The health of the gut microbiome is closely related to fitness performance, as a balanced microbiome contributes to better digestion, nutrient absorption, and immune function. A diverse gut microbiome can enhance metabolism and influence the body's inflammatory response, both of which can impact athletic performance. Research suggests that specific probiotics may boost exercise recovery and overall metabolic efficiency. Moreover, dietary choices that support a healthy gut microbiome, such as high-fiber foods and fermented products, can further optimize physical performance and endurance.