How does strength training typically benefit muscle mass?

Strength training primarily benefits muscle mass by promoting muscle hypertrophy and increasing overall strength. Muscle hypertrophy refers to the growth and enlargement of muscle fibers, which occurs when muscles are subjected to resistance training. This type of training creates small tears in the muscle fibers, which then repair and adapt to handle greater loads over time. As a result, the muscles become larger and stronger.

The process is driven by several factors, including the mechanical tension generated during exercise, metabolic stress that occurs from intense training, and the muscle damage that stimulates repair and growth. Additionally, strength training can enhance protein synthesis, which is crucial for building muscle. The adaptation process not only increases muscle mass but also improves functional ability and athletic performance.

In contrast, the other options do not accurately reflect the benefits of strength training on muscle mass. Decreasing metabolism and overall body weight is contrary to the goal of strength training, which often aims to increase lean body mass. Limiting range of motion can impede muscle development and flexibility, while increasing body fat percentage contradicts the objectives of strength training, which is to improve body composition by increasing muscle and potentially reducing fat.