{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,24]],"date-time":"2026-02-24T16:45:54Z","timestamp":1771951554685,"version":"3.50.1"},"reference-count":56,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2021,9,9]],"date-time":"2021-09-09T00:00:00Z","timestamp":1631145600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Taiwan University of Sport","award":["110DG00112"],"award-info":[{"award-number":["110DG00112"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>The effect of asymmetry on flexibility and jump in taekwondo athletes and the influence of vibration foam rolling on asymmetry and frequency speed of kick test has not been examined. This study examined the effects of three warm-up protocols on subsequent sports performance in elite male taekwondo athletes. Fifteen elite male taekwondo athletes (20.63 \u00b1 1.18 years) completed three warm-up protocols in a randomized order: general warm-up [GW], GW with vibration foam rolling [GW + VR], and GW with double VR for the weaker leg [GW + double VR]), was delivered before the subsequent tests: flexibility, single-leg countermovement jump (CMJ), 505 agility, hexagon test, and multiple frequency speed of kick tests (FSKTs). Relative to GW, the GW + VR significantly improved the hexagon test (GW + VR = 11.60 \u00b1 1.01 s; GW = 12.80 \u00b1 1.58 s). In addition, the GW + VR and GW + double VR yielded greater kick numbers in FSKT 5 (GW + VR = 21.13 \u00b1 1.96 reps; GW + double VR = 20.93 \u00b1 1.67 reps; GW = 19.27 \u00b1 1.62 reps) and a higher kick decrement index (GW + VR = 5.45 \u00b1 2.57%; GW + double VR = 5.88 \u00b1 3.22%; GW = 9.54 \u00b1 5.00%). However, the GW + VR and GW + double VR did not significantly improve the flexibility and CMJ asymmetry performance. The GW + VR is more beneficial for warming up than the GW is among male collegiate taekwondo athletes.<\/jats:p>","DOI":"10.3390\/sym13091664","type":"journal-article","created":{"date-parts":[[2021,9,9]],"date-time":"2021-09-09T21:36:58Z","timestamp":1631223418000},"page":"1664","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Acute Effects of Vibration Foam Rolling Warm-Up on Jump and Flexibility Asymmetry, Agility and Frequency Speed of Kick Test Performance in Taekwondo Athletes"],"prefix":"10.3390","volume":"13","author":[{"given":"An-Hsu","family":"Chen","sequence":"first","affiliation":[{"name":"Graduate Institute of Sports Training; Department of Martial Arts, University of Taipei, Taipei 111036, Taiwan"}]},{"given":"Chih-Hui","family":"Chiu","sequence":"additional","affiliation":[{"name":"Department of Exercise Health Science, National Taiwan University of Sport, Taichung 404401, Taiwan"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6652-0795","authenticated-orcid":false,"given":"Chin-Hsien","family":"Hsu","sequence":"additional","affiliation":[{"name":"Department of Leisure Industry Management, National Chin-Yi University of Technology, Taichung 411030, Taiwan"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6234-3768","authenticated-orcid":false,"given":"I-Lin","family":"Wang","sequence":"additional","affiliation":[{"name":"College of Physical Education, Hubei Normal University, Huangshi 435002, China"}]},{"given":"Kuei-Ming","family":"Chou","sequence":"additional","affiliation":[{"name":"Department of Combat Sport, National Taiwan University of Sport, Taichung 404401, Taiwan"}]},{"given":"Yung-Shen","family":"Tsai","sequence":"additional","affiliation":[{"name":"Graduate Institute of Sports Equipment Technology, University of Taipei, Taipei 111036, Taiwan"}]},{"given":"Yu-Fang","family":"Lin","sequence":"additional","affiliation":[{"name":"Department of Sport Performance, National Taiwan University of Sport, Taichung 404401, Taiwan"}]},{"given":"Che-Hsiu","family":"Chen","sequence":"additional","affiliation":[{"name":"Department of Sport Performance, National Taiwan University of Sport, Taichung 404401, Taiwan"}]}],"member":"1968","published-online":{"date-parts":[[2021,9,9]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"243","DOI":"10.1080\/026404198366768","article-title":"Physiological profiles of male and female taekwon-do (ITF) black belts","volume":"16","author":"Heller","year":"1998","journal-title":"J. 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