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Effect of Weight Loss on Aerobic Capacity in Patients with Severe Obesity Before and After Bariatric Surgery

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Abstract

Severe obesity has been associated with adverse effects on physical capacity. In a prospective study, the aerobic capacity of severely obese patients was measured in order to observe the physiological response to weight loss from bariatric surgery. Sixty-five consecutive patients (40.4 ± 8.4 years old; 93.8% female; body mass index = 49.4 ± 5.4 kg/m2) were evaluated before bariatric surgery and then 6 and 12 months after surgery. Aerobic capacity was assessed with a scientific treadmill to measure maximal oxygen consumption (VO2max), heart rate, blood pressure, time on the treadmill, and distance walked (modified Bruce test). For the three observational periods, VO2max was 25.4 ± 9.3, 29.8 ± 8.1, and 36.7 ± 8.3 ml/kg/min; time on the treadmill was 5.4 ± 1.4, 6.4 ± 1.6, and 8.8 ± 1.0 min; and distance walked was 401.8 ± 139.1, 513.4 ± 159.9, and 690.5 ± 76.2 m. For these variables, significant results (p = 0.0000) were observed for the two postoperative periods in relation to the preoperative period. Severely obese individuals increased their aerobic capacity after successful bariatric surgery. The data also suggests that a positive and progressive relationship between weight loss and improvement in fitness as a moderate loss of weight 6 months after surgery already showed some benefit and an additional reduction in weight was associated with a better performance in the aerobic capacity tests at the 12-month follow-up.

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Acknowledgments

The authors would like to acknowledge Dr. Antonio Carlos Valezi. This work was supported by Fundação de Amparo à Pesquisa do Estado de São Paulo.

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Authors and Affiliations

  1. Department of Physical Therapy, Londrina State University, Rua Robert Koch, 60 Vila Operária, 86038-440, Londrina, Paraná, Brazil

    Shirley Aparecida Fabris de Souza

  2. Department of Gastroenterology, Hospital das Clínicas, São Paulo University, São Paulo, SP, Brazil

    Joel Faintuch

  3. Ergometry Service, Hospital Universitário, Londrina State University, Londrina, PR, Brazil

    Antonio Fernando Sant’Anna

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  1. Shirley Aparecida Fabris de Souza
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  2. Joel Faintuch
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  3. Antonio Fernando Sant’Anna
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Correspondence to Shirley Aparecida Fabris de Souza.

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de Souza, S.A.F., Faintuch, J. & Sant’Anna, A.F. Effect of Weight Loss on Aerobic Capacity in Patients with Severe Obesity Before and After Bariatric Surgery. OBES SURG 20, 871–875 (2010). https://doi.org/10.1007/s11695-010-0109-z

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  • DOI: https://doi.org/10.1007/s11695-010-0109-z

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