PMID- 32569118 OWN - NLM STAT- MEDLINE DCOM- 20201221 LR - 20220309 IS - 1533-4287 (Electronic) IS - 1064-8011 (Print) IS - 1064-8011 (Linking) VI - 34 IP - 8 DP - 2020 Aug TI - The Influence of Biological Maturity and Competitive Level on Isometric Force-Time Curve Variables and Vaulting Performance in Young Female Gymnasts. PG - 2136-2145 LID - 10.1519/JSC.0000000000003672 [doi] AB - Moeskops, S, Oliver, JL, Read, PJ, Cronin, JB, Myer, GD, Haff, GG, and Lloyd, RS. The influence of biological maturity and competitive level on isometric force-time curve variables and vaulting performance in young female gymnasts. J Strength Cond Res 34(8): 2136-2145, 2020-This cross-sectional study investigated isometric force-time curve variables and vaulting performance in young female gymnasts of varying maturity and competitive levels. One hundred twenty gymnasts aged 5-14 years were subdivided into maturity groupings and also according to their competitive level. Subjects performed isometric midthigh pulls (IMTP) before completing straight jump vaults that were recorded using two-dimensional video. All significance values were accepted at p < 0.05. Absolute peak force (PF abs) and force at various time epochs were significantly greater in more mature gymnasts, although no significant differences were observed in relative peak force (PF rel). When grouped by competitive level, elite gymnasts produced a significantly greater absolute rate of force development (RFD abs) at 0-150, 0-200, and 0-250 ms as well as relative RFD (RFD rel) at 0-200 and 0-250 ms than recreational gymnasts. Based upon regression analyses, force at 50 ms during the IMTP test explained 15% of vertical takeoff velocity during vaulting. Biological maturation seems to impact isometric force-time curve characteristics in young female gymnasts, and higher-level gymnasts produce greater RFD than those competing at a lower level. Vaulting vertical takeoff velocity seems to be largely independent of isometric force-time characteristics with only a small amount of variance explained by force at 50 ms. FAU - Moeskops, Sylvia AU - Moeskops S AD - Youth Physical Development Unit, Cardiff School of Sport, Cardiff Metropolitan University, Cardiff, United Kingdom. FAU - Oliver, Jon L AU - Oliver JL AD - Youth Physical Development Unit, Cardiff School of Sport, Cardiff Metropolitan University, Cardiff, United Kingdom. AD - Sports Performance Research Institute New Zealand (SPRINZ), AUT University, Auckland, New Zealand. FAU - Read, Paul J AU - Read PJ AD - Athlete Health and Performance Research Center, Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar. AD - School of Sport and Exercise, University of Gloucestershire, Gloucester, United Kingdom. FAU - Cronin, John B AU - Cronin JB AD - Sports Performance Research Institute New Zealand (SPRINZ), AUT University, Auckland, New Zealand. FAU - Myer, Gregory D AU - Myer GD AD - Division of Sports Medicine, Cincinnati Children's Hospital, Cincinnati, Ohio. AD - Department of Pediatrics and Orthopaedic Surgery, College of Medicine, University of Cincinnati, Cincinnati, Ohio. AD - The Micheli Center for Sports Injury Prevention, Boston, Massachusetts. FAU - Haff, G Gregory AU - Haff GG AD - Center for Exercise and Sports Science, Edith Cowan University, Joondalup, Western Australia. AD - Australian Center for Research Into Injury in Sport and Its Prevention (ACRISP), Edith Cowan University, Joondalup, Western Australia; and. FAU - Lloyd, Rhodri S AU - Lloyd RS AD - Youth Physical Development Unit, Cardiff School of Sport, Cardiff Metropolitan University, Cardiff, United Kingdom. AD - Sports Performance Research Institute New Zealand (SPRINZ), AUT University, Auckland, New Zealand. AD - School of Sport and Exercise, University of Gloucestershire, Gloucester, United Kingdom. LA - eng GR - U01 AR067997/AR/NIAMS NIH HHS/United States PT - Journal Article PL - United States TA - J Strength Cond Res JT - Journal of strength and conditioning research JID - 9415084 SB - IM MH - Adolescent MH - Adolescent Development/*physiology MH - Child MH - Child Development/*physiology MH - Child, Preschool MH - Cross-Sectional Studies MH - Exercise Test/methods MH - Female MH - Gymnastics/*physiology MH - Humans MH - Isometric Contraction/*physiology MH - Muscle Strength/physiology MH - Muscle, Skeletal/*physiology MH - Thigh PMC - PMC8902447 MID - NIHMS1585650 EDAT- 2020/06/23 06:00 MHDA- 2020/12/22 06:00 PMCR- 2022/03/08 CRDT- 2020/06/23 06:00 PHST- 2020/06/23 06:00 [pubmed] PHST- 2020/12/22 06:00 [medline] PHST- 2020/06/23 06:00 [entrez] PHST- 2022/03/08 00:00 [pmc-release] AID - 00124278-202008000-00005 [pii] AID - 10.1519/JSC.0000000000003672 [doi] PST - ppublish SO - J Strength Cond Res. 2020 Aug;34(8):2136-2145. doi: 10.1519/JSC.0000000000003672.