package for the Social Sciences (SPSS). Results: The mean age of patients in the intervention group was 49.0 ± 9.6 years, while in the control group, it was 45.2 ± 12.6 years. The intragroup comparison showed a statistically significant decrease in the severity and duration of nausea in the intervention group and a statistically significant increase in the severity and duration of nausea in the control group from pre-test to post-test (P < 0.05). The intergroup comparison showed no statistically significant difference between the two groups in terms of vomiting conditions. Conclusions: Laughter yoga demonstrates promise in improving chemotherapy-induced nausea, suggesting its potential recommendation for managing this distressing side effect. Further research is warranted to explore its broader application in cancer care. Trial registration: This study (No. IRCT20180429039463N1) was registered in the Iranian Registry of Clinical Trials on 21/08/2018.

The Effects of Laughter Yoga on Perceived Stress, Positive Psychological Capital, and Exercise Capacity in Lung Cancer Chemotherapy Patients: A Pilot Randomized Trial.

BACKGROUND: Lung cancer is the malignant tumor with the highest morbidity and mortality rate in China. Although chemotherapy is effective in improving clinical symptoms, it causes a variety of acute and chronic side effects, seriously aggravating the psychological stress of patients. Laughter Yoga as a new type of aerobic exercise can effectively reduce stress levels and increase positive mood in patients. This study aimed to examine the effects of laughter yoga on perceived stress, positive psychological capital, and exercise capacity in lung cancer patients. METHODS: This study was a randomized, single-blind, parallel-group trial. The study enrolled 84 lung cancer chemotherapy patients from a general hospital in central China. These patients were randomly allocated to control and intervention groups (n = 42 per group) after baseline assessments. Patients in the control group received routine care and those in the intervention group received laughter yoga intervention. Perceived stress, positive psychological capital, and exercise capacity were assessed at baseline, immediately post-intervention. RESULTS: During the implementation of the study, there were 2 dropouts in each of the intervention and control groups. Ultimately, 80 patients in the control and intervention groups completed the trial. Patients who received laughter yoga intervention had significantly higher scores in positive psychological capital (P < .01, Cohen's d = 0.692) and exercise capacity (P < .01, Cohen's d = 0.659). Discernible differences were also observed in perceived stress (P < .01, Cohen's d = 1.087) between the 2 groups. CONCLUSIONS: The results of this study suggest that laughter yoga is an effective way and may produce beneficial effects on perceived stress, positive psychological capital and exercise capacity.

Effects of laughter yoga on health-related quality of life in cancer patients undergoing chemotherapy: a randomized clinical trial.

BACKGROUND: Chemotherapy is associated with a wide range of physical and psychological side effects, so complementary and alternative therapies may be practiced as an independent treatment or combined with the standard ones to improve health-related quality of life of cancer patients. Laughter yoga has predominantly been used as a complementary therapy to enhance health and wellbeing of ordinary people and patients with chronic diseases. However, to date, few studies have evaluated the effects of this modern exercise on cancer patients undergoing chemotherapy in clinical settings, to the best of the authors' knowledge. the present study aimed to investigate the effects of Laughter Yoga on the health-related quality of life of cancer patients undergoing chemotherapy. METHODS: This study was a two-group randomized clinical trial on 69 cancer patients undergoing chemotherapy at Reza Radiotherapy and Oncology Center, Iran in 2018. Patients were randomly divided into intervention and control groups. The intervention group received laughter yoga for four sessions at one-week intervals. Each session consists of one part and lasts for 20-30 min. Patients' health-related quality of life was assessed before and after the laughter yoga sessions using Quality of Life Questionnaire European Organization for Research and Treatment of Cancer (EORTC QLQ-C30) version 3.0. SPSS Statistics (v.20 software was used to conduct Chi-square, independent t-test, Mann-Whitney, Wilcoxon and paired t-tests analyses of the data. RESULTS: The number of participants in intervention and control groups were 34 and 35, there was no significant difference of demographic and disease related characteristics and pre-intervention HRQOL between two groups. In the intervention group, there is significant difference between pre- and post-intervention scores (Mean ± Standard Deviation) of emotional functioning (12.99 ± 10.49), physical functioning (0.78 ± 6.08), role functioning (3.43 ± 7.97), fatigue (-8.82 ± 22.01), pain (-8.33 ± 11.78), sleep disturbance (-15.68 ± 18.77), and global health and quality of life (6.37 ± 5.04) (p < 0.05). There was no significant change in the control group. Participants reported no adverse events. CONCLUSIONS: A structured laughter yoga intervention in a hospital setting effectively improved health-related quality of life for cancer patients undergoing chemotherapy. Benefits to many patients could be expected if this would become a part of routine care. TRIAL REGISTRATION: This study was registered in the Iranian Registry of Clinical Trials (no. IRCT20180429039463N1) on 21/08/2018.

The effect of laughter yoga applied before simulation training on state anxiety, perceived stress levels, self-confidence and satisfaction in undergraduate nursing students: A pragmatic randomized controlled trial.

AIM: This study aimed to examine the effect of laughter yoga applied before simulation training on state anxiety, perceived stress levels, self-confidence and satisfaction in undergraduate nursing students. BACKGROUND: Clinical simulation-based teaching implied a revolution in nursing education. Along with the many opportunities that simulation offers, some disadvantages, such as anxiety and stress experienced during simulation scenarios, could affect students' satisfaction and self-confidence in learning. Therefore, laughter yoga could be an alternative method that reduces students' anxiety and stress levels and increases their self-confidence and satisfaction with simulation training. DESIGN: The study was designed as a pragmatic randomized controlled trial. SETTING: This study was conducted at a university in Turkey. PARTICIPANTS: A total of 88 undergraduate nursing students were randomized to the intervention group (n = 44) or control group (n = 44). METHODS: The intervention group participated in the laughter yoga sessions just before the clinical simulation scenario, while the control group only performed the simulation training. The researchers examined the effect of laughter yoga on state anxiety, perceived stress levels, self-confidence and satisfaction in learning before and after the intervention. Data were collected between January - February 2022. RESULTS: This study showed that the mean scores of state anxiety, perceived stress, mean pulse rate and arterial pressure of the intervention group were significantly lower than those of the control group (p < 0.05). In addition, there was also a significant group*time interaction between the groups on state anxiety, perceived stress, pulse, respiratory and mean arterial pressure scores (p < 0.05). Moreover, the mean scores of student satisfaction and self-confidence in the learning of the intervention group were significantly higher than those of the control group (p < 0.05). CONCLUSION: The findings showed that laughter yoga helped nursing students reduce their state anxiety and perceived stress levels related to simulation training and improved their self-confidence and satisfaction with learning. Additionally, it enhanced the students' vital signs (including mean pulse rate and mean arterial pressure). These positive results are promising for using LY as an easy, safe and effective method to reduce undergraduate nursing students' stress and anxiety levels and to improve their learning satisfaction and self-confidence levels in clinical skills training such as simulation training.

Laughter yoga as an enjoyable therapeutic approach for glycemic control in individuals with type 2 diabetes: A randomized controlled trial.

Background: Laughter has been reported to have various health benefits. However, data on the long-term effects of laughter interventions on diabetes are limited. This study aimed to investigate whether laughter yoga can improve glycemic control among individuals with type 2 diabetes. Methods: In a single-center, randomized controlled trial, 42 participants with type 2 diabetes were randomly assigned to either the intervention or the control group. The intervention consisted of a 12-week laughter yoga program. Hemoglobin A1c (HbA1c), body weight, waist circumference, psychological factors, and sleep duration were evaluated at baseline and week 12. Results: Intention-to-treat analysis showed that participants in the laughter yoga group experienced significant improvements in HbA1c levels (between-group difference: -0.31%; 95% CI -0.54, -0.09) and positive affect scores (between-group difference: 0.62 points; 95% CI 0.003, 1.23). Sleep duration tended to increase in the laughter yoga group with a between-group difference of 0.4 hours (95% CI -0.05, 0.86; P = 0.080). The mean attendance rate for laughter yoga program was high (92.9%). Conclusions: A 12-week laughter yoga program is feasible for individuals with type 2 diabetes and improves glycemic control. These findings suggest that having fun could be a self-care intervention. Further studies with larger numbers of participants are warranted to better evaluate the effects of laughter yoga. Clinical trial registration: http://www.chinadrugtrials.org.cn, identifier UMIN000047164.

The effect of laughter yoga on perceived stress, burnout, and life satisfaction in nurses during the pandemic: A randomized controlled trial.

BACKGROUND: A randomized controlled study was conducted on the effects of laughter yoga in reducing the perceived stress and burnout levels in nurses during the pandemic and in increasing their life satisfaction. MATERIALS AND METHODS: The study was conducted with 101 (51 in the experimental group, and 50 in the control group) nurses providing care for patients with COVID-19. A total of eight sessions of laughter yoga were applied to the nurses in the experimental group for four weeks, twice a week. The Introductory Information Form, Perceived Stress Scale, Maslach Burnout Inventory, and Life Satisfaction Scale were used during data collection. RESULTS: The difference between the pre- and posttest Perceived Stress Scale, Maslach Burnout Inventory, and Life Satisfaction Scale score averages of the nurses in the experimental group were found to be statistically significant (p < 0.05), whereas the difference between the pre- and posttest score averages of the nurses in the control group was not significant (p > 0.05). CONCLUSION: Laughter yoga is an effective method to reduce perceived stress and burnout while also increasing life satisfaction. GOV ID: NCT05317091.

Effects of a laughter program on body weight and mental health among Japanese people with metabolic syndrome risk factors: a randomized controlled trial.

BACKGROUND: While there have been several intervention studies on the psychological effects of laughter, few have examined both the psychological and physical effects. This study investigates the effects of a laughter program on body weight, body mass index (BMI), subjective stress, depression, and health-related quality of life (HRQOL) among Japanese community-dwelling individuals using a randomized controlled trial with a waitlist. METHODS: Overall, 235 participants (37 men and 198 women) aged 43-79 years (mean 66.9, median 67.0) were randomized into laughter intervention and control groups (n = 117 and n = 118, respectively) to participate in a 12-week laughter program. Body weight, subjective stress, subjective well-being, and HRQOL were measured at the baseline, with a 12-week follow-up. The laughter program intervention's effects on these factors were analyzed using an analysis of covariance adjusted by age, sex, risk factors, medication, and area. Furthermore, Pearson's correlation and a general linear model analyzed the relationship between participants' BMI and psychological index changes. RESULTS: The comprehensive laughter program significantly improved the mean body weight (p = 0.008), BMI (p = 0.006), subjective stress (p = 0.004), subjective well-being (p = 0.002), optimism (p = 0.03), and physical component summary (PCS) scores of HRQOL (p = 0.04). A similar tendency occurred for the mean changes in BMI and subjective stress score by area, sex, and age. Moreover, there was a significant and negative correlation between the change in BMI and PCS change (p = 0.04). CONCLUSION: The comprehensive 12-week laughter intervention program, mainly comprising laughter yoga, significantly improved physical and psychological functions such as body weight, BMI, subjective stress, subjective well-being, and HRQOL among predominantly elderly Japanese community-dwelling individuals with metabolic syndrome risk factors. Moreover, PCS improved among participants who reduced BMI after the intervention. These results suggest that the laughter program may help reduce body weight in participants with metabolic syndrome risk factors by reducing stress and improving HRQOL and mental health factors, such as subjective well-being and optimism. TRIAL REGISTRATION: Registered with the University Hospital Medical Information Network Clinical Trials Registry UMIN-CTR000027145 on 27/04/2017.

The impact of laughter yoga on depression and anxiety among retired women: a randomized controlled clinical trial.

Recently, laughter yoga (LY) has been introduced for managing depression and anxiety. This study aimed to investigate the impact of LY on depression and anxiety among retired women in city of Bojnurd, Iran, 2018. Sixty-six retired women were randomly assigned to intervention and control groups. Intervention group received LY twice weekly for 8 weeks; control group had their routine daily activities. Depression and anxiety levels were measured at study initiation, week 4, and week 8 in both groups. Results showed significant difference in the pattern of depression (p <.001) and anxiety (p <.001) scores within and between groups. LY could be an effective intervention in reducing depression and anxiety among retired women.

Effects of laughter yoga on hemodialysis patients' plasma-beta endorphin levels, pain levels and sleep quality: A randomized controlled trial.

This study evaluates the effects of "laughter yoga" on the plasma beta-endorphin levels, pain levels and sleep quality of hemodialysis patients. It is a randomized controlled trial. The study was carried out between July and October 2018. A total of 68 patients receiving hemodialysis treatment at two different dialysis centers were included in the study. The duration of the laughter yoga was 30 min, and a total of 16 sessions were performed on a twice-weekly basis. The data were collected by using a socio-demographic information form, the Visual Analog Scale and the Pittsburgh Sleep Quality Index, and blood samples were collected to determine beta-endorphin levels. Following the laughter yoga implementation, the pain level of the intervention group patients significantly decreased, and their sleep quality significantly improved. No significant change occurred in the patients' beta-endorphin levels. Laughter yoga was effective in reducing pain and increasing sleep quality.

Effect of laughter yoga on mental symptoms and salivary cortisol levels in first-year nursing students: A randomized controlled trial.

BACKGROUND: University students are faced with several stress factors affecting their mental health. Therefore, the first year at university is a period that calls for careful attention and research. AIM: The aim of this study is to evaluate the effect of laughter yoga on mental symptoms and cortisol levels in nursing students. METHODS: This study is a randomized controlled study employing a pre-/post-test design with a control group. A total of 75 healthy university students were assigned to the intervention group and control group. The Brief Symptom Inventory was applied to both groups before Session 1 and after Session 8. Saliva samples were taken from the students to measure their cortisol levels before and after each session. RESULTS: Evaluation of the mean scores obtained from the Brief Symptom Inventory before and after the intervention showed a significant decrease in the scores between groups (P < 0.05). In three out of the eight sessions, there was a significant decrease in the intervention group compared with the control group regarding the mean values of pre-test and post-test salivary cortisol levels (P < 0.05). CONCLUSION: Laughter yoga can provide an effective means to help first-year nursing students cope with stress and reduce mental symptoms.

Laughter yoga reduces the cortisol response to acute stress in healthy individuals.

Stress is one of the foremost contributors to the development of psychiatric diseases. Since the prevalence of stress-related complaints is increasing, we are in need for affordable and effective treatment alternatives. Laughter yoga (LY), a popular method encouraging participants to simulate laughter and participate in yogic breathing exercises, is hypothesized to buffer negative effects of stress. Although widely practiced, empirical evidence for beneficial effects of LY is scarce. We investigated the acute effects of a single 30-min LY session on the autonomic, endocrine and psychological response to a standardized psychosocial stressor. Thirty-five healthy subjects (51% female) were randomly assigned to experience either a LY (n = 11), a relaxation breathing (n = 12) or a (non-intervention) control (n = 12) session prior to their exposure to the Trier Social Stress Test for Groups (TSST-G). Salivary cortisol, salivary alpha amylase, and subjective stress were assessed repeatedly throughout the experiment. We expected that LY and relaxation breathing group each show a downregulation of stress response indices compared to the control group. Further, we expected that LY has beneficial effects compared to relaxation breathing. The groups did not differ in salivary cortisol, alpha amylase or subjective stress reactivity during the 30-min intervention. However, in response to the TSST-G, the LY, but neither the relaxation breathing, nor the control condition, showed an attenuated cortisol stress response. These findings highlight the potential of LY to buffer the endocrine stress response. Therefore, LY could be used as a cheap and easily-to-implement add-on to more traditional stress interventions. LAY SUMMARY In recent years, more and more people have reported to feel stressed. Although our body is well equipped to deal with acute stress, chronic stress can tire our system and contribute to illness in the long run. Therefore, we need affordable and effective measures to reduce stress. In this study we have investigated whether a single laughter yoga session can help us to deal with acute stress. Although laughter yoga did not change how stressful a situation was perceived, it reduced the amount of stress hormones that were released in response to the situation. As such, laughter yoga might be a cheap and easily-to-implement add-on to more traditional stress reduction interventions.

Comparison of Laughter Yoga and Anti-Anxiety Medication on Anxiety and Gastrointestinal Symptoms of Patients with Irritable Bowel Syndrome.

BACKGROUND Irritable bowel syndrome (IBS) is the most common chronic gastrointestinal (GI) disorder. Patients with IBS usually suffer from anxiety and depression. A combination of psychological approaches and pharmacological treatments can be a significantly effective treatment for IBS. The main objective of the present study was to provide a therapeutic plan based on laughter yoga and anti-anxiety medication, employed for the very first time, and to determine the effectiveness of these treatments on the anxiety and GI symptoms of patients with IBS. METHODS In this randomized, controlled, clinical trial, the participants were 60 patients selected from those who referred to the GI clinic of Vali-asr Hospital (Birjand, Iran) during the study period (April 2017 to March 2017) and were diagnosed as having IBS based on ROME III criteria. The participants were randomly assigned to either the laughter yoga group, the anti-anxiety medication group, or the symptomatic treatment (control) group. Severity levels of anxiety and GI symptoms before and after intervention were determined and compared among these three groups according to approved protocols. RESULTS The severity of IBS symptoms after the interventions was more greatly reduced in the laughter yoga group than in the anti-anxiety medication and control groups (p = 0.006). The severity of anxiety after interventions decreased in all three groups, especially in the yoga treatment group, but the difference was not statistically significant (p = 0.1). CONCLUSION Laughter yoga is more effective than anti-anxiety medication in reducing the GI symptoms of patients with IBS. Therefore, applying laughter yoga along with common pharmacological therapies for patients with IBS might be strongly advised.

Psychological and physiological effects of laughter yoga sessions in Japan: A pilot study.

The purpose of this pilot study was to examine and evaluate the psychological and physiological effects of multiple sessions of laughter yoga on community members. Participants took part in a 45 min laughter yoga session once per month for 6 months. Before and after all sessions, participants completed the Profile of Mood States-Brief Japanese Version (J-POMS-B) questionnaire to assess their mood, and had blood drawn for the measurement of stress indicators and immune function. Serial changes in J-POMS-B scores were tested by three way analysis of variance, and changes in laboratory results per session were evaluated with a paired t-test. The results showed that repeated sessions of laughter yoga had psychologically beneficial effects, especially on the aspects of tension-anxiety, and vigor. Adrenocorticotropic hormone and cortisol values related to the participants' stress levels were significantly decreased after the fourth laughter yoga session. These results indicated that multiple laughter yoga sessions appeared to be effective in improving the psychological and physiological status of healthy adults.

Effect of laughter yoga on salivary cortisol and dehydroepiandrosterone among healthy university students: A randomized controlled trial.

OBJECTIVE: To examine whether laughter yoga (LY), i.e., simulated laughter, alters cortisol and dehydroepiandrosterone (DHEA) levels and cortisol/DHEA (C/D) ratios. METHODS: In a randomized controlled trial, 120 healthy university students were allocated to experiencing LY, watching a comedy movie (spontaneous laughter), or reading a book. Salivary cortisol and DHEA levels were measured immediately before, immediately after, and 30 min after the intervention. RESULTS: Cortisol levels and C/D ratios significantly decreased by time in the LY and comedy movie groups. Significant group*time interactions were found between these two groups for cortisol levels and C/D ratios. DHEA levels did not change by time in the LY group. CONCLUSIONS: LY decreased cortisol levels and C/D ratios but did not affect DHEA levels. Simulated and spontaneous laughter differently affected the dynamics of cortisol levels and C/D ratios. Effect of spontaneous laughter on the cortisol dynamics lasted longer than that of simulated laughter. (UMIN000019409).