Incorporating resistance training into a workout regime primarily benefits by increasing muscle strength and mass. This training stimulates muscle fibers, leading to adaptations that improve both muscular and metabolic efficiency, enabling individuals to perform daily activities more easily. Additionally, resistance training enhances bone density, reduces body fat, and improves insulin sensitivity, contributing to better overall health. It also promotes functional fitness, allowing individuals to maintain their independence as they age, making it a vital component of a balanced exercise program.