Slow-twitch endurance athletes

Slow-twitch endurance athletes are individuals whose muscles are specialized for sustained, long-duration activities like marathon running or cycling. Their muscle fibers, called slow-twitch fibers, are highly efficient at using oxygen to produce energy, allowing them to perform steady effort for extended periods without fatigue. These athletes typically have a high density of capillaries and mitochondria in their muscles, supporting aerobic (oxygen-based) energy production. As a result, they excel in endurance sports that require prolonged, moderate-intensity effort, benefiting from their muscle's ability to sustain activity over time with excellent efficiency.