Résumé:
Aim of the study:The main goal of our work was to study and analyse the effect ofthe first  preparatory  period  in  soccer,  concerning  the  different  hematological  components for  young  Algerian  soccer  players,  and  also  to  establish  recommendations  for  this population  of  athletes  concerning  the  medical  support  and  its  influence  on  their performances  and  the  customization  of  training  sessions.Methods:23  soccer  players, those  athletes  are  qualified  and  well-trained  players.  They  are  in  good  health  and belong to a team of professional soccer players in first division (Es/Sétif). They followed a  reshaping  program  for  14  weeks,  at  least  6  hours  a  week.  All  the  tests  have  all  been recorded on a special device (at the CHU Saadna Abdenour of Sétif) at the beginning of the season and at the end of the first period of physical training and reshapingsession. The subjects had been informed of the study protocol and signed a consent form and all the procedures of the study had been approved in terms of ethics.Results:We observed a significant improvement in terms of statistics on the experimental groupe