Abstract
This study focuses on developing a simulation model using MATLAB Multibody tools to analyze the biomechanical effects of different strength training exercises on the musculoskeletal system. Unlike previous models that typically analyze single exercises or specific body regions, this model includes 45 segments and 44 joints when considering the fingers, with a total of 51 degrees of freedom. Basic exercises like dumbbell curl, dumbbell fly, pull up, push up, dumbbell bench press, and dumbbell back squat were simulated using this model. By analyzing motion data, the study calculated joint moments in shoulder, elbow, hip, knee, and ankle joints, along with muscle forces in the biceps brachii. Comparisons with existing literature confirmed the utility of the model. Its flexible structure allows for dynamic analysis of various exercise movements and daily activities such as sit-to-stand, climbing steps, and walking. The model also holds potential for assessing rehabilitation processes by examining how recommended programs affect joint biomechanics, and for distinguishing biomechanical differences between patients and healthy individuals. Overall, it provides a robust framework for studying the impact of exercises on joint biomechanics and has wide-ranging applications in both research and practical settings.