This study investigated the impact of three different training regimens--Low-Intensity Steady State (LISS), High-Intensity Interval Training (HIIT), and Random Physical Activity (RPA)--on diverse facets of physical fitness among 144 college students with no prior regular exercise experience. The objective is to assess the effectiveness of these training protocols in improving cardiorespiratory endurance, muscular endurance, and flexibility levels. To evaluate the impact of each training program, both within-group and between-group comparisons are performed. The procedures include a ten-week intervention period for each group, during which fitness evaluations such as the One-minute Push-up Test (OMPUT), Plank Test (PT), Sit-and-Reach Test (SART), and 3-minute Step Test (3MST) are conducted. The statistical analyses include the use of the Kruskal-Wallis test and followed by Tukey-Kramer analysis for comparisons between groups, along with paired t-tests for comparisons within groups. The in-group comparison showed significant improvement in all components for both genders. LISS improved flexibility, cardiorespiratory endurance, and muscular endurance. [ABSTRACT FROM AUTHOR]