The factors that significantly influenced the reduction in the 6MWT distance in both sexes included old age; higher body weight and abdominal circumference; lower muscle strength; the presence of depressive syndromes, joint diseases, coronary heart disease, stroke, or diabetes; lower education level; non-Caucasian race; angiotensin-converting enzyme inhibitor use; higher concentrations of fibrinogen; and higher white blood cell (WBC) count [33]. Here, ACE is linked to diabetes mellitus.