32 Journal of Exercise Physiologyonline August 2016 Volume 19 Number 4 Editor-in-Chief Tommy Boone, PhD, MBA Review Board Todd Astorino, PhD Julien Baker, PhD Steve Brock, PhD Lance Dalleck, PhD Eric Goulet, PhD Robert Gotshall, PhD Alexander Hutchison, PhD M. Knight-Maloney, PhD Len Kravitz, PhD James Laskin, PhD Yit Aun Lim, PhD Lonnie Lowery, PhD Derek Marks, PhD Cristine Mermier, PhD Robert Robergs, PhD Chantal Vella, PhD Dale Wagner, PhD Frank Wyatt, PhD Ben Zhou, PhD Official Research Journal of the American Society of Exercise Physiologists ISSN 1097-9751 Official Research Journal of the American Society of Exercise Physiologists ISSN 1097-9751 JEPonline Effect of 29 Weeks of Periodized Soccer Training on the Neuromuscular Performance of Soccer Players Under 20 Years of Age Daniel Alves Corrêa 1 , Danilo Saad Soares 1 , Pamela R. G. Gonelli 1 , Marcelo de C. Cesar 1 , Moisés D. Germano 1 , Marcio A. G. Sindorf 1 , Alex Harley Crisp 1,3 , Rozangela Verlengia 1 , Hermes Ferreira Balbino 1 , Charles R. Lopes 1,2 1 Department of Science of Human Movement, Methodist University of Piracicaba, Piracicaba, São Paulo, Brazil, 2 Faculty Adventist of Hortolândia (UNASP), Hortolândia. São Paulo, 3 Post-graduate program in Food and Nutrition, Nutritional Sciences, São Paulo State University (UNESP), Araraquara, SP, Brazil ABSTRACT Corrêa DA, Soares DS, Gonelli PRG, Cesar MC, Sindorf MAG, Crisp AH, Verlengia R, Balbino HF, Lopes CR. Effect of 29 Weeks of Periodized Soccer Training on the Neuromuscular Performance of Soccer Players Under 20 Years of Age. JEPonline 2016;19(4):32- 41. The purpose of this study was to investigate the effects of 29 weeks of periodized soccer training (linear during pre-season and ondulatory during the competitive period) on the neuromuscular performance of soccer players under 20 yrs of age. Ten regionally ranked male athletes (19.2 ± 1.3 yrs, body mass 71.1 ± 6.8 kg, height 179.0 ± 0.2 cm) participated in this study. The pre-season physical training program lasted 9 wks. The competitive period lasted 19 wks. The assessments were conducted at specific times during training periodization: baseline, 4, 8, and 19 wks. The results showed improvements in squat jump performance and maximal strength during the pre-season and the competitive period, respectively. On the other hand, repeated sprint ability and the 15-m sprint performance were reduced at the end of competitive period. Thus, the findings indicate that 29 wks of periodized soccer training increased the soccer players’ maximum strength and maintained their vertical jump performance. However, the models adopted did not improve repeated sprint ability and the 15-m sprint time. Key Words: Periodization, Soccer, Sports Training, Sprint