Impact of Aerobic Exercise Training on Heart Rate Variability and Functional Capacity in Obese Women After Gastric Bypass Surgery
- 939 Downloads
Obesity is a major public health concern on a global scale. Bariatric surgery is among the treatment options, resulting in significant and sustainable weight loss as well as amelioration of comorbidities. The purpose of this study was to evaluate whether a 12-week aerobic exercise program positively impacts heart rate variability (HRV) and functional capacity after gastric bypass surgery (GBS) in a female cohort.
Of the 52 patients initially recruited, 21 were randomized to a training group (TG) or control group and successfully completed the study. Patients were tested on two occasions: 1 week before GBS and 4 months after GBS. Anthropometric variables, body composition, record of heart rate and R-R intervals, and 6-min walk test (6MWT) were assessed at both time points. The TG underwent an aerobic exercise training program on a treadmill (1-h session, totaling 36 sessions over 12 weeks).
The main findings from this study were: (1) only the TG demonstrated a significant increase (p < 0.05) in all indexes of heart rate variability (HRV) after 12 weeks of aerobic exercise training and (2) only the TG demonstrated a significant increase (p < 0.05) in 6MWT distance and decrease in diastolic blood pressure after aerobic exercise training.
We conclude that 12 weeks of aerobic exercise training improves cardiac autonomic modulation and functional capacity 4 months after GBS.
KeywordsBariatric surgery Autonomic nervous system Morbid obesity Severe obesity Body mass index Body composition Physical fitness Weight loss
The authors would like to thank the Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP-07/53202-9) and the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) for providing both financial and material support. In addition, the authors also thank the medical gastroenterologists: Noé Carvalho Azambuja Jr and João do Nascimento Ortega. More importantly, however, the authors thank the patients for their effort and enthusiastic cooperation throughout the study.
Conflict of Interest
The authors declare that they have no conflict of interest related to the article or the research described.
- 2.World Health Organization (WHO). Obesity: preventing and managing the global epidemic: report of a WHO consultation. Geneva: World Health Organization; 2000. Technical report series no. 894.Google Scholar
- 3.Brazilian Institute of Geography and Statistics. Household Budget Survey 2002–2003. Available at: http://www.abeso.org.br (last accessed 20 April 2010).
- 4.Ministry of Health of Brazil. Vigitel Brazil 2008: monitoring of risk and protective factors for chronic diseases through telephone survey/Ministry of Health, Secretariat of Health Surveillance, Secretariat for Strategic and Participative Management. Brasilia, 2009.Google Scholar
- 5.Stegen S, Derave W, Calders P, et al. Physical fitness in morbidly obese patients: effect of gastric bypass surgery and exercise training. Obes Surg. 2009 [Epub ahead of print].Google Scholar
- 29.ATS statement: guidelines for the six-minute walk test. Am J Respir Crit Care Med. 2002; 166:111–7.Google Scholar
- 32.Gibbons RJ, Balady GJ, Bricker JT, et al. ACC/AHA 2002 guideline update for exercise testing: summary article: a report of the American college of cardiology/American heart association task force on practice guidelines (Committee to update the 1997 exercise testing guidelines). Circulation. 2002;106:1883–92.PubMedCrossRefGoogle Scholar
- 34.Josbeno DA, Jakicic JM, Hergenroeder A, et al. Physical activity and physical function changes in obese individuals after gastric bypass surgery. Surg Obes Relat Dis. 2008;6:361–6.Google Scholar
- 37.Sztaizel J, Jung M, Sievert K, et al. Cardiac autonomic profile in different sports disciplines during all-day activity. J Sports Med Phys Fitness. 2008;48:495–501.Google Scholar