Cited by 267Mobile Health and mHealth ApplicationsPhysical Activity and HealthDigital Mental Health Interventions

mActive: A Randomized Clinical Trial of an Automated mHealth Intervention for Physical Activity Promotion

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Martin, Seth S., Feldman, David I., Blumenthal, Roger S., Jones, Steven R., Post, Wendy S., McKibben, Rebeccah A., Michos, Erin D., Ndumele, Chiadi E. +3 more·2015·Journal of the American Heart Association

Abstract

Background: We hypothesized that a fully automated mobile health ( mH ealth) intervention with tracking and texting components would increase physical activity. Methods and Results: mA ctive enrolled smartphone users aged 18 to 69 years at an ambulatory cardiology center in Baltimore, Maryland. We used sequential randomization to evaluate the intervention's 2 core components. After establishing baseline activity during a blinded run‐in (week 1), in phase I (weeks 2 to 3), we randomized 2:1 to unblinded versus blinded tracking. Unblinding allowed continuous access to activity data through a smartphone interface. In phase II (weeks 4 to 5), we randomized unblinded participants 1:1 to smart texts versus no texts. Smart texts provided smartphone‐delivered coaching 3 times/day aimed at individual encouragement and fostering feedback loops by a fully automated, physician‐written, theory‐based algorithm using real‐time activity data and 16 personal factors with a 10 000 steps/day goal. Forty‐eight outpatients (46% women, 21% nonwhite) enrolled with a mean± SD age of 58±8 years, body mass index of 31±6 kg/m 2 , and baseline activity of 9670±4350 steps/day. Daily activity data capture was 97.4%. The phase I change in activity was nonsignificantly higher in unblinded participants versus blinded controls by 1024 daily steps (95% confidence interval [ CI ], −580 to 2628; P =0.21). In phase II , participants receiving texts increased their daily steps over those not receiving texts by 2534 (95% CI , 1318 to 3750; P <0.001) and over blinded controls by 3376 (95% CI , 1951 to 4801; P <0.001). Conclusions: An automated tracking‐texting intervention increased physical activity with, but not without, the texting component. These results support new mH ealth tracking technologies as facilitators in need of behavior change drivers. Clinical Trial Registration: URL : http://ClinicalTrials.gov/ . Unique identifier: NCT01917812 .

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Crossref · 10.1161/jaha.115.002239

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  • 4 studies included either an unstructured follow-up phase or an additional intervention phase utilizing a nonblinded activity tracker for all participants.

    “In addition, 4 studies included either an unstructured follow-up phase [34,42] or additional intervention phase utilizing a nonblinded activity tracker for all participants [41,50].”

    From Consumer-based wearable activity trackers increase physical activity participation: systematic review and meta-analysis (2019) · cites this paper as [41]

    The Methods (Trial Design; page unavailable) describe an additional intervention phase involving unblinded activity tracking. However, only the participants already assigned to unblinded tracking entered that phase’s texting randomization; a blinded control group remained. The paper therefore does not support the claim that the tracker was nonblinded for all participants. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • 17 studies specified that participants must have regular access to the internet, a computer, tablet, and/or smartphone.

    “Furthermore, 17 studies specified that the participant must have regular access to the internet, a computer, tablet, and/or smartphone [21,30,33,35-37,39,41-47,51-53]”
  • 17 studies reported activity tracker adherence data, with 13 of these reporting activity tracker wear on at least 50% of the study intervention days.

    “Moreover, 17 studies reported activity tracker adherence data [21,22,30,32,34,35, 37,38,40,41,43-45,50-52,54], with 13 of these studies [21,22,30,34,35,40,41,43,44,50-52,54] reporting activity tracker wear on at least 50% of the study intervention days.”
  • Physical activity interventions, including texting, gamification and social or financial incentives, can promote physical activity.

    “PA interventions, including texting, gamification and social or financial incentives, can promote PA”
  • In the mActive trial, the text messaging group increased daily steps by 2,534 compared with the no-texting unblinded group and by 3,376 compared with blinded controls.

    “The text messaging group increased their daily steps by 2,534 compared with the no-texting unblinded group and by 3,376 steps compared with blinded controls40.”

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Authors
Martin, S. S., Feldman, D. I., Blumenthal, R. S., Jones, S. R., Post, W. S., McKibben, R. A., Michos, E. D., Ndumele, C. E., Ratchford, E. V., Coresh, J., & Blaha, M. J.
Affiliations
Johns Hopkins University (US)
Corresponding author
Martin, Seth S.
Venue
Journal of the American Heart Association
Published
2015-10-29
Volume
4
Issue
11
ISSN
2047-9980 (ISSN-L)
OpenAlex
W2178720062
Cited by
267
References
35
Citations by year
2026: 10 · 2025: 14 · 2024: 20 · 2023: 29 · 2022: 25 · 2021: 33 · 2020: 37 · 2019: 26 · 2018: 37 · 2017: 22 · 2016: 10 · 2015: 1
FWCI
42.56
Type
journal article
Language
en
Open access
Licence
cc-by-nc
Locations
  • Journal of the American Heart Association (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (UL1TR001079)
  • National Heart, Lung, and Blood Institute (T32 HL 07024, T32HL007024)
  • National Center for Advancing Translational Sciences
Topics
  • Health Sciences › Health Professions › General Health Professions › Mobile Health and mHealth Applications
  • Health Sciences › Medicine › Physiology › Physical Activity and Health
  • Social Sciences › Psychology › Applied Psychology › Digital Mental Health Interventions
Keywords
mobile health, physical activity promotion, automated text messaging, step count goals, behavior change, sedentary adults, real-time feedback
MeSH terms
Adolescent, Adult, Aged, Algorithms, Automation, Cardiovascular Diseases, Counseling, Female, Health Promotion, Health Status, Humans, Health Knowledge, Attitudes, Practice, Male, Middle Aged, Motivation, Motor Activity, Pilot Projects, Risk Factors, Time Factors, Baltimore, Health Behavior, Exercise, Telemedicine, Risk Reduction Behavior, Cell Phone, Young Adult, Actigraphy, Text Messaging, Mobile Applications

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