{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,13]],"date-time":"2026-08-13T04:30:46Z","timestamp":1786595446933,"version":"build-2736575974"},"reference-count":29,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,8,13]],"date-time":"2026-08-13T00:00:00Z","timestamp":1786579200000},"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. Psychol."],"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Tennis racket string tension may influence ball speed, directional control, and perceived comfort, yet evidence from real hitting tasks remains limited.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>This study examined the effects of five string tensions on forehand and backhand performance and tested whether subjective comfort aligns with objectively optimal tension.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Twenty-seven trained tennis players completed a repeated-measures experiment using five identical rackets strung at 40, 45, 50, 55, and 60\u202flb. Ball speed was derived from high-speed video, accuracy was scored using a concentric target, and perceived comfort was assessed using a 5-point Likert scale and final preferred-racket selection. Ball speed and accuracy were analyzed using 2 hitting sides \u00d7 5 string tensions \u00d7 2 sex groups mixed-design ANOVAs. Correlations examined associations among fastest racket swing speed, subjectively preferred tension, and individualized optimal-tension outcomes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Forehand ball speed was significantly higher than backhand ball speed,\n                      <jats:italic>F<\/jats:italic>\n                      (1,25)\u202f=\u202f41.51,\n                      <jats:italic>p<\/jats:italic>\n                      \u202f&amp;lt;\u202f0.001, \u03b7p\n                      <jats:sup>2<\/jats:sup>\n                      \u202f=\u202f0.624. String tension did not significantly affect ball speed, whereas accuracy differed significantly across tensions,\n                      <jats:italic>F<\/jats:italic>\n                      (4,100)\u202f=\u202f40.37,\n                      <jats:italic>p<\/jats:italic>\n                      \u202f&amp;lt;\u202f0.001, \u03b7p\n                      <jats:sup>2<\/jats:sup>\n                      \u202f=\u202f0.618, generally improving at higher tensions. A significant tension \u00d7 sex interaction was also observed for accuracy,\n                      <jats:italic>F<\/jats:italic>\n                      (4,100)\u202f=\u202f4.22,\n                      <jats:italic>p<\/jats:italic>\n                      \u202f=\u202f0.003, \u03b7p\n                      <jats:sup>2<\/jats:sup>\n                      \u202f=\u202f0.144. Fastest racket swing speed was positively associated with ball speed at the speed-optimal tension for both strokes, but not with optimal-tension values or best accuracy scores. Subjectively preferred tension showed limited agreement with objective speed- or accuracy-optimal tension, and no correlations remained significant after FDR correction.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Within 40\u201360\u202flb, string tension influenced accuracy more consistently than ball speed. Perceived comfort provides complementary information but should not replace objective performance testing in individualized racket configuration.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3389\/fpsyg.2026.1889737","type":"journal-article","created":{"date-parts":[[2026,8,13]],"date-time":"2026-08-13T04:24:00Z","timestamp":1786595040000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Subjective\u2013objective fit in tennis racket string-tension selection: perceived comfort, hitting performance, and fastest swing-speed associations"],"prefix":"10.3389","volume":"17","author":[{"given":"Jun-jie","family":"Yang","sequence":"first","affiliation":[{"name":"Shanghai University of Sport","place":["Shanghai, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bo","family":"Sun","sequence":"additional","affiliation":[{"name":"Shanghai University of Sport","place":["Shanghai, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jie","family":"Ren","sequence":"additional","affiliation":[{"name":"Shanghai University of Sport","place":["Shanghai, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2026,8,13]]},"reference":[{"key":"ref1","doi-asserted-by":"publisher","first-page":"91","DOI":"10.1016\/j.tjem.2018.08.001","article-title":"User\u2019s guide to correlation coefficients","volume":"18","author":"Akoglu","year":"2018","journal-title":"Turk. 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