What effect does resistance exercise have on lean body mass?

Resistance exercise is known to have a significant positive impact on lean body mass. When individuals engage in resistance training, the mechanical tension placed on muscles prompts the body to undergo a series of physiological adaptations. This process includes muscle fiber hypertrophy, where the size of the muscle fibers increases, thereby contributing to overall lean body mass.

As muscles adapt to the increased demands of resistance exercise, the body also experiences enhanced protein synthesis, decreased muscle protein breakdown, and improved hormonal responses, all of which play a crucial role in building and preserving lean tissue. Therefore, the consistent practice of resistance exercise leads to a moderate to substantial increase in lean body mass over time, making it an effective approach for building strength and overall body composition.

Additionally, the increase in lean body mass is beneficial beyond just aesthetics; it contributes to improved metabolic health, increased strength and functional capacity, and better overall physical performance. This means that regular engagement in resistance exercise not only increases muscle size but also fortifies muscles against age-related loss and supports overall health.