{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,14]],"date-time":"2026-07-14T09:08:02Z","timestamp":1784020082872,"version":"3.55.0"},"reference-count":58,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2024,1,26]],"date-time":"2024-01-26T00:00:00Z","timestamp":1706227200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001665","name":"French National Research Agency","doi-asserted-by":"publisher","award":["ANR-10-AIRT-05"],"award-info":[{"award-number":["ANR-10-AIRT-05"]}],"id":[{"id":"10.13039\/501100001665","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001665","name":"French National Research Agency","doi-asserted-by":"publisher","award":["ANR-15-IDEX-02"],"award-info":[{"award-number":["ANR-15-IDEX-02"]}],"id":[{"id":"10.13039\/501100001665","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001665","name":"French National Research Agency","doi-asserted-by":"publisher","award":["ANR-19-P3IA-0003"],"award-info":[{"award-number":["ANR-19-P3IA-0003"]}],"id":[{"id":"10.13039\/501100001665","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001665","name":"French National Research Agency","doi-asserted-by":"publisher","award":["1472455"],"award-info":[{"award-number":["1472455"]}],"id":[{"id":"10.13039\/501100001665","id-type":"DOI","asserted-by":"publisher"}]},{"name":"MIAI @ Grenoble Alpes","award":["ANR-10-AIRT-05"],"award-info":[{"award-number":["ANR-10-AIRT-05"]}]},{"name":"MIAI @ Grenoble Alpes","award":["ANR-15-IDEX-02"],"award-info":[{"award-number":["ANR-15-IDEX-02"]}]},{"name":"MIAI @ Grenoble Alpes","award":["ANR-19-P3IA-0003"],"award-info":[{"award-number":["ANR-19-P3IA-0003"]}]},{"name":"MIAI @ Grenoble Alpes","award":["1472455"],"award-info":[{"award-number":["1472455"]}]},{"name":"Doctoral Bursary from Sapienza University of Rome","award":["ANR-10-AIRT-05"],"award-info":[{"award-number":["ANR-10-AIRT-05"]}]},{"name":"Doctoral Bursary from Sapienza University of Rome","award":["ANR-15-IDEX-02"],"award-info":[{"award-number":["ANR-15-IDEX-02"]}]},{"name":"Doctoral Bursary from Sapienza University of Rome","award":["ANR-19-P3IA-0003"],"award-info":[{"award-number":["ANR-19-P3IA-0003"]}]},{"name":"Doctoral Bursary from Sapienza University of Rome","award":["1472455"],"award-info":[{"award-number":["1472455"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Over recent decades, wearable inertial sensors have become popular means to quantify physical activity and mobility. However, research assessing measurement accuracy and precision is required, especially before using device-based measures as outcomes in trials. The GT9X Link is a recent activity monitor available from ActiGraph, recognized as a \u201cgold standard\u201d and previously used as a criterion measure to assess the validity of various consumer-based activity monitors. However, the validity of the ActiGraph GT9X Link is not fully elucidated. A systematic review was undertaken to synthesize the current evidence for the criterion validity of the ActiGraph GT9X Link in measuring steps and energy expenditure. This review followed the PRISMA guidelines and eight studies were included with a combined sample size of 558 participants. We found that (1) the ActiGraph GT9X Link generally underestimates steps; (2) the validity and accuracy of the device in measuring steps seem to be influenced by gait speed, device placement, filtering process, and monitoring conditions; and (3) there is a lack of evidence regarding the accuracy of step counting in free-living conditions and regarding energy expenditure estimation. Given the limited number of included studies and their heterogeneity, the present review emphasizes the need for further validation studies of the ActiGraph GT9X Link in various populations and in both controlled and free-living settings.<\/jats:p>","DOI":"10.3390\/s24030825","type":"journal-article","created":{"date-parts":[[2024,1,30]],"date-time":"2024-01-30T12:06:58Z","timestamp":1706616418000},"page":"825","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["Current Knowledge about ActiGraph GT9X Link Activity Monitor Accuracy and Validity in Measuring Steps and Energy Expenditure: A Systematic Review"],"prefix":"10.3390","volume":"24","author":[{"given":"Quentin","family":"Suau","sequence":"first","affiliation":[{"name":"AGEIS, Universit\u00e9 Grenoble Alpes, 38000 Grenoble, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7955-3369","authenticated-orcid":false,"given":"Edoardo","family":"Bianchini","sequence":"additional","affiliation":[{"name":"AGEIS, Universit\u00e9 Grenoble Alpes, 38000 Grenoble, France"},{"name":"Department of Neuroscience, Mental Health and Sensory Organs (NESMOS), Sapienza University of Rome, 00189 Rome, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexandre","family":"Bellier","sequence":"additional","affiliation":[{"name":"AGEIS, Universit\u00e9 Grenoble Alpes, 38000 Grenoble, France"},{"name":"CHU Grenoble Alpes, Universit\u00e9 Grenoble Alpes, Inserm CIC 1406, 38000 Grenoble, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9806-0639","authenticated-orcid":false,"given":"Matthias","family":"Chardon","sequence":"additional","affiliation":[{"name":"AGEIS, Universit\u00e9 Grenoble Alpes, 38000 Grenoble, France"},{"name":"UNESP Human Movement Research Laboratory (MOVI-LAB), Department of Physical Education, Bauru Sao Paulo State University, Bauru 17033-360, SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tracy","family":"Milane","sequence":"additional","affiliation":[{"name":"AGEIS, Universit\u00e9 Grenoble Alpes, 38000 Grenoble, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4813-3868","authenticated-orcid":false,"given":"Clint","family":"Hansen","sequence":"additional","affiliation":[{"name":"AGEIS, Universit\u00e9 Grenoble Alpes, 38000 Grenoble, France"},{"name":"Department of Neurology, Kiel University, 24105 Kiel, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3773-393X","authenticated-orcid":false,"given":"Nicolas","family":"Vuillerme","sequence":"additional","affiliation":[{"name":"AGEIS, Universit\u00e9 Grenoble Alpes, 38000 Grenoble, France"},{"name":"LabCom Telecom4Health, Orange Labs & Universit\u00e9 Grenoble Alpes, CNRS, Inria, Grenoble INP-UGA, 38000 Grenoble, France"},{"name":"Institut Universitaire de France, 75005 Paris, France"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,1,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"123","DOI":"10.7326\/M14-1651","article-title":"Sedentary time and its association with risk for disease incidence, mortality, and hospitalization in adults: A systematic review and meta-analysis","volume":"162","author":"Biswas","year":"2015","journal-title":"Ann. Intern. Med."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"39","DOI":"10.1186\/1479-5868-7-39","article-title":"A systematic review of the evidence for Canada\u2019s Physical Activity Guidelines for Adults","volume":"7","author":"Warburton","year":"2010","journal-title":"Int. J. Behav. Nutr. Phys. Act."},{"key":"ref_3","unstructured":"Office of the Surgeon General (US) (2015). Publications and Reports of the Surgeon General, US Department of Health and Human Services."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1139","DOI":"10.1001\/jamainternmed.2022.4000","article-title":"Prospective Associations of Daily Step Counts and Intensity with Cancer and Cardiovascular Disease Incidence and Mortality and All-Cause Mortality","volume":"182","author":"Ahmadi","year":"2022","journal-title":"JAMA Intern. Med."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1059","DOI":"10.1001\/jamaneurol.2022.2672","article-title":"Association of Daily Step Count and Intensity with Incident Dementia in 78,430 Adults Living in the UK","volume":"79","author":"Ahmadi","year":"2022","journal-title":"JAMA Neurol."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"e235174","DOI":"10.1001\/jamanetworkopen.2023.5174","article-title":"Association of Daily Step Patterns with Mortality in US Adults","volume":"6","author":"Inoue","year":"2023","journal-title":"JAMA Netw. Open"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1105","DOI":"10.1001\/jamainternmed.2019.0899","article-title":"Association of Step Volume and Intensity with All-Cause Mortality in Older Women","volume":"179","author":"Lee","year":"2019","journal-title":"JAMA Intern. Med."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"e219","DOI":"10.1016\/S2468-2667(21)00302-9","article-title":"Daily steps and all-cause mortality: A meta-analysis of 15 international cohorts","volume":"7","author":"Paluch","year":"2022","journal-title":"Lancet Public Health"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"1151","DOI":"10.1001\/jama.2020.1382","article-title":"Association of Daily Step Count and Step Intensity with Mortality Among US Adults","volume":"323","author":"Troiano","year":"2020","journal-title":"JAMA"},{"key":"ref_10","unstructured":"WHO (2020). WHO Guidelines Approved by the Guidelines Review Committee, World Health Organization."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"80","DOI":"10.1186\/1479-5868-8-80","article-title":"How many steps\/day are enough? For older adults and special populations","volume":"8","author":"Craig","year":"2011","journal-title":"Int. J. Behav. Nutr. Phys. Act."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1384","DOI":"10.1249\/MSS.0b013e318199885c","article-title":"Accelerometer-determined steps per day in US adults","volume":"41","author":"Johnson","year":"2009","journal-title":"Med. Sci. Sports Exerc."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"129","DOI":"10.1186\/s12966-020-01020-8","article-title":"The effects of step-count monitoring interventions on physical activity: Systematic review and meta-analysis of community-based randomised controlled trials in adults","volume":"17","author":"Chaudhry","year":"2020","journal-title":"Int. J. Behav. Nutr. Phys. Act."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"163","DOI":"10.1007\/s40520-018-0960-7","article-title":"Self-monitoring to increase physical activity in patients with cardiovascular disease: A systematic review and meta-analysis","volume":"31","author":"Kanejima","year":"2019","journal-title":"Aging. Clin. Exp. Res."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"1821","DOI":"10.1007\/s40279-017-0716-0","article-title":"Accelerometer Data Collection and Processing Criteria to Assess Physical Activity and Other Outcomes: A Systematic Review and Practical Considerations","volume":"47","author":"Migueles","year":"2017","journal-title":"Sports Med."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"112","DOI":"10.1186\/s12984-022-01085-5","article-title":"Criterion validity of ActiGraph monitoring devices for step counting and distance measurement in adults and older adults: A systematic review","volume":"19","author":"Ngueleu","year":"2022","journal-title":"J. Neuroeng. Rehabil."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Kwon, S., Wan, N., Burns, R.D., Brusseau, T.A., Kim, Y., Kumar, S., Ertin, E., Wetter, D.W., Lam, C.Y., and Wen, M. (2021). The Validity of MotionSense HRV in Estimating Sedentary Behavior and Physical Activity under Free-Living and Simulated Activity Settings. Sensors, 21.","DOI":"10.3390\/s21041411"},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Shah, V.V., Brumbach, B.H., Pearson, S., Vasilyev, P., King, E., Carlson-Kuhta, P., Mancini, M., Horak, F.B., Sowalsky, K., and McNames, J. (2023). Opal Actigraphy (Activity and Sleep) Measures Compared to ActiGraph: A Validation Study. Sensors, 23.","DOI":"10.3390\/s23042296"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1315","DOI":"10.1249\/MSS.0000000000001569","article-title":"Video-Recorded Validation of Wearable Step Counters under Free-living Conditions","volume":"50","author":"Toth","year":"2018","journal-title":"Med. Sci. Sports Exerc."},{"key":"ref_20","first-page":"e000172","article-title":"Free-Living Validation and Harmonization of 10 Wearable Step Count Monitors","volume":"6","author":"Park","year":"2021","journal-title":"Transl. J. Am. Coll. Sports Med."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"n71","DOI":"10.1136\/bmj.n71","article-title":"The PRISMA 2020 statement: An updated guideline for reporting systematic reviews","volume":"372","author":"Page","year":"2021","journal-title":"BMJ"},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Higgins, J.P.T., and Thomas, J. (2019). Cochrane Handbook for Systematic Reviews of Interventions, Wiley-Blackwell. [2nd ed.].","DOI":"10.1002\/9781119536604"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"e35626","DOI":"10.2196\/35626","article-title":"Accuracy and Precision of Energy Expenditure, Heart Rate, and Steps Measured by Combined-Sensing Fitbits Against Reference Measures: Systematic Review and Meta-analysis","volume":"10","author":"Chevance","year":"2022","journal-title":"JMIR Mhealth Uhealth"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"e10527","DOI":"10.2196\/10527","article-title":"Accuracy of Fitbit Devices: Systematic Review and Narrative Syntheses of Quantitative Data","volume":"6","author":"Feehan","year":"2018","journal-title":"JMIR Mhealth Uhealth"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"e18694","DOI":"10.2196\/18694","article-title":"Reliability and Validity of Commercially Available Wearable Devices for Measuring Steps, Energy Expenditure, and Heart Rate: Systematic Review","volume":"8","author":"Fuller","year":"2020","journal-title":"JMIR Mhealth Uhealth"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"165","DOI":"10.1016\/j.gaitpost.2022.08.002","article-title":"Validity of the activPAL monitor to measure stepping activity and activity intensity: A systematic review","volume":"97","author":"Wu","year":"2022","journal-title":"Gait Posture"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"107","DOI":"10.1016\/j.gaitpost.2022.03.002","article-title":"Validity of the ActivPAL monitor to distinguish postures: A systematic review","volume":"94","author":"Wu","year":"2022","journal-title":"Gait Posture"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"S29","DOI":"10.1123\/jpah.9.s1.s29","article-title":"A checklist for evaluating the methodological quality of validation studies on self-report instruments for physical activity and sedentary behavior","volume":"9","author":"Ainsworth","year":"2012","journal-title":"J. Phys. Act. Health"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"377","DOI":"10.1136\/jech.52.6.377","article-title":"The feasibility of creating a checklist for the assessment of the methodological quality both of randomised and non-randomised studies of health care interventions","volume":"52","author":"Downs","year":"1998","journal-title":"J. Epidemiol. Community. Health"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"1455","DOI":"10.1249\/01.MSS.0000078932.61440.A2","article-title":"Validity of 10 electronic pedometers for measuring steps, distance, and energy cost","volume":"35","author":"Crouter","year":"2003","journal-title":"Med. Sci. Sports Exerc."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"1779","DOI":"10.1249\/01.MSS.0000089342.96098.C4","article-title":"Accuracy and reliability of 10 pedometers for measuring steps over a 400-m walk","volume":"35","author":"Schneider","year":"2003","journal-title":"Med. Sci. Sports Exerc."},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Campbell, M.J. (2021). Statistics at Square One, Wiley-Blackwell. [12th ed.].","DOI":"10.1002\/9781119402350"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"137","DOI":"10.1080\/09593985.2021.1996498","article-title":"Validity and reliability of physical activity measures in multiple sclerosis","volume":"39","author":"Anens","year":"2023","journal-title":"Physiother Theory Pr."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"66","DOI":"10.1038\/s41746-018-0073-x","article-title":"Clinical validation of smartphone-based activity tracking in peripheral artery disease patients","volume":"1","author":"Ata","year":"2018","journal-title":"NPJ Digit. Med."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"e7973","DOI":"10.7717\/peerj.7973","article-title":"Correction of estimation bias of predictive equations of energy expenditure based on wrist\/waist-mounted accelerometers","volume":"7","author":"Ho","year":"2019","journal-title":"PeerJ"},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"John, D., Morton, A., Arguello, D., Lyden, K., and Bassett, D. (2018). \u201cWhat Is a Step?\u201d Differences in How a Step Is Detected among Three Popular Activity Monitors That Have Impacted Physical Activity Research. Sensors, 18.","DOI":"10.3390\/s18041206"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"197","DOI":"10.1123\/jmpb.2019-0055","article-title":"Step-Counting Validity of Wrist-Worn Activity Monitors During Activities with Fixed Upper Extremities","volume":"3","author":"Lynn","year":"2020","journal-title":"J. Meas. Phys. Behav."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"117","DOI":"10.1186\/s12966-022-01350-9","article-title":"A catalog of validity indices for step counting wearable technologies during treadmill walking: The CADENCE-adults study","volume":"19","author":"Gould","year":"2022","journal-title":"Int. J. Behav. Nutr. Phys. Act."},{"key":"ref_39","doi-asserted-by":"crossref","unstructured":"Tedesco, S., Sica, M., Ancillao, A., Timmons, S., Barton, J., and O\u2019Flynn, B. (2019). Accuracy of consumer-level and research-grade activity trackers in ambulatory settings in older adults. PLoS ONE, 14.","DOI":"10.1371\/journal.pone.0216891"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"362","DOI":"10.1152\/japplphysiol.00628.2015","article-title":"Sampling frequency affects the processing of Actigraph raw acceleration data to activity counts","volume":"120","author":"Arvidsson","year":"2016","journal-title":"J. Appl. Physiol."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"377","DOI":"10.1123\/japa.2014-0033","article-title":"Effect of ActiGraph GT3X+ Position and Algorithm Choice on Step Count Accuracy in Older Adults","volume":"23","author":"Korpan","year":"2015","journal-title":"J. Aging Phys. Act."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"696968","DOI":"10.3389\/fmed.2021.696968","article-title":"Comparison of Energy Expenditure Assessed Using Wrist- and Hip-Worn ActiGraph GT3X in Free-Living Conditions in Young and Older Adults","volume":"8","author":"Guediri","year":"2021","journal-title":"Front Med."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"252","DOI":"10.3389\/fmed.2019.00252","article-title":"Comparison of Step Count Assessed Using Wrist- and Hip-Worn Actigraph GT3X in Free-Living Conditions in Young and Older Adults","volume":"6","author":"Mandigout","year":"2019","journal-title":"Front Med."},{"key":"ref_44","doi-asserted-by":"crossref","unstructured":"O\u2019Connell, S., \u00d3Laighin, G., and Quinlan, L.R. (2017). When a Step Is Not a Step! Specificity Analysis of Five Physical Activity Monitors. PLoS ONE, 12.","DOI":"10.1371\/journal.pone.0169616"},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"355","DOI":"10.2522\/ptj.20140611","article-title":"\u201cStepping Up\u201d Activity Poststroke: Ankle-Positioned Accelerometer Can Accurately Record Steps During Slow Walking","volume":"96","author":"Klassen","year":"2016","journal-title":"Phys. Ther."},{"key":"ref_46","doi-asserted-by":"crossref","unstructured":"Bezuidenhout, L., Thurston, C., Hagstr\u00f6mer, M., and Moulaee Conradsson, D. (2021). Validity of Hip and Ankle Worn Actigraph Accelerometers for Measuring Steps as a Function of Gait Speed during Steady State Walking and Continuous Turning. Sensors, 21.","DOI":"10.3390\/s21093154"},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"752","DOI":"10.1038\/s41598-020-80768-2","article-title":"Gait parameters of Parkinson\u2019s disease compared with healthy controls: A systematic review and meta-analysis","volume":"11","author":"Zanardi","year":"2021","journal-title":"Sci. Rep."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"989622","DOI":"10.3389\/fneur.2022.989622","article-title":"Walking speed at the acute and subacute stroke stage: A descriptive meta-analysis","volume":"13","author":"Delafontaine","year":"2022","journal-title":"Front Neurol."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"1033","DOI":"10.1111\/obr.12848","article-title":"A systematic review on biomechanical characteristics of walking in children and adolescents with overweight\/obesity: Possible implications for the development of musculoskeletal disorders","volume":"20","author":"Migueles","year":"2019","journal-title":"Obes. Rev."},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"301","DOI":"10.70252\/ZFZP6856","article-title":"Biomechanical Effects of Obesity on Balance","volume":"5","author":"Pechak","year":"2012","journal-title":"Int. J. Exerc. Sci."},{"key":"ref_51","doi-asserted-by":"crossref","unstructured":"Steinberg, N., Nemet, D., Pantanowitz, M., and Eliakim, A. (2018). Gait Pattern, Impact to the Skeleton and Postural Balance in Overweight and Obese Children: A Review. Sports, 6.","DOI":"10.3390\/sports6030075"},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"112102","DOI":"10.1016\/j.exger.2023.112102","article-title":"Age-related changes in gait biomechanics and their impact on the metabolic cost of walking: Report from a National Institute on Aging workshop","volume":"173","author":"Boyer","year":"2023","journal-title":"Exp. Gerontol."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"015001","DOI":"10.1088\/1361-6579\/ab635f","article-title":"Validity of smartphones and activity trackers to measure steps in a free-living setting over three consecutive days","volume":"41","author":"Knaier","year":"2020","journal-title":"Physiol. Meas."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"451","DOI":"10.1123\/japa.2015-0234","article-title":"Comparison of ActiGraph GT3X+ and StepWatch Step Count Accuracy in Geriatric Rehabilitation Patients","volume":"24","author":"Webber","year":"2016","journal-title":"J. Aging Phys. Act."},{"key":"ref_55","doi-asserted-by":"crossref","unstructured":"Feito, Y., Hornbuckle, L.M., Reid, L.A., and Crouter, S.E. (2017). Effect of ActiGraph\u2019s low frequency extension for estimating steps and physical activity intensity. PLoS ONE, 12.","DOI":"10.1371\/journal.pone.0188242"},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"780","DOI":"10.1136\/bjsports-2020-103147","article-title":"Recommendations for determining the validity of consumer wearable and smartphone step count: Expert statement and checklist of the INTERLIVE network","volume":"55","author":"Johnston","year":"2021","journal-title":"Br. J. Sports Med."},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"145","DOI":"10.1123\/jpah.2015-0203","article-title":"Validity of Activity Monitor Step Detection Is Related to Movement Patterns","volume":"13","author":"Hickey","year":"2016","journal-title":"J. Phys. Act. Health"},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"291","DOI":"10.1016\/j.jsams.2017.07.022","article-title":"Validity of the ActiGraph GT3X+ and BodyMedia SenseWear Armband to estimate energy expenditure during physical activity and sport","volume":"21","author":"Gastin","year":"2018","journal-title":"J. Sci. Med. 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