A Wearable Sensor-Based Exercise Biofeedback System: Mixed Methods Evaluation of Formulift

DC FieldValueLanguage
dc.contributor.authorO'Reilly, Martin-
dc.contributor.authorSlevin, Patrick-
dc.contributor.authorWard, Tomás-
dc.contributor.authorCaulfield, Brian-
dc.date.accessioned2019-03-22T12:38:51Z-
dc.date.available2019-03-22T12:38:51Z-
dc.date.copyright2018 the Authorsen_US
dc.date.issued2018-01-31-
dc.identifier.citationJMIR Mhealth and Uhealthen_US
dc.identifier.urihttp://hdl.handle.net/10197/9662-
dc.description.abstractBackground: Formulift is a newly developed mobile health (mHealth) app that connects to a single inertial measurement unit (IMU) worn on the left thigh. The IMU captures users movements as they exercise, and the app analyzes the data to count repetitions in real time and classify users exercise technique. The app also offers feedback and guidance to users on exercising safely and effectively. Objective: The aim of this study was to assess the Formulift system with three different and realistic types of potential users (beginner gym-goers, experienced gym-goers, and qualified strength and conditioning [S&C] coaches) under a number of categories: (1) usability, (2) functionality, (3) the perceived impact of the system, and (4) the subjective quality of the system. It was also desired to discover suggestions for future improvements to the system. Methods: A total of 15 healthy volunteers participated (12 males; 3 females; age: 23.8 years [SD 1.80]; height: 1.79 m [SD0.07], body mass: 78.4 kg [SD 9.6]). Five participants were beginner gym-goers, 5 were experienced gym-goers, and 5 were qualified and practicing S&C coaches. IMU data were first collected from each participant to create individualized exercise classifiers for them. They then completed a number of non exercise-related tasks with the app. Following this, a workout was completed using the system, involving squats, dead lifts, lunges, and single-leg squats. Participants were then interviewed about their user experience and completed the System Usability Scale (SUS) and the user version of the Mobile Application Rating Scale (uMARS). Thematic analysis was completed on all interview transcripts, and survey results were analyzed. Results: Qualitative and quantitative analysis found the system has good to excellent usability. The system achieved a mean (SD) SUS usability score of 79.2 (8.8). Functionality was also deemed to be good, with many users reporting positively on the systems repetition counting, technique classification, and feedback. A number of bugs were found, and other suggested changes to the system were also made. The overall subjective quality of the app was good, with a median star rating of 4 out of 5 (interquartile range, IQR: 3-5). Participants also reported that the system would aid their technique, provide motivation, reassure them, and help them avoid injury. Conclusions: This study demonstrated an overall positive evaluation of Formulift in the categories of usability, functionality, perceived impact, and subjective quality. Users also suggested a number of changes for future iterations of the system. These findings are the first of their kind and show great promise for wearable sensor-based exercise biofeedback systems.en_US
dc.description.sponsorshipIrish Research Councilen_US
dc.description.sponsorshipScience Foundation Irelanden_US
dc.language.isoenen_US
dc.publisherJMIR Publicationsen_US
dc.subjectmHealthen_US
dc.subjectFeedbacken_US
dc.subjectPostureen_US
dc.subjectExercise therapyen_US
dc.subjectBiomedical technologyen_US
dc.subjectLower extremityen_US
dc.subjectPhysical therapy specialtyen_US
dc.titleA Wearable Sensor-Based Exercise Biofeedback System: Mixed Methods Evaluation of Formuliften_US
dc.typeJournal Articleen_US
dc.statusPeer revieweden_US
dc.identifier.volume6en_US
dc.identifier.issue1en_US
dc.identifier.startpagee33en_US
dc.identifier.doi10.2196/mhealth.8115-
dc.neeo.contributorO'Reilly|Martin|aut|-
dc.neeo.contributorSlevin|Patrick|aut|-
dc.neeo.contributorWard|Tomás|aut|-
dc.neeo.contributorCaulfield|Brian|aut|-
dc.date.updated2018-02-26T11:03:41Z-
dc.rights.licensehttps://creativecommons.org/licenses/by-nc-nd/3.0/ie/en
item.grantfulltextopen-
item.fulltextWith Fulltext-
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