Baseball is a physically demanding sport that requires a unique combination of strength, power, speed, agility, and endurance. To perform at a high level, baseball players must possess a strong foundation of physical fitness, which encompasses cardiovascular endurance, muscular strength and endurance, flexibility, and body composition (American College of Sports Medicine, 2018) ^[1]. However, the physical demands of baseball can also increase the risk of injury, particularly to the shoulder, elbow, and knee joints (Conte et al., 2016) ^[2].

Despite the importance of physical fitness in baseball, there is a need for further research on the optimal training methods and programs for enhancing physical fitness in baseball players. This review aims to summarize the current literature on physical fitness in baseball players, with a focus on the components of physical fitness, training methods, and injury prevention strategies.