Weight loss and frequency of body‐weight self‐monitoring in an online commercial weight management program with and without a cellular‐connected ‘smart’ scale: a randomized pilot study
Open accessAbstract
Summary: Objective: Evaluate the effects of an online commercial weight management program, with and without provision of a ‘smart’ scale with instructions to weigh daily and weekly tailored feedback, on weight loss and the frequency of body‐weight self‐monitoring. Methods: Participants (N = 92; body mass index 27–40 kg/m 2) were randomized to 6 months of no‐cost access to the Weight Watchers Online (WWO) platform alone, or enhanced with a cellular‐connected ‘smart’ scale, instructions to weigh daily and weekly pre‐scripted email feedback (Weight Watchers Online Enhanced [WWO‐E]). The number of days that weight was self‐monitored (via ‘smart’ scale in WWO‐E and manually in WWO) was recorded automatically across the 6‐month trial. Objective weight was measured at baseline, 3 and 6 months. Results: While both groups achieved statistically significant weight loss, mean ± standard error weight loss did not differ between WWO‐E and WWO at 3 months (5.1 ± 0.6 kg vs. 4.0 ± 0.7 kg, respectively; p = 0.257) or 6 months (5.3 ± 0.6 kg vs. 3.9 ± 0.7 kg, respectively; p = 0.116). However, a greater proportion of WWO‐E lost ≥5% of initial body weight at 3 months (52.2% vs. 28.3%; p = 0.033), but not 6 months (43.5% vs. 30.4%; p = 0.280), compared with WWO. Mean ± standard deviation days with self‐monitored weight was higher in WWO‐E (80.5 ± 5.6; 44.7% of days) than WWO (12.0 ± 1.0; 6.7% of days; p < 0.001) across the 6‐month study period. Conclusions: This is the first study to show that provision of a ‘smart’ scale with weekly tailored feedback substantially increased the frequency of self‐weighing and the proportion of participants achieving an initial clinically significant ≥5% weight loss (52% vs. 28%) in an online commercial weight management program. Both WWO and WWO‐E produced significant weight loss over 6 months. While mean weight losses were slightly greater in the enhanced group, the difference was not statistically significant in this small sample. This study provides support for the clinical utility of online commercial weight management programs and the potential for supporting technology such as ‘smart’ scales to improve adherence to body‐weight self‐monitoring and clinical outcomes.
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Electronic self-monitoring tools have led to better adherence to self-monitoring in BWL than paper-and-pencil tracking.
“Electronic self-monitoring tools, as compared to paper-and-pencil tracking, have produced increased adherence to self-monitoring within BWL”
From Associations Between Self-Monitoring and Weight Change in Behavioral Weight Loss Interventions (2019) · cites this paper as Thomas et al., 2017
The Results report substantially more frequent body-weight self-monitoring with a smart scale than in the standard program. But the Methods (Study design; page not provided) say the comparison group entered weights through a website or mobile app, not on paper; the study therefore does not establish the claimed electronic-versus-paper comparison. (LLM, conf=0.90)
Experimental — accuracy not yet measuredPrevious studies showed that merely adding tracking tools to BWL may be of no benefit, or even have iatrogenic effects.
“Given previous studies showing that merely adding tracking tools to BWL may be of no benefit, or even have iatrogenic effects, use of these tools would have to be accompanied by a careful intervention strategy to guide participants in summarizing and interpreting their data to inform behavior change (Jakicic et al., 2016; Thomas et al., 2017).”
From Associations Between Self-Monitoring and Weight Change in Behavioral Weight Loss Interventions (2019) · cites this paper as Thomas et al., 2017
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Cites
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“Historically, self-monitoring of body weight occurred by stepping on a home scale and recording the entry in a paper diary; feedback was delivered in a verbal and/or written format in structured weight loss programs (6).”
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Cited by
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Forman, E. M., Goldstein, S. P., Crochiere, R. J., Butryn, M. L., Juarascio, A. S., Zhang, F., & Foster, G. D. (2019) · Translational Behavioral Medicine · doi:10.1093/tbm/ibz137 · Cited by 94 · see citing works
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Self-citationAssociations Between Self-Monitoring and Weight Change in Behavioral Weight Loss Interventions
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“Electronic self-monitoring tools, as compared to paper-and-pencil tracking, have produced increased adherence to self-monitoring within BWL (Carter, Burley, Nykjaer, & Cade, 2013; Spring et al., 2013; Thomas et al., 2017) and this should presumably lead to greater weight losses (Turk et al.”
BackgroundMethodInfluentialSelf-citation
- Authors
- Thomas, J. G., Raynor, H. A., Bond, D. S., Luke, A. K., Cardoso, C. C., Wojtanowski, A. C., Vander Veur, S., Tate, D., Wing, R. R., & Foster, G. D.
- Affiliations
- Brown University (US)
- University of Tennessee at Knoxville (US)
- WW International, Inc. (United States) (US)
- Weight Watchers International, Inc. New York City NY USA
- University of North Carolina at Chapel Hill (US)
- Corresponding author
- Thomas, J. G.
- Venue
- Obesity Science & Practice
- Publisher
- Wiley
- Published
- 2017-10-13
- Volume
- 3
- Issue
- 4
- Pages
- 365-372
- ISSN
- 2055-2238 (ISSN-L)
- PMC
- PMC5729493
- OpenAlex
- W2751742498
- Cited by
- 45
- References
- 9
- Citations by year
- 2026: 3 · 2025: 3 · 2024: 3 · 2023: 2 · 2022: 9 · 2021: 10 · 2020: 6 · 2019: 6 · 2018: 3
- FWCI
- 6.65
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Obesity Science & Practice (publishedVersion, cc-by-nc-nd)
- PubMed Central (publishedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- Funders
- Weight Watchers International, Inc. (N/A)
- Topics
- Health Sciences › Health Professions › General Health Professions › Mobile Health and mHealth Applications
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Obesity, Physical Activity, Diet
- Health Sciences › Nursing › Nutrition and Dietetics › Nutrition, Health and Food Behavior
- Keywords
- weight loss, smart scales, personalized feedback, weight loss maintenance, obesity treatment, digital health interventions, email feedback
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