PMID- 29547490 OWN - NLM STAT- MEDLINE DCOM- 20181024 LR - 20190701 IS - 1533-4287 (Electronic) IS - 1064-8011 (Print) IS - 1064-8011 (Linking) VI - 32 IP - 7 DP - 2018 Jul TI - Within- and Between-Session Reliability of the Isometric Midthigh Pull in Young Female Athletes. PG - 1892-1901 LID - 10.1519/JSC.0000000000002566 [doi] AB - Moeskops, S, Oliver, JL, Read, PJ, Cronin, JB, Myer, GD, Haff, GG, and Lloyd, RS. Within- and between-session reliability of the isometric midthigh pull in young female athletes. J Strength Cond Res 32(7): 1892-1901, 2018-To investigate the within- and between-session reliability of the isometric midthigh pull (IMTP) in pre- and post-peak height velocity (PHV) female athletes. Nineteen pre- and 19 post-PHV athletes performed bilateral IMTPs using a custom-designed isometric testing system. Participants attended 3 separate testing sessions and performed 3 trials within each session. Peak force, relative peak force, force at 30, 50, 90, 100, 150, 200, and 250 ms, rate of force development (RFD) within time-specific bands, time to peak force (TPF), and time to peak RFD were obtained for analysis. Within- and between-session reliability for each variable was calculated from repeated-measures analysis of variance, intraclass correlation coefficients (ICCs), and coefficients of variation (CV) with 95% confidence intervals. Within- and between-session measures of absolute and relative peak force were found to be reliable for both pre-PHV (CV /= 0.87) and post-PHV (CV /= 0.92), but systematic bias was evident between sessions in the pre-PHV group, from session 1 to 2. Analyses of force at the specific time points revealed CVs between 19-37% and 5-24% for pre-PHV and post-PHV athletes, respectively. Greater variability was evident in TPF, and all RFD-related variables for pre-PHV (CV >/= 38%) and post-PHV (CV >/= 27%) athletes, respectively. The IMTP appears a reliable and safe method for evaluating peak force in young female athletes. Overall, post-PHV athletes were more reliable than pre-PHV athletes, with pre-PHV athletes needing additional familiarization to minimize the influence of systematic bias. FAU - Moeskops, Sylvia AU - Moeskops S AD - Youth Physical Development Unit, Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom. FAU - Oliver, Jon L AU - Oliver JL AD - Youth Physical Development Unit, Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom. AD - Sport 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. FAU - Cronin, John B AU - Cronin JB AD - Sport 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. AD - Department of Orthopaedics, University of Pennsylvania, Philadelphia, Pennsylvania. FAU - Haff, G Gregory AU - Haff GG AD - Center for Exercise and Sports Science, Edith Cowan University, Joondalup, Western Australia. FAU - Lloyd, Rhodri S AU - Lloyd RS AD - Youth Physical Development Unit, Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom. AD - Sport Performance Research Institute, New Zealand (SPRINZ), AUT University, Auckland, New Zealand. AD - Center for Sport Science and Human Performance, Waikato Institute of Technology, Hamilton, New Zealand. 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 - Athletes MH - Child MH - Exercise Test/*methods MH - Female MH - Humans MH - Isometric Contraction/*physiology MH - Kinetics MH - Muscle Strength/*physiology MH - Muscle, Skeletal/physiology MH - Reproducibility of Results PMC - PMC6014879 MID - NIHMS947841 EDAT- 2018/03/17 06:00 MHDA- 2018/10/26 06:00 PMCR- 2019/07/01 CRDT- 2018/03/17 06:00 PHST- 2018/03/17 06:00 [pubmed] PHST- 2018/10/26 06:00 [medline] PHST- 2018/03/17 06:00 [entrez] PHST- 2019/07/01 00:00 [pmc-release] AID - 10.1519/JSC.0000000000002566 [doi] PST - ppublish SO - J Strength Cond Res. 2018 Jul;32(7):1892-1901. doi: 10.1519/JSC.0000000000002566.