TY - JOUR
T1 - Effect of laughter yoga on salivary cortisol and dehydroepiandrosterone among healthy university students
T2 - A randomized controlled trial
AU - Fujisawa, Akiko
AU - Ota, Atsuhiko
AU - Matsunaga, Masaaki
AU - Li, Yuanying
AU - Kakizaki, Masako
AU - Naito, Hisao
AU - Yatsuya, Hiroshi
N1 - Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/8
Y1 - 2018/8
N2 - 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).
AB - 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).
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U2 - 10.1016/j.ctcp.2018.04.005
DO - 10.1016/j.ctcp.2018.04.005
M3 - Article
C2 - 30057059
AN - SCOPUS:85046012179
SN - 1744-3881
VL - 32
SP - 6
EP - 11
JO - Complementary Therapies in Clinical Practice
JF - Complementary Therapies in Clinical Practice
ER -