Reference : Dietary restriction, cardiac autonomic regulation and stress reactivity in bulimic women
Scientific journals : Article
Social & behavioral sciences, psychology : Animal psychology, ethology & psychobiology
Social & behavioral sciences, psychology : Neurosciences & behavior
Social & behavioral sciences, psychology : Theoretical & cognitive psychology
Social & behavioral sciences, psychology : Treatment & clinical psychology
Human health sciences : Psychiatry
Dietary restriction, cardiac autonomic regulation and stress reactivity in bulimic women
Vögele, Claus mailto [University of Luxembourg > Faculty of Language and Literature, Humanities, Arts and Education (FLSHASE) > Integrative Research Unit: Social and Individual Development (INSIDE) >]
Hilbert, Anja [> >]
Tuschen-Caffier, Brunna [> >]
Physiology and Behavior
[en] Bulimia nervosa ; Cardiac autonomic regulation ; Dietary restriction ; Psychophysiological reactivity
[en] Recent !ndings suggest sympathetic inhibition during dietary restriction as opposed to increased sympathetic activity during re-feeding. The present study investigated cardiac autonomic regulation and stress reactivity in relation to biochemical markers of dietary restriction status in women diagnosed with bulimia nervosa. We predicted that bulimic individuals (BN) with a biochemical pro!le indicating dietary restriction exhibit reduced cardiac sympathetic and/or increased vagal activity. We also hypothesized, that BN with a biochemical pro!le within a normal range (i.e. currently not dieting or malnourished) would show heart rate variability responses (HRV) and reactivity to mental stress indicating increased sympathetic activation compared with non-eating disordered controls. Seventeen female volunteers diagnosed with bulimia nervosa were categorized according to their serum pro!le (glucose, pre-albumin, IGF-1, TSH, leptin) into currently fasting versus non-fasting and compared with 16 non-eating disordered controls matched for age and BMI. Spectral components of HRV were calculated on heart rate data from resting and mental stress periods (standardized achievement challenge) using autoregressive analysis. Compared to non-fasting BN and controls, fasting BN showed increased vagal and decreased sympathetic modulation during both resting and recovery periods. Cardiac autonomic regulation was not impaired in response to mental challenge. No differences could be found between non-fasting BN and controls. The results con!rm the notion of cardiac sympathetic inhibition and vagal dominance during dietary restriction and suggest the speci!city of starvation related biochemical changes for cardiac autonomic control. The results are discussed in terms of the higher incidence in cardiac complications in these patients.
Researchers ; Students

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