“…Therefore, they are used extensively to improve physical fitness levels and also technical and tactical performance in a wide variety of soccer codes (Balsom, 1999; Drust et al, 2000; Gabbett, 2002; Nurmekivi et al, 2002; Bangsbo, 2003; Reilly and Gilbourne, 2003; Gamble, 2004; Eniseler, 2005; Gabbett, 2005; Reilly and White, 2005; Sainz and Cabello, 2005; Sassi et al, 2005; Rampinini et al, 2007; Aguiar et al, 2008; Duarte et al, 2009, Hill-Haas et al, 2008, 2009a,b,c, 2010). …”