While often dismissed as a mere byproduct of entertainment, laughter plays a measurable role in supporting health. Research has demonstrated that laughter can influence hormonal balance, cardiovascular function, immune response, and psychological well-being (Kramer et al., 2023; Dunbar et al., 2012). These effects make laughter a relevant and accessible strategy for self-care, requiring minimal cost and effort.
Laughter and Stress Hormone Reduction
Chronic stress elevates cortisol levels, which are associated with increased risk of anxiety, cardiovascular disease, and immune suppression. A systematic review and meta-analysis by Kramer et al. (2023) found that spontaneous laughter was linked to significant reductions in cortisol compared to control conditions. Additionally, laughter has been shown to reduce epinephrine levels, promoting a relaxation response (Kramer et al., 2023).
Practical Application: Incorporating short, intentional “laughter breaks” into daily routines—such as watching a brief comedic video—can provide measurable reductions in stress hormones.
Endorphin Release and Pain Tolerance
Laughter stimulates the release of endorphins, chemicals that promote feelings of well-being and increase pain tolerance. In a series of experiments, Dunbar et al. (2012) demonstrated that participants who engaged in social laughter experienced higher pain thresholds compared to those in control groups. The effect was independent of mood changes, indicating a direct physiological mechanism.
Practical Application: Using humor before engaging in physically demanding activities may improve comfort and endurance.
Cardiovascular Benefits of Laughter
Laughter can also have acute cardiovascular benefits. Sugawara et al. (2010) observed improved endothelial function and arterial compliance after participants watched comedic films. Similarly, Law et al. (2018) found that both simulated and spontaneous laughter produced beneficial changes in heart rate and heart rate variability, suggesting cardiovascular stimulation akin to light exercise.
Practical Application: Brief daily laughter sessions may serve as a complementary practice for supporting cardiovascular health.
Psychological Benefits and Anxiety Reduction
Humor interventions have demonstrated small-to-moderate positive effects on depression, anxiety, and perceived stress (Sarink et al., 2023). Laughter provides a low-risk, low-cost adjunct to conventional psychological therapies, offering immediate mood elevation and stress relief.
Practical Application: Group-based humor activities, such as game nights or comedy viewings, can enhance social bonds and support emotional resilience.
Laughter and Autonomic Recovery
Beyond its immediate effects, laughter also supports faster recovery from stress. Fujiwara et al. (2018) found that hearing laughter increased parasympathetic activity, aiding autonomic nervous system recovery after stressful tasks.
Practical Application: Playing audio clips of laughter after high-stress moments can promote faster physiological recovery.
Conclusion
Laughter is a multifaceted physiological and psychological phenomenon with demonstrable benefits for stress reduction, pain tolerance, cardiovascular health, mood, and autonomic recovery. Given its accessibility, safety, and low cost, laughter should be considered a legitimate component of daily self-care strategies.
References
Dunbar, R. I. M., Baron, R., Frangou, A., Pearce, E., van Leeuwen, E. J., Stow, J., Partridge, G., MacDonald, I., Barra, V., & van Vugt, M. (2012). Social laughter is correlated with an elevated pain threshold. Proceedings of the Royal Society B: Biological Sciences, 279(1731), 1161–1167. https://doi.org/10.1098/rspb.2011.1373
Fujiwara, Y., Toyama, H., & Liu, Q. (2018). Hearing laughter improves the recovery process of the autonomic nervous system after a stress-loading task. BioPsychoSocial Medicine, 12(1), 17. https://doi.org/10.1186/s13030-018-0141-0
Kramer, C. K., Dos Santos, C., & von Mühlen, D. (2023). Laughter as medicine: A systematic review and meta-analysis of interventional studies evaluating the impact of spontaneous laughter on cortisol levels. PLOS ONE, 18(5), e0284769. https://doi.org/10.1371/journal.pone.0284769
Law, M. M., Ahn, J., & Ahn, H. (2018). A comparison of the cardiovascular effects of simulated and spontaneous laughter. Biological Psychology, 135, 8–12. https://doi.org/10.1016/j.biopsycho.2018.03.003
Sarink, F. S. M., Koning, A. M. M., & van der Heijden, M. M. P. (2023). Humor interventions in psychotherapy and their effect on mental health: A literature review. Frontiers in Psychology, 13, 1069366. https://doi.org/10.3389/fpsyg.2022.1069366
Sugawara, J., Tarumi, T., Tanaka, H., & Maeda, S. (2010). Effect of mirthful laughter on vascular function. The American Journal of Cardiology, 106(6), 856–859. https://doi.org/10.1016/j.amjcard.2010.05.021
