Effects of Behavior Change Techniques on Physical Activity, Sedentary Behavior, and Muscle Strength among Male University Students

University students often struggle to stay physically active, facing high levels of sedentary behavior and weak muscle strength. Behavior change techniques have proven effective in promoting physical activity and enhancing overall health in this group. This study aimed to examine the impact of behavior-change technique-based interventions on physical activity, sedentary behavior, and muscle strength among male university students. A pre-post study design was used with 100 students. Participants underwent an 8-week intervention incorporating various behavior change techniques. Physical activity, sedentary behavior, and muscle strength were measured at the start and end of the study through self-reported questionnaires and a dynamometer. Results revealed significant differences in the experimental group before and after the intervention regarding vigorous physical activity (t=2.79, p=0.01), sedentary behavior (t=2.89, p=0.008), knee extensor muscle strength (t=5.66, p<0.001), and knee flexor muscle strength (t=5.65, p<0.001). However, there were no significant changes in moderate physical activity (t=3.14, p<0.001) or daily step count (t=0.34, p=0.73). The control group showed no significant differences in any variables from pre- to post-intervention. An intervention based on behavior-change techniques effectively increased physical activity, reduced sedentary behavior, and improved muscle strength among male university students. These findings suggest that incorporating targeted behavior change strategies into physical activity programs could be a promising approach to fostering healthier lifestyles and boosting overall well-being among this population. Future studies should explore the long-term sustainability of these behavioral changes and identify factors that may influence their success.