Abstract
Harden, M, Wolf, A, Haff, GG, Hicks, KM, and Howatson, G. Repeatability and specificity of eccentric force output and the implications for eccentric training load prescription. J Strength Cond Res 33(3): 676-683, 2019-Prescribing supramaximal eccentric (ECC) loads based on repetition maximum, isometric (ISO), or concentric-only (CON) strength overlooks the possibility that individuals have a different tolerance for ECC exercise. To inform the prescription of ECC training regimes, this study implemented a test battery that included maximal accentuated-eccentric (ECC+), traditional coupled eccentric-concentric (TRAD), and 2 ISO conditions (90 and 120° knee-joint angle [ISO90 and ISO120, respectively]). The study aimed to determine the repeatability and specificity of ECC+ force output and assess the methodological accuracy when using nonspecific measures of strength to prescribe ECC+ training loads. Results show that the test battery was repeatable (p > 0.05, intraclass correlation coefficient >0.95, coefficient of variation: <5.8%) and force output was specific to each task; ECC+ (4,034 ± 592 N) was higher (p < 0.001) than ISO90 (3,122 ± 579 N) and TRAD (3,574 ± 581 N), but less (p < 0.001) than ISO120 (6,285 ± 1,546 N). Althoug...Continue Reading
References
Feb 1, 1989·The Journal of Physiology·A NardoneM Schieppati
Jan 1, 1973·Journal of Biomechanics·G L Smidt
Oct 1, 1996·Journal of Applied Physiology·T HortobágyiJ Lambert
Dec 1, 1996·Journal of Applied Physiology·R M Enoka
Jun 16, 2000·Journal of Sports Sciences·S Marcora, M K Miller
Jul 25, 2000·Sports Medicine·W G Hopkins
Jul 11, 2001·Medicine and Science in Sports and Exercise·T HortobágyiJ Barrier
Feb 9, 2002·Journal of Strength and Conditioning Research·Brandon K DoanWilliam J Kraemer
Feb 9, 2002·Journal of Strength and Conditioning Research·Jason P Brandenburg, David Docherty
Nov 30, 2002·European Journal of Applied Physiology·P ZamparoP E di Prampero
May 13, 2003·Journal of Applied Physiology·Neil D Reeves, Marco V Narici
May 21, 2003·European Journal of Applied Physiology·Jonathan P Farthing, Philip D Chilibeck
Oct 5, 2006·Medicine and Science in Sports and Exercise·Russell S RichardsonD Walter Wray
Aug 25, 2007·Journal of Applied Physiology·Anthony J BlazevichSara Horne
Nov 5, 2008·British Journal of Sports Medicine·M RoigW D Reid
Apr 28, 2009·Experimental Physiology·Neil D ReevesMarco V Narici
Nov 26, 2009·European Journal of Applied Physiology·Birgit Friedmann-BetteRudolf Billeter
Jul 15, 2011·European Journal of Applied Physiology·Daniel R MooreStuart M Phillips
Feb 23, 2013·Journal of Applied Physiology·Walter Herzog
Nov 16, 2013·Journal of Human Kinetics·Gavin L MoirChad A Witmer
Jul 23, 2014·European Journal of Applied Physiology·Kirk L EnglishScott M Smith
Jun 8, 2015·Journal of Strength and Conditioning Research·Nikolaos D ZarasGerasimos D Terzis
May 21, 2016·Frontiers in Physiology·Simon WalkerKeijo Häkkinen
Feb 6, 2017·European Journal of Sport Science·Rafael SabidoJulio Tous-Fajardo
Jul 7, 2017·Sports Medicine·John P WagleMichael H Stone
Jul 21, 2017·Frontiers in Physiology·Martino V FranchiMarco V Narici
Dec 6, 2017·Medicine and Science in Sports and Exercise·Gregory C BogdanisGerasimos Terzis
Jan 13, 2018·Frontiers in Physiology·Craig Pickering, John Kiely
Feb 23, 2018·Journal of Strength and Conditioning Research·Mellissa HardenGlyn Howatson
Jun 2, 2018·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Jakob ŠkarabotRade Durbaba