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Comparison of Two Objective Monitors for Assessing Physical Activity and Sedentary Behaviors in Bariatric Surgery Patients

  • Clinical Research
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Abstract

Background

Objective quantification of physical activity (PA) is needed to understand PA and sedentary behaviors in bariatric surgery patients, yet it is unclear whether PA estimates produced by different monitors are comparable and can be interpreted similarly across studies.

Methods

We compared PA estimates from the Stayhealthy RT3 triaxial accelerometer (RT3) and the Sensewear Pro2 Armband (SWA) at both the group and individual participant level. Bariatric surgery candidates were instructed to wear the RT3 and SWA during waking hours for 7 days. Participants meeting valid wear time requirements (≥4 days of ≥8 h/day) for both monitors were included in the analyses. Time spent in sedentary (<1.5 METs), light (1.5–2.9 METs), moderate-to-vigorous (MVPA; ≥3.0 METs), and total PA (TPA; ≥1.5 METs) according to each monitor was compared.

Results

Fifty-five participants (BMI 48.4 ± 8.2 kg/m2) met wear time requirements. Daily time spent in sedentary (RT3 582.9 ± 94.3; SWA 602.3 ± 128.6 min), light (RT3 131.9 ± 60.0; SWA 120.6 ± 65.7 min), MVPA (RT3 25.9 ± 20.9; SWA 29.9 ± 19.5 min), and TPA (RT3 157.8 ± 74.5; SWA 150.6 ± 80.7 min) was similar between monitors (p > 0.05). While the average difference in TPA between the two monitors at the group level was 7.2 ± 64.2 min; the average difference between the two monitors for each participant was 45.6 ± 45.4 min. At the group level, the RT3 and SWA provide similar estimates of PA and sedentary behaviors; however, concordance between monitors may be compromised at the individual level.

Conclusions

Findings related to PA and sedentary behaviors at the group level can be interpreted similarly across studies when either monitor is used.

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Acknowledgements

This research was funded by grants from The Warren Alpert Medical School of Brown University's Center of Excellence in Women's Health and the National Institute of Diabetes and Digestive and Kidney Diseases (K01 DK083438-01) awarded to Drs. Wing and Bond, respectively. Appreciation is expressed to Richard Daniello, B.A. for his assistance in processing the RT3 and SWA data.

Conflict of Interest

Dr. Jakicic received a grant from BodyMedia, Inc. (Pittsburgh, PA) to conduct a non-related study using the armband technology. Dr. Jakicic is also a scientific advisor to Free & Clear. All other authors declare no conflicts of interest.

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Authors and Affiliations

  1. Department of Psychiatry and Human Behavior, Warren Alpert Medical School of Brown University, The Miriam Hospital/Weight Control and Diabetes Research Center, 196 Richmond Street, Providence, RI, 02903, USA

    Jessica L. Unick, Dale S. Bond, Jennifer Trautvetter & Rena R. Wing

  2. Department of Health and Physical Activity, University of Pittsburgh, Pittsburgh, PA, USA

    John M. Jakicic

  3. Department of Surgery, Warren Alpert Medical School of Brown University, The Miriam Hospital, Providence, RI, USA

    Sivamainthan Vithiananthan

  4. Department of Surgery, Warren Alpert Medical School of Brown University, Rhode Island Hospital, Providence, RI, USA

    Beth A. Ryder & G. Dean Roye

  5. Department of Surgery, Roger Williams Hospital, Providence, RI, USA

    Dieter Pohl

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  1. Jessica L. Unick
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  2. Dale S. Bond
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  8. Jennifer Trautvetter
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  9. Rena R. Wing
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Correspondence to Jessica L. Unick.

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Unick, J.L., Bond, D.S., Jakicic, J.M. et al. Comparison of Two Objective Monitors for Assessing Physical Activity and Sedentary Behaviors in Bariatric Surgery Patients. OBES SURG 22, 347–352 (2012). https://doi.org/10.1007/s11695-011-0491-1

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  • DOI: https://doi.org/10.1007/s11695-011-0491-1

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