Hormonal
Diet-induced weight loss in individuals with metabolic syndrome reduces sympathetic nerve activity by altering the firing pattern of single vasoconstrictor fibers (decreasing firing rate, probability, and multiple firing incidence), rather than solely by reducing the recruitment of active fibers.
If you have metabolic syndrome, losing weight through a calorie-restricted diet (specifically a DASH-style diet) does more than just shrink fat cells; it fundamentally reprograms your nervous system's stress signals. This reprogramming slows down the firing rate and frequency of the nerves that constrict blood vessels, directly lowering blood pressure and heart rate. This suggests that weight loss is a potent 'nerve-calming' therapy for metabolic health.
The sympathoinhibition associated with weight loss involves marked changes, not only in the rate but also in the firing pattern of active vasoconstrictive fibers.
Why this rating
Small sample size (n=14) and lack of a weight-stable control group limit causal certainty, though the physiological measurements are precise.
Source
Change in sympathetic nerve firing pattern associated with dietary weight loss in the metabolic syndrome
Élisabeth Lambert · Frontiers in Physiology · 2011
DOI 10.3389/fphys.2011.00052
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