The Effect of Laughter Yoga on Loneliness, Anger and Salivary Cortisol Levels in Visually Impaired Individuals

Laughter is an innate, most natural, sincere and universal response to humorous stimuli. Philosophically, it is explained by relief theory, conflict theory and superiority theory (Öztürk \& Tezel, 2021). The emergence of laughter yoga was made by Dr., an Indian medical doctor, in 1995. It was created by combining breathing exercises and unconditional laughter with the work of Madan Kataria and his wife Madhuri Kataria. In laughter yoga, the individual can laugh in a simulated way with the interaction of group members, without a funny situation, joke or joke. The body cannot distinguish between real and unreal laughter, and fake laughter begins to turn into real laughter (Kataria, 2011).