College students, particularly female students, often suffer from severe stress and poor sleep. Aromatherapy yoga has become a popular exercise in recent years and may help reduce stress and improve sleep quality, although empirical evidence is limited. We investigated the effective-ness of aromatherapy yoga intervention in reducing stress and improving sleep quality among female college students. Eighty-nine participants (44 in the experimental group [aromatherapy yoga] and 45 in the control group [yoga]), with an average age of 19.88 ± 1.13 years, were en-rolled in this quasi-experimental study. Interventions were performed in the respective groups once a week for 12 weeks, for 90 minutes each time. The Wilcoxon signed-rank test and Mann-Whitney U test (including effect size) were used to test the differences in stress reduction and sleep quality before and after the intervention.

Inclusion Criteria:

• We included female college students aged > 18 years, who were able to understand the questionnaire.

Exclusion Criteria:

• We excluded male students, those with a history of respiratory disease, asthma, or allergy to flowers, plants, or essential oils, those who worked at night, and those with a history of mental diseases.