Which body type does a marathon runner typically represent?

A marathon runner typically represents the ectomorph body type. Ectomorphs are characterized by a slim, lean physique with long limbs and low body fat. This body type is advantageous for endurance sports, such as marathon running, because it allows for better efficiency in movement and less weight to carry over long distances. Ectomorphs generally have a fast metabolism, making it easier for them to maintain lower body fat levels, which is essential for optimal performance in endurance events.

In contrast, mesomorphs are usually well-built with a muscular and athletic appearance, making them more suited for explosive sports requiring strength and power rather than endurance. Endomorphs tend to have a rounder physique and may carry more body fat, which can hinder performance in long-distance running due to an increased energy demand. While there are successful athletes in all body types across various sports, the ectomorph physique aligns most closely with the typical characteristics of a marathon runner.