links with the capability to perceive and process external information (Korobeynikov, et al.,fi tness requirement for male soccer players to play at elite level. While the average maximal oxygen intake for elite adult players are reported to be in the range of 55 to 69 ml/kg/min. Although to predict the eff ective endurance training to improve maximal oxygen uptake, recent research confi rmed obesity in terms of Fat percentage is a better parameter than BMI for the prediction of low VO2max. On its scientifi c basis, our aims are to test BMI VS BFP as a relation to estimate players’ physiological soccer adaptation profi le. Methods: to archive this objective, 148 well-trained fi rst division soccer players under 18 years, at the end of the preparatory phase before the start of the Algerian championship 2016-2017, took part in the study. Split into two groups based on their V02max under or superior to 56 ml/kg/min. As a protocol, based on the validity of Test Cooper to predict VO2max in the fi eld. Acceptable by cooper institute as an index of physiological training response or as indicators of current training status. Results: our results show in general that VO2max is acceptable indicators of current training status. In the benefi ts of up to ≥ 56 ml/kg/min then it’s less. Claim in the present through physiological soccer adaptation profi le more related to obesity in terms of Fat percentage as a better parameter than BMI for the prediction of low VO2max among players under 18years.