Research Methodology:
The researcher used the experimental method to design one group and the system of pre and post measurements to suit the nature, objectives and procedures of the research.
The research sample:
The research sample was chosen intentionally by Tanta railway club's beginners. The sample included (22) young people under (14) years old and registered in the records of the Egyptian Tennis Federation.
The researcher's reasons for selecting the following research sample:
A. The researcher trains the tennis team at the Tanta Railway Club.
B. The presence of a school for tennis juniors at the Tanta Railway Club.
C. Approval of the Board of Directors of Tanta Railway Club to conduct this research.
The researcher conducted the homogeneity between the members of the research community in the variables (age - weight - height - training age - physical variables - skill variables) of the sample under study, the following is a statistical description of the sample