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Nervous System Activity is a Pointer to Successful Weight Loss | |
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A recent study has shown that successful weight losers had significantly higher resting nerve activity compared to weight-loss resistant individuals.
"We have demonstrated for the first time that resting muscle sympathetic nerve activity (MSNA) is a significant independent predictor of weight-loss outcome in a cohort of overweight or obese subjects," said Nora Straznicky, PhD, of the Baker IDI Heart & Diabetes Institute in Melbourne, Australia and lead author of the study. "Our findings provide two opportunities. First, we may be able to identify those persons who would benefit most from lifestyle weight-loss interventions such as dieting. Secondly, the findings may also help in developing weight-loss treatments through stimulating this specific nervous activity."
In this study, researchers examined 42 overweight or obese subjects who had participated in dietary-lifestyle intervention trials that cut their daily caloric intake by 30 percent for 12 weeks. MSNA was measured by microneurography, a process involving the insertion of metal microelectrodes into nerve fascicles (a bundle of nerve fibers). Researchers found that weight loss was independently predicted by baseline resting MSNA.
"We also found that successful weight losers demonstrated large increases in nerve activity following a carbohydrate test meal, whereas the responses were completely blunted in weight-loss resistant subjects," said Straznicky. "Our findings suggest a significant contribution of subconscious nervous system activity to the success of dietary weight loss."
Other researchers working on the study include Nina Eikelis, Paul Nestel, John Dixon, Tye Dawood, Mariee Grima, Carolina Sari, Markus Schlaich, Murray Esler, Alan Tilbrook, Gavin Lambert and Elisabeth Lambert of Baker IDI Heart & Diabetes Institute.
The article, "Baseline sympathetic nervous system activity predicts dietary weight loss in obese metabolic syndrome subjects," appears in the February 2012 issue of JCEM.
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