This study was conducted to investigate the effects of progressive relaxation exercises, performed with the assistance of a therapeutic clown during the pre-operative period, on fear, anxiety and physiological parameters in children. This randomised controlled trial included children aged 6-10 years undergoing circumcision surgery. The children were randomised into three groups: a progressive relaxation exercise group led by a therapeutic clown, a progressive relaxation group led by a nurse, and a control group. Fear, anxiety and physiological parameters (heart rate, respiratory rate, blood pressure, oxygen saturation) were assessed before and after the procedure.

Inclusion Criteria:

• Aged between 6 and 10 years,
• Willing to participate in the study,
• Admitted to the clinic for elective circumcision surgery,
• Accessible prior to surgery,
• With no cognitive impairments,
• With no vision or hearing problems were included in the study.

Exclusion Criteria:

• Children who wished to withdraw from the study during the study period were excluded.