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The 15\u2005mpa#nbsp;-meter turning time improved over the intervention period for all turns (p\u2009&lt;\u20090.01), with reductions of 5.3, 5.1, 4.9 and 4.8% for the somersault, open, crossover and bucket techniques. The highest improvement in mean time spent between pre- and post-intervention was found for the rotation phase (p\u2009&lt;\u20090.01; 12.3\u201317.9%) and the fastest rotation of post-intervention was for the open turn (1.24\u2009\u00b1\u20090.10 seconds). There were no observed differences in the wall contact phase across all turn groups. Four-week intervention program can assist learning and improving of backstroke to breaststroke turning techniques particularly in rotation phase. Findings suggest that the preferred turn technique is not always the better to be used and that age-group swimmers are able to optimize their turning performance through regular turning sessions.<\/jats:p>","DOI":"10.1177\/17479541251396336","type":"journal-article","created":{"date-parts":[[2025,11,24]],"date-time":"2025-11-24T22:41:22Z","timestamp":1764024082000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Biomechanical analysis of the backstroke to breaststroke turns in age-group swimmers"],"prefix":"10.1177","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2605-4181","authenticated-orcid":false,"given":"Phornpot","family":"Chainok","sequence":"first","affiliation":[{"name":"Burapha University"},{"name":"University of Porto"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7710-9843","authenticated-orcid":false,"given":"Karla","family":"de Jesus","sequence":"additional","affiliation":[{"name":"Human Performance Laboratory, Faculty of Physical Education and Physiotherapy, Federal University of Amazonas, Manaus, Brazil"}]},{"given":"Luis","family":"Mour\u00e3o","sequence":"additional","affiliation":[{"name":"University of Porto"},{"name":"Superior Institute of Engineering of Porto, Polytechnic Institute of Porto, Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0494-0000","authenticated-orcid":false,"given":"Rodrigo","family":"Zacca","sequence":"additional","affiliation":[{"name":"Research Center in Physical Activity, Health and Leisure (CIAFEL), Faculty of Sport, University of Porto (FADEUP), Porto, Portugal"},{"name":"Laboratory for Integrative and Translational Research in Population Health (ITR), Porto, Portugal"},{"name":"Laboratory of Sport Physiology, Faculty of Sport, University of Porto (FADEUP), Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4885-4924","authenticated-orcid":false,"given":"Pedro Filipe Pereira","family":"da Fonseca","sequence":"additional","affiliation":[{"name":"University of Porto"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5811-0443","authenticated-orcid":false,"given":"Ricardo J.","family":"Fernandes","sequence":"additional","affiliation":[{"name":"University of Porto"},{"name":"University of Porto"}]},{"given":"Jo\u00e3o Paulo","family":"Vilas-Boas","sequence":"additional","affiliation":[{"name":"University of Porto"},{"name":"University of Porto"}]}],"member":"179","published-online":{"date-parts":[[2025,11,24]]},"reference":[{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.1080\/02640414.2015.1085074"},{"key":"e_1_3_3_3_2","first-page":"129","article-title":"Tracking young talented swimmers: follow-up of performance and its biomechanical determinant factors","volume":"15","author":"Morais JE","year":"2013","unstructured":"Morais JE, Saavedra JM, Costa MJ, et al. 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