Key result
A 12-week supervised exercise training program after bariatric surgery did not provide additional improvements in heart rate variability parameters at 12 months compared to surgery alone (p>0.05).
Why the study?
To assess the impact of bariatric surgery and an added supervised exercise training programme on heart rate variability in patients with severe obesity.
Does a supervised exercise training programme improve heart rate variability in patients with severe obesity after bariatric surgery?
RCT (n=59)
Does a supervised exercise training programme improve heart rate variability in patients with severe obesity after bariatric surgery?
A 12-week supervised exercise training program after bariatric surgery does not provide additional improvements in heart rate variability beyond the benefits of the surgery itself.
Answers are grounded in this paper and cite their sources.
Supervised exercise adds no HRV benefit after bariatric surgery; confirms surgery alone drives autonomic recovery at 12 months.
Purpose To assess the impact of bariatric surgery and an added supervised exercise training programme on heart rate variability (HRV) in patients with severe obesity. Methods Fifty‐nine patients who underwent bariatric surgery were randomised in the post‐operative period to a 12‐week supervised exercise training programme (moderate intensity combination aerobic/resistance exercise training programme) or a control group. Indices of HRV including time‐domain, spectral‐domain, and nonlinear parameters were measured preoperatively, and at 3, 6, and 12 months. Results After the surgical procedure, both groups improved anthropometric parameters. Type 2 diabetes, hypertension, and dyslipidemia resolutions were similar between groups. Total body weight loss at 6 and 12 months were also comparable between groups (6 months: 28 ± 6 vs. 30 ± 6%; 12 months: 38 ± 9 vs. 38 ± 10%; control vs. intervention group respectively). Bariatric surgery improved HRV parameters at 12 months compared to the pre‐operative values in the intervention group: standard deviation of R‐R interval (SDNN) (156.0 ± 46.4 vs. 122.6 ± 33.1 ms), low frequency (LF) (6.3 ± 0.8 vs. 5.8 ± 0.7 ms 2 ), and high frequency (HF) (5.1 ± 0.8 vs. 4.7 ± 0.9 ms 2 ) (all p <0.001). For the control patients, similar improvements in SDNN (150.0 ± 39.4 vs. 118.8 ± 20.1 ms), LF (6.1 ± 0.9 vs. 5.7 ± 0.8 ms 2 ), and HF (5.0 ± 0.9 vs. 4.7 ± 0.9 ms 2 ) were obtained (all p <0.001). However, there was no add‐on impact of the supervised exercise training programme on HRV after 12 months ( p >0.05 for all HRV parameters). Conclusion Bariatric surgery is associated with an improvement in HRV. A supervised exercise training programme in the post‐operative period did not modulate further the benefits of bariatric surgery regarding HRV parameters.
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Belzile et al. (2021) conducted an RCT in severe obesity (n=59). Supervised exercise training programme vs. Control group was evaluated on Heart rate variability (HRV) parameters (p=>0.05). A 12-week supervised exercise training program after bariatric surgery did not provide additional improvements in heart rate variability parameters at 12 months compared to surgery alone (p>0.05).
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