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A Higher Phase Angle Is Associated with Greater Metabolic Equivalents in Women 1 Year After Bariatric Surgery

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Abstract

Background

Phase angle (PhA), proposed as an indicator of the number, integrity, and function of cells and evaluated in some clinical situations, decreases after bariatric surgery (BS). In contrast, higher values are found in physically active or exercising individuals. We therefore evaluated the influence of physical activity on PhA after BS.

Methods

The PhA and body composition (obtained by bioelectrical impedance analysis), physical activity level (obtained by International Physical Activity Questionnaire), and metabolic equivalents (METs) were evaluated in adult women submitted to BS. The PhA and body composition were evaluated at three time points: before and 6 and 12 months after surgery. Physical activity level and METs were measured at the two postoperative time points.

Results

A reduction in PhA was observed 6 (p < 0.01) and 12 months (p < 0.01) after BS, with no significant difference between time points. A moderate or high physical activity level was found in 81% of the volunteers after 6 months and in 65% after 12 months. METs were reduced after 12 months compared to 6 months. A positive correlation (p < 0.05) was observed between PhA and body cell mass after surgery. There was a significant positive correlation (p < 0.01) between PhA and METs after 12 months.

Conclusions

Physical activity may attenuate the PhA reduction that occurs after BS, with this parameter reflecting the engagement of these patients in this type of activity.

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Funding

We thank the Foundation for the Support of Research and Innovation of Espirito Santo (FAPES) scholarship granted to R.M. This work was supported by the FAPES (grant #85198560) and the Coordination for the Improvement of Higher Education Personnel (CAPES).

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Authors and Affiliations

  1. Postgraduate Program in Nutrition and Health (PPGNS), Federal University of Espírito Santo, Vitória, Brazil

    Renata Manoel, Fernanda A. Venâncio, Fabiano K. Haraguchi & Rogerio G. Pedrosa

  2. Department of Surgical Clinic, Health Sciences Center, Federal University of Espírito Santo, Vitória, Brazil

    Gustavo P. S. Miguel

  3. Department of Integrated Education in Health, Health Sciences Center, Federal University of Espírito Santo, Vitória, Brazil

    Fabiano K. Haraguchi & Rogerio G. Pedrosa

Authors
  1. Renata Manoel
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  2. Fernanda A. Venâncio
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  3. Gustavo P. S. Miguel
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  4. Fabiano K. Haraguchi
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  5. Rogerio G. Pedrosa
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Contributions

RM, FAV, GPSM, FKH and RGP participated in the conception and design of the study. RM and FAV participated in the collection of data. RM, FAV, GPSM, FKH and RGP participated in the analysis and interpretations of data. RM and RGP wrote the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Rogerio G. Pedrosa.

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Ethics Approval

The study was approved by the local ethics committees (#51519115.7.0000.5071) and performed in accord with the ethical standards of the Declaration of Helsinki.

Consent to Participate

Informed consent was obtained from all individual participants included in the study.

Conflict of Interest

The authors declare no competing interests.

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Key Points

• Phase angle is a novel marker for outcomes following bariatric surgery.

• Physical activity can attenuate the phase angle reduction after bariatric surgery.

• The phase angle can suggest the level of physical activity and vice versa.

• Future studies could consider physical activity in determining the phase angle.

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Manoel, R., Venâncio, F.A., Miguel, G.P.S. et al. A Higher Phase Angle Is Associated with Greater Metabolic Equivalents in Women 1 Year After Bariatric Surgery. OBES SURG 32, 2003–2009 (2022). https://doi.org/10.1007/s11695-022-06050-8

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  • DOI: https://doi.org/10.1007/s11695-022-06050-8

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