title: Effects of eccentric overload bout on change of direction and performance in soccer players.
abstract: The aims of this study were to analyse the effects of eccentric overload training (EOT) on kinetic parameters during change of direction (COD) and performance related to sprinting and jumping abilities. 20 male soccer players performed 2 different protocols: 1) 5-min cycling warm-up and 2) 5-min cycling warm-up+YoYo half-squat exercise. The outcome measured included vertical ground reaction force (vGRF) and propulsive force (PvGRF), time to vGRF (T_vGRF) and propulsive force (T_PvGRF), contact time (CT), eccentric (ECC_IMP), concentric (CONC_IMP) and total (TOT_IMP) impulses and moments (Mx, My and Mz) during 2 COD tasks. Additionally, subjects performed a counter-movement jump (CMJ) and 20 m sprint tests. Results showed a substantial better improvement (likely to almost certainly) in vGRF (ES: 0.84), vAGRF (ES: 0.72), CT (ES: 0.48), My (ES: 0.35), Mz (ES: 0.44) and ECC_IMP (ES: 0.45) during crossover cutting maneuver, whereas during side-step cutting maneuver Time_ECC (ES: 0.68), CT (ES: 0.64), vGRF (ES: 0.48) and My (ES: 0.47) were substantially enhanced (likely). Furthermore, substantial better performance was found in CMJ (ES: 0.47; very likely) and 20 m (ES: 0.20; possibly). In conclusion, EOT produced a better muscle activation during 2 different COD tasks and greater sprinting and jumping performance.
authors.affiliation: Physical Education and Sport, University of Seville, Seville, Spain.
authors.forename: M
authors.initials: M
authors.lastname: de Hoyo
authors.affiliation: Medical Services, Getafe Football Club, Madrid, Spain.
authors.forename: A
authors.initials: A
authors.lastname: de la Torre
authors.affiliation: Department of Sport Sciences, University of Zaragoza, Huesca, Spain.
authors.forename: F
authors.initials: F
authors.lastname: Pradas
authors.affiliation: Physical Education and Sport, University of Seville, Seville, Spain.
authors.forename: B
authors.initials: B
authors.lastname: Sañudo
authors.affiliation: Physical Education and Sport, University of Seville, Seville, Spain.
authors.forename: L
authors.initials: L
authors.lastname: Carrasco
authors.affiliation: Physical Education and Sport, University of Seville, Seville, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Mateo-Cortes
authors.affiliation: Fitness Section, Sevilla Football Club, Seville, Spain.
authors.forename: S
authors.initials: S
authors.lastname: Domínguez-Cobo
authors.affiliation: Sports and Health Department, University of Évora, Sports and Health Department, Évora, Portugal.
authors.forename: O
authors.initials: O
authors.lastname: Fernandes
authors.affiliation: Faculty of Health Sciences, University of San Jorge, Zaragoza, Spain.
authors.forename: O
authors.initials: O
authors.lastname: Gonzalo-Skok
mesh_terms: D000293:Adolescent; D054874:Athletic Performance / Q000502:physiology*; D018592:Cross-Over Studies; D005080:Exercise Test / Q000379:methods; D006801:Humans; D008297:Male; D053580:Muscle Strength; D018482:Muscle, Skeletal / Q000502:physiology; D010806:Physical Education and Training / Q000379:methods*; D059385:Plyometric Exercise; D055070:Resistance Training / Q000379:methods; D012420:Running / Q000502:physiology; D012916:Soccer / Q000502:physiology*; D055815:Young Adult