Evidence map›Paper›PMID 30192907›Full record

Trial reportAnnals of behavioral medicine : a publication of the Society of Behavioral Medicine2019

Efficacy of Contextually Tailored Suggestions for Physical Activity: A Micro-randomized Optimization Trial of HeartSteps.

Predrag Klasnja, Shawna Smith, Nicholas J Seewald, Andy Lee, Kelly Hall, Brook Luers, Eric B Hekler, Susan A Murphy

Registry-linked trialAbstract readRandomized Controlled Trial
PubMed Full text at PMC Publisher
In one paragraph

Trial report in Annals of behavioral medicine : a publication of the Society of Behavioral Medicine, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03225521 (HeartSteps), which is not on this map. Cited by 137 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
137citing papers in PubMed, 6 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT03225521 nacompletednot on this map

HeartSteps: a Just-in-Time Adaptive Intervention for Increasing Physical Activity Amongst Sedentary Adults.

TypeinterventionalSponsorKaiser PermanenteRan2015 to 2016Enrolled44ConditionsPhysical ActivityArmsHeartSteps: A just-in-time adaptive intervention for increasing physical activity amongst sedentary adults.
3 · Its place in the literature

Who cites it

137 citing papers in PubMed, 6 syntheses or guidelines pooled it.

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  11. Optimization of a Mobile Transdiagnostic Emotion Regulation Intervention for University Students: A Micro-Randomized Trial.Stress and health : journal of the International Society for the Investigation of Stress · 2025
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77 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Predrag KlasnjaKaiser Permanente Washington Health Research Institute, Minor Ave, Suite, Seattle, WA, USA.
Shawna SmithInsitute for Social Research, University of Michigan, Ann Arbor, MI, USA.
Nicholas J SeewaldDepartment of Statistics, University of Michigan, Ann Arbor, MI, USA.
Andy LeeSchool of Information, University of Michigan, Ann Arbor, MI, USA.
Kelly HallDepartment of Statistics, University of Michigan, Ann Arbor, MI, USA.
Brook LuersDepartment of Statistics, University of Michigan, Ann Arbor, MI, USA.
Eric B HeklerSchool of Medicine, University of California San Diego, San Diego, CA, USA.
Susan A MurphyDepartment of Statistics, Harvard University, Cambridge, MA, USA.

Funding

Yale Clinical and Translational Science Award (U Component)UL1TR001863 · NCATS · YALE UNIVERSITY · PI John H. Krystal, LUCILA OHNO-MACHADO · 2016 to 2026
$102.9M
Pilot, Mentoring, and Professional Development CoreP50DA039838 · NIDA · PENNSYLVANIA STATE UNIVERSITY, THE · PI LI, RUNZE · 2015 to 2019
$13.9M
TRAINING U54EB020404 · NIBIB · UNIVERSITY OF MEMPHIS · PI KUMAR, SANTOSH · 2014 to 2018
$11.3M
Heart Steps: Adaptive mHealth intervention for physical-activity maintenanceR01HL125440 · NHLBI · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI Predrag Klasnja · 2015 to 2026
$3.8M
Data-Based Methods for Just-In-Time Adaptive Interventions in Alcohol UseR01AA023187 · NIAAA · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI MURPHY, SUSAN A · 2015 to 2019
$2.6M
Operationalizing Behavioral Theory for mHealth: Dynamics, Context, and PersonalizationU01CA229445 · NCI · UNIVERSITY OF SOUTHERN CALIFORNIA · PI KLASNJA, PREDRAG, MARLIN, BENJAMIN M. · 2018 to 2022
$2.1M
NCATS NIH HHS UL1 TR001863NCI NIH HHS U01 CA229445NHLBI NIH HHS R01 HL125440NIAAA NIH HHS R01 AA023187NIBIB NIH HHS U54 EB020404NIDA NIH HHS P50 DA039838
6 · The paper itself

Abstract

backgroundHeartSteps is an mHealth intervention that encourages regular walking via activity suggestions tailored to the individuals' current context. PURPOSE: We conducted a micro-randomized trial (MRT) to evaluate the efficacy of HeartSteps' activity suggestions to optimize the intervention.

methodsWe conducted a 6-week MRT with 44 adults. Contextually tailored suggestions could be delivered up to five times per day at user-selected times. At each of these five times, for each participant on each day of the study, HeartSteps randomized whether to provide an activity suggestion, and, if so, whether to provide a walking or an antisedentary suggestion. We used a centered and weighted least squares method to analyze the effect of suggestions on the 30-min step count following suggestion randomization.

resultsAveraging over study days and types of activity suggestions, delivering a suggestion versus no suggestion increased the 30-min step count by 14% (p = .06), 35 additional steps over the 253-step average. The effect was not evenly distributed in time. Providing any type of suggestion versus no suggestion initially increased the step count by 66% (167 steps; p < .01), but this effect diminished over time. Averaging over study days, delivering a walking suggestion versus no suggestion increased the average step count by 24% (59 steps; p = .02). This increase was greater at the start of study (107% or 271 additional steps; p < .01), but decreased over time. Antisedentary suggestions had no detectable effect on the 30-min step count.

conclusionContextually tailored walking suggestions are a promising way of initiating bouts of walking throughout the day. CLINICAL TRIAL INFORMATION: This study was registered on ClinicalTrials.gov number NCT03225521.

Indexed as

Outcome and Process Assessment, Health CareWalkingAdultFemaleHealth PromotionHumansMaleMiddle AgedTelemedicineBehavior changeMicro-randomized trialsMobile healthPhysical activityWalking

Identifiers

PMID30192907
PMCPMC6401341

What OpenQuestion holds

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Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.