Genetics influence one’s response to fitness training by affecting factors such as muscle fiber composition, metabolic rate, and responsiveness to exercise. Some individuals may naturally possess a higher proportion of fast-twitch fibers, which can enhance strength and power performance, while others may excel in endurance due to slow-twitch fibers. Genetic predispositions can also determine recovery rates and susceptibility to injuries, impacting training consistency. Understanding these genetic factors can help personalize fitness programs for optimal results, ensuring tailored approaches suit each individual's unique potential.