title: Effects of fast-velocity eccentric resistance training on early and late rate of force development.
abstract: This study examined whether short-term maximal resistance training employing fast-velocity eccentric knee extensor actions would induce improvements in maximal isometric torque and rate of force development (RFD) at early (<100 ms) and late phases (>100 ms) of rising torque. Twenty healthy men were assigned to two experimental groups: eccentric resistance training (TG) or control (CG). Participants on the TG trained three days a week for a total of eight weeks. Training consisted of maximal unilateral eccentric knee extensors actions performed at 180 °s-1. Maximal isometric knee extensor torque (MVC) and incremental RFD in successive 50 ms time-windows from the onset contraction were analysed in absolute terms (RFDINC) or when normalised relative to MVC (RFDREL). After eight weeks, TG demonstrated increases in MVC (28%), RFDINC (0-50 ms: 30%; 50-100 ms: 31%) and RFDREL (0-50 ms: 29%; 50-100 ms: 32%). Moreover, no changes in the late phase of incremental RFD were observed in TG. No changes were found in the CG. In summary, we have demonstrated, in active individuals, that a short period of resistance training performed with eccentric fast-velocity isokinetic muscle contractions is able to enhance RFDINC and RFDREL obtained at the early phase of rising joint torque.
authors.affiliation: a Human Performance Laboratory , São Paulo State University , Rio Claro , Brazil.|b Department of Health Science and Technology , Aalborg University , Aalborg , Denmark.
authors.forename: Anderson Souza
authors.initials: AS
authors.lastname: Oliveira
authors.affiliation: a Human Performance Laboratory , São Paulo State University , Rio Claro , Brazil.|c Center for Health and Sport Science , Santa Catarina State University , Florianópolis , Brazil.
authors.forename: Rogério Bulhões
authors.initials: RB
authors.lastname: Corvino
authors.affiliation: a Human Performance Laboratory , São Paulo State University , Rio Claro , Brazil.|c Center for Health and Sport Science , Santa Catarina State University , Florianópolis , Brazil.
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Caputo
authors.affiliation: d SDU Muscle Research Cluster (SMRC) , Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark , Odense , Denmark.
authors.forename: Per
authors.initials: P
authors.lastname: Aagaard
authors.affiliation: a Human Performance Laboratory , São Paulo State University , Rio Claro , Brazil.
authors.forename: Benedito Sérgio
authors.initials: BS
authors.lastname: Denadai
mesh_terms: D000328:Adult; D006801:Humans; D007537:Isometric Contraction / Q000502:physiology*; D007717:Knee / Q000502:physiology; D008297:Male; D053580:Muscle Strength / Q000502:physiology*; D055070:Resistance Training / Q000379:methods*; D019415:Torque; D055815:Young Adult
keywords: Isometric; eccentric training; explosive strength; maximal torque; rate of force development