How does resistance training primarily benefit the body?

Resistance training primarily benefits the body by developing muscular strength and endurance. This form of exercise involves various activities that require muscles to exert force against resistance, which can come from free weights, machines, resistance bands, or even body weight. As a result, there is a progressive overload on the muscles that leads to adaptations such as increased muscle size, strength, and endurance over time.

When engaging in resistance training, muscle fibers experience small tears that the body repairs, leading to muscle growth (hypertrophy). This process not only enhances the ability to perform daily activities more effectively but also boosts overall athletic performance. Additionally, increased muscle strength plays a critical role in supporting joint health and can improve balance and stability, thereby reducing the risk of injury.

While resistance training can indirectly improve aspects of flexibility, cardiovascular health, and body composition, its primary focus and the most significant benefits lie in the development of muscular strength and endurance. Thus, option C accurately captures the primary benefit of resistance training.