The effects of physical activity on depression and quality of life in Chinese perimenopausal women

Background: Women are more likely to experience depressive symptoms and poor quality of life (QoL) during perimenopause. The effectiveness of physical activity (PA) in perimenopause on mental well-being and health outcomes has been frequently reported. This study aimed to investigate the mediating effect of PA on the relationship between depression and QoL in Chinese perimenopausal women. Methods: A cross-sectional study was performed, and participants were recruited through a multistage, stratified, probability proportional to size sampling method. Depression, PA, and QoL were measured by Zung Self-rating Depression Scale, Physical Activity Rating Scale-3, and World Health Organization Quality of Life Questionnaire. The direct and indirect effects of PA on QoL were analyzed by PA in a mediation framework. Results: 1100 perimenopausal women participated in the study. PA mainly plays partial mediating roles in the relationship between depression and physical (ab = -0.493, 95 % CI: -0.582 to -0.407; ab = -0.449, 95 % CI: -0.553 to -0.343) and psychological (ab = -0.710, 95 % CI: -0.849 to -0.578; ab = -0.721, 95 % CI: -0.853 to -0.589; ab = -0.670, 95 % CI: -0.821 to -0.508) domains of QoL. Additionally, intensity (ab = -0.496, 95 % CI: -0.602 to -0.396; ab = -0.355, 95 % CI: -0.498 to -0.212) and duration (ab = -0.201, 95 % CI: -0.298 to -0.119; ab = -0.134, 95 % CI: -0.237 to -0.047) intermediated the relationship between moderate-to-severe depression and physical domain; frequency (ab = -0.130, 95 % CI: -0.207 to -0.066) only had a mediation influence between moderate depression and physical domain; intensity (ab = -0.583, 95 % CI: -0.712 to -0.460; ab = -0.709, 95 % CI: -0.854 to -0.561; ab = -0.520, 95 % CI: -0.719 to -0.315), duration (ab = -0.433, 95 % CI: -0.559 to -0.311; ab = -0.389, 95 % CI: -0.547 to -0.228; ab = -0.258, 95 % CI: -0.461 to -0.085), and frequency (ab = -0.365, 95 % CI: -0.493 to -0.247; ab = -0.270, 95 % CI: -0.414 to -0.144) all interceded between the psychological domain and all levels of depression, except for the frequency between severe depression and psychological domain; in terms of social relationship and environment domains, intensity (ab = -0.458, 95 % CI: -0.593 to -0.338; ab = -0.582, 95 % CI: -0.724 to -0.445), duration (ab = -0.397, 95 % CI: -0.526 to -0.282; ab = -0.412, 95 % CI: -0.548 to -0.293), and frequency (ab = -0.231, 95 % CI: -0.353 to -0.123; ab = -0.398, 95 % CI: -0.533 to -0.279) were mediators only on mild depression. Limitations: The cross-sectional study and self-reported data are major limiting factors. Conclusion: PA and its components partially mediated the association between depression and QoL. Suitable prevention methods and interventions for PA may improve the QoL for perimenopausal women.