{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,20]],"date-time":"2026-07-20T11:38:51Z","timestamp":1784547531234,"version":"3.55.0"},"reference-count":33,"publisher":"SAGE Publications","issue":"3","license":[{"start":{"date-parts":[[2025,11,17]],"date-time":"2025-11-17T00:00:00Z","timestamp":1763337600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Journal of Back and Musculoskeletal Rehabilitation"],"published-print":{"date-parts":[[2026,5]]},"abstract":"<jats:sec>\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>Reduced ankle dorsiflexion range of motion (ADROM) is a risk factor for lower extremity injuries, and weight-bearing measurements are known to better reflect functional movement. This study aimed to determine the concurrent validity and the intra- and inter-rater reliability of a smartphone application (SA, The Angle Meter app) for measuring ADROM during the weight-bearing lunge test (WBLT).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      A reliability and validity study was conducted involving 57 participants. Three raters (two experienced and one novice) assessed ADROM using the SA in two separate sessions, in a randomized order. All measurements were concurrently recorded on video, and a two-dimensional video analysis (Kinovea software) was used as the reference standard. A total of 342 measurements were analyzed for concurrent validity, 114 for inter-rater reliability, and 57 for intra-rater reliability. Pearson's correlation coefficient (r), intraclass correlation coefficient (ICC 2,1), standard error of the estimate (SEE), Bland-Altman analysis, standard error of measurement (SEM), and minimum detectable change at 95% confidence (MDC\n                      <jats:sub>95<\/jats:sub>\n                      ) were used for analysis.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      The SA demonstrated excellent concurrent validity (r\u2009=\u20090.98; SEE\u2009=\u20090.92\u00b0; ICC\u2009=\u20090.977; 95% CI: 0.966\u20130.983), with limits of agreement from \u22121.80\u00b0 to 1.47\u00b0. Intra-rater reliability was high across all raters (ICC range: 0.83\u20130.86), including the novice. Inter-rater reliability was also good (ICC\u2009=\u20090.846; SEM\u2009=\u20091.65\u00b0; MDC\n                      <jats:sub>95<\/jats:sub>\n                      \u2009=\u20094.57\u00b0).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>The Angle Meter app is a valid, reliable, and practical tool for assessing ADROM during WBLT, even when used by novice raters.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/10538127251395837","type":"journal-article","created":{"date-parts":[[2025,11,17]],"date-time":"2025-11-17T18:36:52Z","timestamp":1763404612000},"page":"835-843","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["Concurrent validity and reliability of a smartphone app for assessing weight-bearing ankle dorsiflexion using 2D video analysis"],"prefix":"10.1177","volume":"39","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3236-1567","authenticated-orcid":false,"given":"Mehmet Ercan","family":"Odaba\u015f\u0131o\u011flu","sequence":"first","affiliation":[{"name":"Kilis 7 Aral\u0131k University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3954-2301","authenticated-orcid":false,"given":"Zeynettin","family":"Kas\u0131rga","sequence":"additional","affiliation":[{"name":"Kilis 7 Aral\u0131k University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-0033-6053","authenticated-orcid":false,"given":"Aysun G\u00fcler","family":"Kanter","sequence":"additional","affiliation":[{"name":"School of Physical Education and Sports, Department of Coach Education, Kilis 7 Aral\u0131k University, Kilis, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2025,11,17]]},"reference":[{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.1038\/s41598-023-48344-6"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.1097\/PHM.0000000000000221"},{"key":"e_1_3_3_4_2","doi-asserted-by":"publisher","DOI":"10.1186\/s13047-018-0286-x"},{"key":"e_1_3_3_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.math.2012.08.007"},{"key":"e_1_3_3_6_2","doi-asserted-by":"publisher","DOI":"10.4085\/1062-6050-49.3.29"},{"key":"e_1_3_3_7_2","doi-asserted-by":"publisher","DOI":"10.18176\/archmeddeporte.00108"},{"key":"e_1_3_3_8_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.bjpt.2017.03.012"},{"key":"e_1_3_3_9_2","doi-asserted-by":"publisher","DOI":"10.1053\/j.jfas.2017.05.008"},{"key":"e_1_3_3_10_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jsams.2007.06.009"},{"key":"e_1_3_3_11_2","first-page":"197","article-title":"The validity and reliability of a new instrumented device for measuring ankle dors\u0131flex\u0131on range of motion","volume":"10","author":"Calatayud J","year":"2015","unstructured":"Calatayud J, Martin F, Gargallo P, et al. 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