Payame Noor University Research in School and Virtual Learning 3060-6497 9 3 2022 02 20 Comparison of the Effect of Linear and Non-Linear Training on the Coordina-tion Pattern of Drop forehand Badminton Skills in Adolescent Girls Comparison of the Effect of Linear and Non-Linear Training on the Coordina-tion Pattern of Drop forehand Badminton Skills in Adolescent Girls 53 62 8519 10.30473/etl.2022.60517.3600 FA Farnaz Torabi Associate Professor, Physical Education Department, Payame Noor University, Tehran, Iran Masome Momtazi MA of Physical Education Department, Payame Noor University, Tehran, Iran Journal Article 2021 08 23 The aim of this study was to compare the effect of linear and nonlinear training on the coordination pattern of drop forehand badminton skills of adolescent girls in Tehran. The research method was quasi-experimental and was performed as pretest and posttest. The statistical population of the present study consisted of all adolescent girls aged 10 to 12 years in Shiroodi Club, District 7 of Tehran. The statistical sample of this study consisted of 30 beginner girls in badminton who had less than 3 months of experience in badminton, who were selected by purposive sampling and randomly divided into two groups of linear and nonlinear training. Thirty participants were trained in drop forehand skills using linear and nonlinear training methods. The linear method was designed and implemented based on traditional and conventional methods and in contrast to the nonlinear method derived from ecological dynamics using task constraints (rules related to activity and equipment). For data analysis, descriptive (mean and standard deviation) and inferential (paired t-test and analysis of covariance) statistical methods were used on SPSS software version 22. The results of the present study showed that the two groups had a significant difference in the pattern of coordination and accuracy of drop forehand skills and the nonlinear training group had better performance than the linear group (p <0.05). The results of the present study showed that nonlinear training is a good method to improve the coordination patterns of drop forehand badminton skills in adolescents. The aim of this study was to compare the effect of linear and nonlinear training on the coordination pattern of drop forehand badminton skills of adolescent girls in Tehran. The research method was quasi-experimental and was performed as pretest and posttest. The statistical population of the present study consisted of all adolescent girls aged 10 to 12 years in Shiroodi Club, District 7 of Tehran. The statistical sample of this study consisted of 30 beginner girls in badminton who had less than 3 months of experience in badminton, who were selected by purposive sampling and randomly divided into two groups of linear and nonlinear training. Thirty participants were trained in drop forehand skills using linear and nonlinear training methods. The linear method was designed and implemented based on traditional and conventional methods and in contrast to the nonlinear method derived from ecological dynamics using task constraints (rules related to activity and equipment). For data analysis, descriptive (mean and standard deviation) and inferential (paired t-test and analysis of covariance) statistical methods were used on SPSS software version 22. The results of the present study showed that the two groups had a significant difference in the pattern of coordination and accuracy of drop forehand skills and the nonlinear training group had better performance than the linear group (p <0.05). The results of the present study showed that nonlinear training is a good method to improve the coordination patterns of drop forehand badminton skills in adolescents. https://etl.journals.pnu.ac.ir/article_8519_22f552956462f08b3d7e0bf93489aa44.pdf