The different atrength trainings'effect of the 12-14 years of age football players'competence of agility,flexibility,jumping and endurance

The study was conducted with the aim of determining the effects of 8-week different strength training on 12-14 age male fottballer's physical, physiological parametres; flexibility, quickness, leaping and endurance. 24 healthy volunteer footballer participated in the research; 12 participants for experimantal group, 12 participants for control group. While both control and experimental group went on regular football exercise, experimental group, beside regular football exerice, had strength training for two days in a week during 8 weeks Pre-test ( before training) and post test (after training) were done. Physical, physiological parametres of the subjects were analysed in scientifically valid and accepted laboratory and field testing. For Statistical analysis SPSS For Winsows 21,0,For in-group evaluations pariedsample t-test, for inter-group evaluations independentsample t-test were used; p<0,05 and p<0,01 levels were compared for meaningfulness. At the end of 8-week training program, comparing the results of pre-test and post-test of experimental group; values in quickness, flexibility, endyrance, 1200 m running and leaping p<0.001 level, in body weight value p<0.05 level of meaningfulness were found. After 8- week training program, examining the results of pre-test and post-test in control group, betweenb weight and vertical leapping avarage a meaningful difference were found. (p < 0,05). On the otherhand, in control group, between footballers' quickness, flexibility and endurance tests avarages, a meaningful difference were not found. (p > 0,05). Comparing the values in control and experimental group; in pre-testing the meaningfulness was preserved, yet; in post-testing, flexibility, leaping, quickness values 1200 m running and endurance levels, meaningfulbess was found. As a result; for 12-14 age group footballers, 8-week different strength training with regular footbal training has positive effect on flexibility, leaping, quickness and endurance. Key Words: Strength, Football, Speed, Flexibility, Endurance, Training