{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,19]],"date-time":"2025-11-19T14:59:38Z","timestamp":1763564378255,"version":"3.32.0"},"reference-count":37,"publisher":"Termedia Sp. z.o.o.","license":[{"start":{"date-parts":[[2024,12,6]],"date-time":"2024-12-06T00:00:00Z","timestamp":1733443200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2024,12,6]],"date-time":"2024-12-06T00:00:00Z","timestamp":1733443200000},"content-version":"am","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2024,12,6]],"date-time":"2024-12-06T00:00:00Z","timestamp":1733443200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Human Kinetics"],"abstract":"<jats:p>The purpose of this study was to compare the effects of on-court tennis training (OTT) combined with high-intensity interval training (HIIT) or repeated sprint training (RST) on the physiological, kinematic, kinetic, and perceptual responses of young tennis players. Twenty-four male tennis players (age 13.6 \u00b1 0.3 years) were randomly assigned to either the OTT + HIIT group (n = 12) or the OTT + RST group (n = 12) three times per week for six weeks. Both groups trained for the same total training time with passive rest in each session. A number of physiological, performance and perceptual responses were measured before and after the 6-week training intervention. All variables showed a significant improvement over time, with maximal oxygen uptake showing the greatest improvement (p &lt; 0.001, \u03b72 = 0.97). The 5-m sprint (p = 0.044, \u03b72 = 0.17), repeated sprint ability (p = 0.021, \u03b72 = 0.22), and T-drill agility (p = 0.048, \u03b72 = 0.17) showed a significant group effect. The OTT + RST group had a lower internal training load (better scores), a lower rate of perceived exertion (better scores), and higher scores in the Physical Activity Enjoyment Scale (PACES) at both times compared to the OTT + HITT group. These results demonstrate that OTT + RST appears to be a more effective training approach to improve speed and agility-based performance responses with more enjoyment in young tennis players.<\/jats:p>","DOI":"10.5114\/jhk\/189691","type":"journal-article","created":{"date-parts":[[2024,12,12]],"date-time":"2024-12-12T10:34:31Z","timestamp":1733999671000},"source":"Crossref","is-referenced-by-count":5,"title":["Effects of On-Court Tennis Training Combined with HIIT versus RST on Aerobic Capacity, Speed, Agility, Jumping Ability, and Internal Loads in Young Tennis Players"],"prefix":"10.5114","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6885-0648","authenticated-orcid":false,"given":"Jorge","family":"Morais","sequence":"first","affiliation":[]},{"given":"Bulent","family":"Kilit","sequence":"additional","affiliation":[]},{"given":"Ersan","family":"Arslan","sequence":"additional","affiliation":[]},{"given":"Jos\u00e9","family":"Bragada","sequence":"additional","affiliation":[]},{"given":"Yusuf","family":"Soylu","sequence":"additional","affiliation":[]},{"given":"Daniel","family":"Marinho","sequence":"additional","affiliation":[]}],"member":"3061","published-online":{"date-parts":[[2024,12,6]]},"reference":[{"key":"ref-1297273","doi-asserted-by":"crossref","unstructured":"Bishop, D., Girard, O., & Mendez-Villanueva, A. 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