{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T01:26:46Z","timestamp":1760232406915,"version":"build-2065373602"},"reference-count":46,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2022,11,7]],"date-time":"2022-11-07T00:00:00Z","timestamp":1667779200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Government of Extremadura (Employment and Infrastructure office\u2014Consejer\u00eda de Empleo e Infraestructuras)","award":["GR21149"],"award-info":[{"award-number":["GR21149"]}]},{"name":"European Regional Development Fund (ERDF)","award":["GR21149"],"award-info":[{"award-number":["GR21149"]}]},{"name":"National University of Costa Rica Research","award":["GR21149"],"award-info":[{"award-number":["GR21149"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>Background: Previous studies indicate that running at maximum speed on short or curved sections is slower than running on straight sections. This study aimed to analyse the external load symmetry in track running kinematics concerning body location (left vs. right, caudal vs. cephalic), track segment (straight vs. curved) and distance (150 m vs. 300 m). Methods: Twenty experienced athletes ran 150 m and 300 m on an official athletic track and were monitored by Magnetic, Angular Rate and Gravity sensors attached to six different body segments (thorax, lumbar, knees and malleolus). Player Load was quantified as a valid, effective and representative Accelerometery-based variable. Results: (1) Principal component analysis explained 62\u201393% of the total variance and clustered body locations relevance in curved (knees and malleolus) vs. straight (lumbar, knees, malleolus) running segments; (2) Player Load statistical differences by track segment (curved vs. straight) were found in all body locations; and (3) there were no differences in bilateral symmetries by distance or running segment. Conclusions: Track segment and body location directly impacted accelerometery-based load. Acceleration in straight segments was lower compared to that in curved segments in all the body locations (lumbar, knee and ankle), except in the thorax. Strength and conditioning programs should consider the singularity of curved sprinting (effects of centripetal\u2013centrifugal force) for performance enhancement and injury prevention and focus on the knees and malleolus, as shown in the principal component analysis results.<\/jats:p>","DOI":"10.3390\/sym14112332","type":"journal-article","created":{"date-parts":[[2022,11,7]],"date-time":"2022-11-07T03:10:46Z","timestamp":1667790646000},"page":"2332","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Accelerometery-Based Load Symmetry in Track Running Kinematics concerning Body Location, Track Segment, and Distance in Amateur Runners"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7451-4448","authenticated-orcid":false,"given":"Antonio","family":"Ant\u00fanez","sequence":"first","affiliation":[{"name":"Research Group in Optimisation of Training and Sports Performance (GOERD), University of Extremadura, Av. De la Universidad, s\/n, 10005 C\u00e1ceres, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0717-8827","authenticated-orcid":false,"given":"Daniel","family":"Rojas-Valverde","sequence":"additional","affiliation":[{"name":"N\u00facleo de Estudios para el Alto Rendimiento y la Salud (NARS-CIDISAD), Escuela Ciencia del Movimiento humano y calidad de Vida (CIEMHCAVI), Universidad Nacional, Heredia 863000, Costa Rica"},{"name":"Cl\u00ednica de Lesiones Deportivas (Rehab & Readapt), Escuela Ciencia del Movimiento Humano y Calidad de Vida (CIEMHCAVI), Universidad Nacional, Heredia 863000, Costa Rica"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ana","family":"Flores-Leon\u00e9s","sequence":"additional","affiliation":[{"name":"Research Group in Optimisation of Training and Sports Performance (GOERD), University of Extremadura, Av. De la Universidad, s\/n, 10005 C\u00e1ceres, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4084-8124","authenticated-orcid":false,"given":"Carlos D.","family":"G\u00f3mez-Carmona","sequence":"additional","affiliation":[{"name":"Research Group in Optimisation of Training and Sports Performance (GOERD), University of Extremadura, Av. De la Universidad, s\/n, 10005 C\u00e1ceres, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6009-4086","authenticated-orcid":false,"given":"Sergio J.","family":"Ib\u00e1\u00f1ez","sequence":"additional","affiliation":[{"name":"Research Group in Optimisation of Training and Sports Performance (GOERD), University of Extremadura, Av. De la Universidad, s\/n, 10005 C\u00e1ceres, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,11,7]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1785","DOI":"10.1249\/01.mss.0000181676.62054.79","article-title":"Are There Limits to Running World Records?","volume":"37","author":"Nevill","year":"2005","journal-title":"Med. Sci. Sports Exerc."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1194","DOI":"10.1249\/01.mss.0000222849.12133.02","article-title":"Projection of World Running Records","volume":"38","author":"Whipp","year":"2006","journal-title":"Med. Sci. Sports Exerc."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1955","DOI":"10.1152\/japplphysiol.00921.2002","article-title":"High-Speed Running Performance: A New Approach to Assessment and Prediction","volume":"95","author":"Bundle","year":"2003","journal-title":"J. Appl. 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