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Recently, devices using Bluetooth that are portable because of their small size have been developed to allow real-time measurements and recording. This study investigated the concurrent validity and intra-trial reliability of a recently developed Bluetooth-embedded inertial measurement unit. Thirty-seven healthy, young adult participants (age = 22.1\u00b11.2 years, height = 166.8\u00b11.6 cm, mass = 61.9\u00b112.3 kg) were included in the study. The knee extension angles during active knee extension were measured for validity, using both the Bluetooth-embedded inertial measurement unit and the standard goniometer. Intra-trial reliability was tested for consistency during repeated measurements. The intra-class correlation coefficients value for the concurrent validity between the Bluetooth-embedded inertial measurement unit and standard goniometer was 0.991, and the values for the intra-trial reliability of the two devices were 0.973 and 0.963, respectively. Based on its high validity and reliability, the Bluetooth-embedded device may be useful for evaluating functional impairment and exercise performance ability by real-time measurements of joint ranges of motion in clinical rehabilitation or sports fields.<\/jats:p>","DOI":"10.2478\/ijcss-2019-0015","type":"journal-article","created":{"date-parts":[[2019,12,17]],"date-time":"2019-12-17T04:32:04Z","timestamp":1576557124000},"page":"1-11","source":"Crossref","is-referenced-by-count":18,"title":["Concurrent validity and intra-trial reliability of a bluetooth-embedded inertial measurement unit for real-time joint range of motion"],"prefix":"10.2478","volume":"18","author":[{"given":"D.","family":"Oh","sequence":"first","affiliation":[{"name":"Department of Health and Rehabilitation , Woosong University , Daejeon , Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"W.","family":"Lim","sequence":"additional","affiliation":[{"name":"Department of Physical therapy , Woosong University , Daejeon , Republic of Korea"},{"name":"Woosong Institute of Rehabilitation Science , Daejeon , Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"N.","family":"Lee","sequence":"additional","affiliation":[{"name":"Chungnam National University Hospital , Daejeon , Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"374","published-online":{"date-parts":[[2019,12,16]]},"reference":[{"key":"2026051105170256263_j_ijcss-2019-0015_ref_001_w2aab3b7ab1b6b1ab1ab1Aa","doi-asserted-by":"crossref","unstructured":"Al-Amri, M., Nicholas, K., Button, K., Sparkes, V., Sheeran, L., & Davies, J. 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