TY - JOUR

T1 - Effects of in-season low-volume high-intensity plyometric training on explosive actions and endurance of young soccer players

AU - Ramírez-Campillo, Rodrigo

AU - Meylan, César

AU - Álvarez, Cristian

AU - Henríquez-Olguín, Carlos

AU - Martínez, Cristian

AU - Cañas-Jamett, Rodrigo

AU - Andrade, David C

AU - Izquierdo, Mikel

N1 - (Ekstern)

PY - 2014

Y1 - 2014

N2 - Integrating specific training methods to improve explosive actions and endurance in youth soccer is an essential part of players' development. This study investigated the efficiency of shortterm vertical plyometric training program within soccer practice to improve both explosive actions and endurance in young soccer players. Seventy-six players were recruited and assigned either to a training group (TG; n = 38; 13.2 ± 1.8 years) or a control group (CG; n = 38; 13.2 ± 1.8 years) group. All players trained twice per week, but the TG followed a 7-week plyometric program implemented within soccer practice, whereas the CG followed regular practice. Twenty-meter sprint time (20-m), Illinois agility test time, countermovement jump (CMJ) height, 20- (RSI20) and 40- (RSI40) cm drop jump reactive strength index, multiple 5 bounds distance (MB5), maximal kicking test for distance (MKD), and 2.4-km time trial were measured before and after the 7-week period. Plyometric training induced significant (p ≤ 0.05) and small to moderate standardized effect (SE) improvement in the CMJ (4.3%; SE = 0.20), RSI20 (22%; SE = 0.57), RSI40 (16%; SE = 0.37), MB5 (4.1%; SE = 0.28), Illinois agility test time (23.5%, SE = 20.26), MKD (14%; SE = 0.53), 2.4-km time trial (21.9%; SE = 20.27) performances but had a trivial and nonsignificant effect on 20-m sprint time (20.4%; SE = 20.03). No significant improvements were found in the CG. An integrated vertical plyometric program within the regular soccer practice can substitute soccer drills to improve most explosive actions and endurance, but horizontal exercises should also be included to enhance sprinting performance.

AB - Integrating specific training methods to improve explosive actions and endurance in youth soccer is an essential part of players' development. This study investigated the efficiency of shortterm vertical plyometric training program within soccer practice to improve both explosive actions and endurance in young soccer players. Seventy-six players were recruited and assigned either to a training group (TG; n = 38; 13.2 ± 1.8 years) or a control group (CG; n = 38; 13.2 ± 1.8 years) group. All players trained twice per week, but the TG followed a 7-week plyometric program implemented within soccer practice, whereas the CG followed regular practice. Twenty-meter sprint time (20-m), Illinois agility test time, countermovement jump (CMJ) height, 20- (RSI20) and 40- (RSI40) cm drop jump reactive strength index, multiple 5 bounds distance (MB5), maximal kicking test for distance (MKD), and 2.4-km time trial were measured before and after the 7-week period. Plyometric training induced significant (p ≤ 0.05) and small to moderate standardized effect (SE) improvement in the CMJ (4.3%; SE = 0.20), RSI20 (22%; SE = 0.57), RSI40 (16%; SE = 0.37), MB5 (4.1%; SE = 0.28), Illinois agility test time (23.5%, SE = 20.26), MKD (14%; SE = 0.53), 2.4-km time trial (21.9%; SE = 20.27) performances but had a trivial and nonsignificant effect on 20-m sprint time (20.4%; SE = 20.03). No significant improvements were found in the CG. An integrated vertical plyometric program within the regular soccer practice can substitute soccer drills to improve most explosive actions and endurance, but horizontal exercises should also be included to enhance sprinting performance.

KW - Agility

KW - Explosive strength

KW - Stretch-shortening cycle

KW - Vertical jump

U2 - 10.1519/JSC.0000000000000284

DO - 10.1519/JSC.0000000000000284

M3 - Journal article

C2 - 24751658

AN - SCOPUS:84902085652

VL - 28

SP - 1335

EP - 1342

JO - Journal of Strength and Conditioning Research

JF - Journal of Strength and Conditioning Research

SN - 1064-8011

IS - 5

ER -