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Effects of Inspiratory Muscle Training on Muscular and Pulmonary Function After Bariatric Surgery in Obese Patients

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Abstract

Background

This study seeks to assess the effect of inspiratory muscle training (IMT) on pulmonary function, respiratory muscle strength, and endurance in morbidly obese patients submitted to bariatric surgery.

Methods

Thirty patients were randomly assigned to sham muscular training, or to IMT with a threshold device (40% of maximum inspiratory pressure, MIP), for 30 min/day, from the 2nd until 30th postoperative (PO) day. All of them were submitted to a standard respiratory kinesiotherapy and early deambulation protocol. Data on spirometry, maximum static respiratory pressures, and respiratory muscle endurance were collected on the PO days 2, 7, 14, and 30 in a blinded matter.

Results

IMT enabled increases in PO MIP and endurance, and an earlier recovery of the spirometry parameters FEV1, PEF, and FEF25–75%. Comparing to preoperative values, MIP was increased by 13% at the 30th PO day in the trained group, whereas control group had a reduction of 8%, with higher values for the IMT group (30th PO, IMT—130.6 ± 22.9 cmH2O; controls—112.9 ± 25.1 cmH2O; p < 0.05). Muscular endurance at the 30th PO day was increased in the trained group comparing to preoperative value (61.5 ± 39.6 s vs 114.9 ± 55.2 s; p < 0.05), a finding not observed in the control group (81.7 ± 44.3 vs 95.2 ± 42.0 s).

Conclusions

IMT improves inspiratory muscle strength and endurance and accounts for an earlier recovery of pulmonary airflows in morbidly obese patients submitted to bariatric surgery.

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Authors and Affiliations

  1. Course of Physiotherapy, University of Itauna, Itauna, Brazil

    Carla Cristine Cunha Casali

  2. Course of Physiotherapy, Department of Biomechanics, Medicine, and Rehabilitation of the Locomotor System, Faculty of Medicine of Ribeirao Preto, University of São Paulo, São Paulo, Brazil

    Ana Paula Manfio Pereira

  3. Division of Pulmonology/Department of Internal Medicine, Faculty of Medicine of Ribeirao Preto, University of São Paulo, São Paulo, Brazil

    José Antônio Baddini Martinez

  4. Course of Physiotherapy, Department of Biomechanics, Medicine, and Rehabilitation of the Locomotor System, Faculty of Medicine of Ribeirao Preto, University of São Paulo, São Paulo, Brazil

    Hugo Celso Dutra de Souza & Ada Clarice Gastaldi

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  1. Carla Cristine Cunha Casali
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  2. Ana Paula Manfio Pereira
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  3. José Antônio Baddini Martinez
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  4. Hugo Celso Dutra de Souza
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Correspondence to Ada Clarice Gastaldi.

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Casali, C.C.C., Pereira, A.P.M., Martinez, J.A.B. et al. Effects of Inspiratory Muscle Training on Muscular and Pulmonary Function After Bariatric Surgery in Obese Patients. OBES SURG 21, 1389–1394 (2011). https://doi.org/10.1007/s11695-010-0349-y

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  • DOI: https://doi.org/10.1007/s11695-010-0349-y

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