Psychosocial Factors Associated with Physical Activity Level Among Undergraduate Students in a Public University in Malaysia Noor Ahmed Al-hassany 1 , Hazizi Abu Saad 1,2* ,and Zalina Abu Zaid 1 , Nurul Husna Mohd Shukri 1 1 Department of Nutrition and Dietetics, Faculty of Medicine and Health Sciences, University Putra Malaysia, Serdang 43400, Malaysia 2 Sports Academy, University Putra Malaysia, Serdang 43400, Malaysia * Corresponding author:Hazizi Abu Saad hazizi@upm.edu.my Abstract This cross-sectional study aimed to determine the association of psychosocial factors with physical activity levels among undergraduate students aged 18 to 30 years. A sample of 261 students from Universiti Putra Malaysia (n = 261; 138 males; 123 females) participated in the study. The respondents have been selected through a probability-based cluster sampling. A self-administered questionnaire was used to gather information regarding the socio-demographic characteristics(age, ethnicity, family household number, allowance income, and parent’s monthly income), psychosocial factors (self-efficacy, social support, and perceived benefit), and physical activity levels, which was accessed using Global Physical Activity Questionnaire (GPAQ). Multiple linear regression analysis was performed to determine factors associated with physical activity levels. The highest percentage of respondents (63.2%) were classified as having a moderate physical activity, followed by vigorous (24.9%)and low physical activity (11.9%). The findings of multiple linear regression revealed that self-efficacy (Beta = 0.137, p = 0.049) and physical performance (Beta = 0.193, p = 0.002) were significant predictors of physical activity levels. Therefore, enhancements in self-efficacy and positive perception toward having better physical performance could be used as a strategy to increase physical activity levels among students in the university. Keywords:Physical activity; Psychosocial, Self-efficacy; Social support; Perceived benefit. 1. Introduction Physical activity (PA) is defined as “any bodily movement that involves skeletal muscle contraction which causesenergy expenditure”[1]. A global statistic by the World Health Organization reported that the prevalence of insufficient physical activity was 23% for men and 32 % for women aged above 18 years[2]. The World Health Organization (2012) also found that Malaysia is among the countries with the highest level (61.5%) of physical inactivity among people aged 15 and over [3]. Journal of University of Shanghai for Science and Technology ISSN: 1007-6735 Volume 22, Issue 12, December - 2020 Page-265