{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,27]],"date-time":"2026-08-27T16:35:47Z","timestamp":1787848547055,"version":"build-2784847793"},"reference-count":52,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,7,21]],"date-time":"2026-07-21T00:00:00Z","timestamp":1784592000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Bioeng. Biotechnol."],"abstract":"<jats:sec>\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>The development of a low-cost system for analysis of the hammer throw technique is presented. The system is based on analyzing the information provided by off-the-shelf inertial measurement units (IMUs).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Five Spanish national-level hammer throwers (2 women, 3 men) performed 6 trials with homologated implements (4\u00a0kg for women, 7.26\u00a0kg for men) at the High-Performance Sports Centre (CAR) in Madrid during regular training sessions. The IMUs were positioned at three points on the thrower\u2019s body: right instep, lumbar zone, and wrist. All IMU raw data (angular velocities, linear accelerations, and Euler angles) were processed and visualized using Matlab software to analyze and derive additional parameters.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>After analyzing the patterns of the raw data provided by the IMUs with professional coaches, algorithms for determining the duration of the single and double support phases for each turn were developed and described in the paper. These raw data also allow us to derive additional biomechanical parameters that help characterize the quality of the athlete\u2019s throwing technique (wrist angular velocity and linear acceleration, pelvic tilt, horizontal azimuthal angles, arm elevation angles, and vertical foot acceleration). Validation against a VICON motion capture system showed excellent agreement for phase durations (ICC = 0.977) and angular displacements (ICC = 0.976).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Discussion<\/jats:title>\n                    <jats:p>The data obtained using IMUs represent only a subset of the information that can be obtained from a hammer throw using current 3D photogrammetry techniques. However, as the hammer throw is a rotatory movement, a valuable information according to the literature can be obtained from IMUs at very low cost and without access to specialized high-performance centers or biomechanics laboratories. These findings demonstrate that an IMU-based framework constitutes a reliable low-cost solution for coaches and athletes who can benefit from this technology in their regular training sessions.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3389\/fbioe.2026.1800086","type":"journal-article","created":{"date-parts":[[2026,7,21]],"date-time":"2026-07-21T05:36:21Z","timestamp":1784612181000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":1,"title":["A wearable IMU-based method for measuring biomechanical parameters in hammer throwing"],"prefix":"10.3389","volume":"14","author":[{"given":"Jos\u00e9","family":"S\u00e1nchez-Moreno","sequence":"first","affiliation":[{"name":"Department of Computer Sciences and Automatic Control, Universidad Nacional de Educaci\u00f3n a Distancia (UNED)","place":["Madrid, Spain"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David","family":"Moreno-Salinas","sequence":"additional","affiliation":[{"name":"Department of Computer Sciences and Automatic Control, Universidad Nacional de Educaci\u00f3n a Distancia (UNED)","place":["Madrid, Spain"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carlos","family":"Revuelta-Parra","sequence":"additional","affiliation":[{"name":"Department of Sports Sciences, Faculty of Medicine, Health and Sports, Universidad Europea de Madrid (UEM)","place":["Madrid, Spain"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Juan Carlos","family":"\u00c1lvarez-Ortiz","sequence":"additional","affiliation":[{"name":"Federaci\u00f3n Espa\u00f1ola de Atletismo (RFEA)","place":["Pozuelo de Alarc\u00f3n, Spain"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2026,7,21]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"1332","DOI":"10.1177\/17479541211003064","article-title":"The use of inertial measurement units for analyzing change of direction movement in sports: a scoping review","volume":"16","author":"Alanen","year":"2021","journal-title":"Int. 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