Intervention studies have demonstrated that the autonomic disturbances of the metabolic syndrome may be reversible. A reduction in body weight induced by a hypocaloric diet exerts a marked reduction in sympathetic activity in obese people with or without metabolic syndrome. Incorporation of regular, moderate intensity aerobic exercise training during a dietary weight loss program does not confer additional benefits on resting sympathetic neural activity, compared with weight loss by diet alone. A new method has been developed to examine the sympathetic-parasympathetic status of an individual - the cholinergic status. Cholinergic Status represents the total soluble circulation capacity for acetylcholine hydrolysis. Higher cholinergic status means the individual is more sympathetic .