ABSTRACT
Successful soccer performance in each player is not only dependent upon technical, tactical and mental insight, but also upon the capablity to release the energy required during play. The type of physical activity demanded in soccer is classified as high intensity, intermittent exercise. Thus, both anaerobic and aerobic processes are required for energy liberation in individual players. Determinations of blood lactate concentrations during a match indicate that anaerobic energy yield plays an important role (Ekblom, 1986). Maximal aerobic work capacity expressed as maximal oxygen uptake ( https://www.w3.org/1998/Math/MathML"> V . 0 2 https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780203720035/4f171d74-2867-42d1-88ad-137858f57c23/content/inline-math_110_B.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> max), is fairly high in elite soccer players (Ekblom, 1986) and during a game the relative contribution of aerobic process has been reported to account for 70 – 80% of maximal capacity (Reilly, 1979; Ekblom, 1986).
