{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,11]],"date-time":"2026-05-11T17:10:22Z","timestamp":1778519422614,"version":"3.51.4"},"reference-count":28,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,5,11]],"date-time":"2026-05-11T00:00:00Z","timestamp":1778457600000},"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:p>\n                    This study examined the effects of different plyometric training configurations on mental well-being in post-pubertal highly trained male soccer players. Participants were assigned to bilateral (4 \u00d7 8;\n                    <jats:italic>n<\/jats:italic>\n                    = 10), high-volume unilateral (4 \u00d7 8;\n                    <jats:italic>n<\/jats:italic>\n                    = 10), or low-volume unilateral (4 \u00d7 4;\n                    <jats:italic>n<\/jats:italic>\n                    = 11) training groups. Pre-post assessments included cognitive anxiety, somatic anxiety, self-confidence, attention, and emotional competence. Baseline scores were similar across groups for most variables (\n                    <jats:italic>p<\/jats:italic>\n                    &amp;gt; 0.05), except total emotional competence, which was higher in the unilateral 4 \u00d7 4 group (\n                    <jats:italic>F<\/jats:italic>\n                    = 13.4,\n                    <jats:italic>p<\/jats:italic>\n                    &amp;lt; 0.001, \u03b7\n                    <jats:sup>2<\/jats:sup>\n                    = 0.48). Significant main effects of time were observed for all variables (\n                    <jats:italic>F<\/jats:italic>\n                    \u2265 18.7,\n                    <jats:italic>p<\/jats:italic>\n                    \u2264 0.001, \u03b7\n                    <jats:sup>2<\/jats:sup>\n                    \u2265 0.37). Cognitive anxiety decreased significantly in all groups (\n                    <jats:italic>p<\/jats:italic>\n                    &amp;lt; 0.05), while somatic anxiety decreased significantly only in the bilateral group (\n                    <jats:italic>p<\/jats:italic>\n                    &amp;lt; 0.05). Self-confidence increased significantly in the bilateral and unilateral 4 \u00d7 4 groups (\n                    <jats:italic>p<\/jats:italic>\n                    &amp;lt; 0.05). Attention showed a significant time \u00d7 group interaction (\n                    <jats:italic>F<\/jats:italic>\n                    = 3.54,\n                    <jats:italic>p<\/jats:italic>\n                    = 0.042, \u03b7\n                    <jats:sup>2<\/jats:sup>\n                    = 0.20), with the unilateral 4 \u00d7 4 group improving more than the unilateral 4 \u00d7 8 group. Emotional competence increased in all groups; however, the unilateral 4 \u00d7 4 group remained higher at both pre- and post-test, resulting in a significant group effect (\n                    <jats:italic>F<\/jats:italic>\n                    = 16.4,\n                    <jats:italic>p<\/jats:italic>\n                    &amp;lt; 0.001, \u03b7\n                    <jats:sup>2<\/jats:sup>\n                    = 0.53). No significant differences were found between high- and low-volume unilateral training for the other outcomes. These results indicate that plyometric training enhances mental well-being in youth highly trained male soccer players, but neither increased volume nor unilateral specificity provides additional benefits. Bilateral training may be most effective for reducing cognitive anxiety, while low-volume unilateral training offers a time-efficient alternative.\n                  <\/jats:p>","DOI":"10.3389\/fpsyg.2026.1844921","type":"journal-article","created":{"date-parts":[[2026,5,11]],"date-time":"2026-05-11T16:31:01Z","timestamp":1778517061000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Psychological benefits of bilateral and unilateral plyometric training configurations in post-pubertal highly trained male soccer players"],"prefix":"10.3389","volume":"17","author":[{"given":"Achraf","family":"Hammami","sequence":"first","affiliation":[{"name":"Higher Institute of Sport and Physical Education of Ksar-Said, University of Manouba, University Campus","place":["Manouba, Tunisia"]},{"name":"Tunisian Research Laboratory \u2018Sports Performance Optimization', National Center of Medicine and Science in Sports (CNMSS)","place":["Tunis, Tunisia"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Raouf","family":"Hammami","sequence":"additional","affiliation":[{"name":"Higher Institute of Sport and Physical Education of Ksar-Said, University of Manouba, University Campus","place":["Manouba, Tunisia"]},{"name":"Tunisian Research Laboratory \u2018Sports Performance Optimization', National Center of Medicine and Science in Sports (CNMSS)","place":["Tunis, Tunisia"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Abdelkader","family":"Mahmoudi","sequence":"additional","affiliation":[{"name":"Tunisian Research Laboratory \u2018Sports Performance Optimization', National Center of Medicine and Science in Sports (CNMSS)","place":["Tunis, Tunisia"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Haithem","family":"Rebai","sequence":"additional","affiliation":[{"name":"Tunisian Research Laboratory \u2018Sports Performance Optimization', National Center of Medicine and Science in Sports (CNMSS)","place":["Tunis, Tunisia"]},{"name":"Higher Institute of Sport and Physical Education of Sfax, University of Sfax, University Campus","place":["Sfax, Tunisia"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Roland van den","family":"Tillaar","sequence":"additional","affiliation":[{"name":"Department of Sport Sciences and Physical Education, Nord University","place":["Levanger, Norway"]}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1965","published-online":{"date-parts":[[2026,5,11]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"155","DOI":"10.2147\/PRBM.S188481","article-title":"A preliminary validation of the Arabic version of the \u201cProfile of Emotional Competence\u201d questionnaire among Tunisian adolescent athletes and nonathletes: insights and implications for sports psychology","volume":"12","author":"Aouani","year":"2019","journal-title":"Psychol. 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