Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
from September 2014
©Journal of Sports Science and Medicine (2014) 13, 287 - 296

Research article
The Effects of Interset Rest on Adaptation to 7 Weeks of Explosive Training in Young Soccer Players
Rodrigo Ramirez-Campillo1, David C. Andrade2,4, Cristian Álvarez3, Carlos Henríquez-Olguín4, Cristian Martínez5, Eduardo Báez-SanMartín6, Juan Silva-Urra7, Carlos Burgos4, Mikel Izquierdo8, 
Author Information
1 Universidad de Los Lagos, Osorno, Chile
2 Universidad de Antofagasta, Antofagasta, Chile
3 Health Promotion Program, Los Lagos, Chile
4 Clinica MEDS, Las Condes, Chile
5 University of La Frontera, Temuco, Chile
6 University of Playa Ancha, Valparaíso, Chile
7 Universidad de Antofagasta, Chile
8 Public University of Navarre, Department of Health Sciences, Spain

Mikel Izquierdo
✉ Department of Health Sciences, Public University of Navarra, Campus of Tudela, Av. de Tarazona s/n. 31500 Tudela Navarra, Spain
Publish Date
Received: 16-09-2013
Accepted: 11-12-2013
Published (online): 01-05-2014
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The aim of the study was to compare the effects of plyometric training using 30, 60, or 120 s of rest between sets on explosive adaptations in young soccer players. Four groups of athletes (age 10.4 ± 2.3 y; soccer experience 3.3 ± 1.5 y) were randomly formed: control (CG; n = 15), plyometric training with 30 s (G30; n = 13), 60 s (G60; n = 14), and 120 s (G120; n = 12) of rest between training sets. Before and after intervention players were measured in jump ability, 20-m sprint time, change of direction speed (CODS), and kicking performance. The training program was applied during 7 weeks, 2 sessions per week, for a total of 840 jumps. After intervention the G30, G60 and G120 groups showed a significant (p = 0.0001 – 0.04) and small to moderate effect size (ES) improvement in the countermovement jump (ES = 0.49; 0.58; 0.55), 20 cm drop jump reactive strength index (ES = 0.81; 0.89; 0.86), CODS (ES = -1.03; -0.87; -1.04), and kicking performance (ES = 0.39; 0.49; 0.43), with no differences between treatments. The study shows that 30, 60, and 120 s of rest between sets ensure similar significant and small to moderate ES improvement in jump, CODS, and kicking performance during high-intensity short-term explosive training in young male soccer players.

Key words: Biological age, explosive strength, team sports, childhood, strength training

           Key Points
  • Replacing some soccer drills by low volume high-intensity plyometric training would be beneficial in jumping, change of direction speed, and kicking ability in young soccer players.
  • A rest period of 30, 60 or 120 seconds between low-volume high-intensity plyometric sets would induce significant and similar explosive adaptations during a short-term training period in young soccer players.
  • Data from this research can be helpful for soccer trainers in choosing efficient drills and characteristics of between sets recovery programs to enhance performances in young male soccer players.
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