Prolonged resistance training results in which of the following?

Prolonged resistance training is known to lead to significant physiological adaptations in the body. One of the primary outcomes of consistent and progressive resistance training is an increase in lean muscle mass. As individuals engage in strength training, the muscles undergo micro-tears that heal and expand, leading to hypertrophy or growth in muscle size. This process not only increases the volume of lean muscle but also enhances the metabolic rate, which can contribute to a decrease in body fat over time.

By integrating regular resistance exercises into a fitness routine, individuals often experience improved body composition, characterized by an increase in muscle mass relative to fat mass. This change is beneficial as it assists in achieving a healthier body fat percentage and overall improved physical performance. Therefore, the correct choice reflects the well-documented benefits of prolonged resistance training on both lean muscle development and fat reduction. This understanding underscores the importance of resistance training as a key component of fitness programs aimed at improving body composition and enhancing overall health.