Key result
A weight reduction program in children with obesity increased general heart rate variability and parasympathetic regulation, but did not alter stress reactivity.
Why the study?
Does an inpatient weight reduction program improve baseline and stress-induced heart rate variability in children with obesity?
Observational (n=87)
Does an inpatient weight reduction program improve baseline and stress-induced heart rate variability in children with obesity?
An inpatient weight reduction program in children with obesity shifts baseline autonomic activity toward parasympathetic dominance but does not alter autonomic reactivity during stress conditions.
Answers are grounded in this paper and cite their sources.
May support inpatient autonomic benefits in obese children; leaves open effects on stress reactivity and outcomes.
OBJECTIVE: Autonomic dysregulation is a well-established feature in adults with obesity but not in children. Since this dysregulation could contribute to weight dynamics, this study aimed to compare autonomic regulation in children with obesity and normal-weight peers and to track autonomic status during weight reduction. METHODS: Sixty children with obesity and 27 age- and sex-matched normal-weight healthy participants were included. Heart rate variability (HRV) was assessed at baseline and during a mental stress test and a subsequent recovery period. Children with obesity were investigated both upon admission and discharge. RESULTS: Upon admission, no significant differences in HRV parameters were found for normal-weight participants and those with obesity. Inpatient treatment led to significant changes in HRV with increase in general variability (standard deviation of the normal-to-normal interval (SDNN), P < 0.001) as well as of parasympathetic regulation (root mean square successive difference (RMSSD) and high frequency power (logHF), P < 0.01). Children with obesity had sympathetic activation similar to normal-weight controls during mental stress with subsequent return to baseline values, and weight loss did not affect this profile. CONCLUSIONS: A weight reduction program induced a change in autonomic activity in children with obesity toward parasympathetic dominance but had no influence on autonomic nervous system reactivity during stress conditions.
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Mazurak et al. (2015) conducted an observational in Obesity (n=87). Weight reduction program vs. Baseline values and normal-weight peers was evaluated on Heart rate variability (HRV) at baseline, during mental stress, and recovery (p=<0.001). A weight reduction program in children with obesity increased general heart rate variability and parasympathetic regulation, but did not alter stress reactivity.
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