Aims: As COVID-19 occurs suddenly and is highly contagious, it inevitably affects the psychological factors of individuals. Therefore, the aim of this study was to investigate the effect of a Pilates exercise period on the Psychological preparation and affect of young women during the outbreak of Covid-19.

Methods: This research was semi-experimental with pre and post-test design with control group. For this purpose, 50 young women with a mean age of 25± 2 years were randomly selected and divided into experimental and control groups by convenience sampling method from Urmia. The experimental group practiced Pilates online at home for 3 sessions (60 minutes) each week for 8 weeks and the control group did not receive any intervention during this period. Dependent variables were measured using a questionnaire of Psychological preparation and positive and negative affect. Data analysis was performed using of Multivariate Analysis of covariance (MANCOVA) at a significance level of 0.05.

Results: The results showed that the scores of all components of Psychological preparation and affect of young women in the experimental group were significantly better than the control group, which indicates the effectiveness of Pilates exercises on the relevant variables in this quarantine period.

Conclusion: Therefore, based on the findings of this study, it can be concluded that Pilates improves Psychological preparation and affect of young women, and and maintaining a regular exercise program is a key strategy to maintain mental health during quarantine due to coronavirus outbreak.