Genetic factors play a crucial role in determining fitness potential. Genetics can influence factors such as muscle fiber composition, metabolism, and body shape, affecting how individuals respond to different types of exercise. For instance, some people may have a natural predisposition for endurance activities due to greater oxidative capacity, while others may excel in strength-based endeavors due to a higher ratio of fast-twitch muscle fibers. Nevertheless, while genetics set a baseline, lifestyle factors such as diet, training regimens, and consistency play significant roles in achieving fitness goals, supporting the interplay between nature and nurture.