Periodization training focused on technical-tactical ability in young soccer players positively affects biochemical markers and game performance - Aquino, Rodrigo L. Q. T.; Gonçalves, Luiz G. Cruz; Vieira, Luiz H. Palucci; Oliveira, Lucas P.; Alves, Guilherme F.; Santiago, Paulo Roberto Pereira; Puggina, Enrico Fuini (Journal of Strength and Conditioning Research, 2016)