What is a primary physiological effect of resistance training?

One of the primary physiological effects of resistance training is the increased muscle strength and endurance. This occurs through various mechanisms, including the adaptation of muscle fibers to increased demand and the neuromuscular adaptations that enhance recruitment of motor units. Resistance training leads to hypertrophy of muscle fibers, particularly type II fibers, which are responsible for generating high levels of force. As a result, individuals who engage in a well-structured resistance training program not only see improvements in their maximal strength but also in muscular endurance, enabling them to perform activities at a higher intensity for a longer duration.

While resistance training may produce mixed effects on flexibility, endurance, and cardiovascular health, its most direct and notable benefits relate to strength and muscle endurance. These enhancements are foundational to improving overall physical performance and can also contribute positively to activities of daily living, athletic performance, and injury prevention, showcasing the robust benefits that resistance training offers beyond merely building bulk.