1 کارشناس ارشد تربیت بدنی و علوم ورزشی، دانشگاه بوعلی سینا، همدان
2 استادیار دانشکده تربیت بدنی و علوم ورزشی دانشگاه بوعلی سینا، همدان
عنوان مقاله [English]
The aim of this study was to compare the effect of three selected training methods of physical fitness on hematological factors of adolescent soccer players. 48 adolescent football players participated in this study who were divided into four equal groups (n=12). Group 1 intermittently performed one session of endurance training, one session of strength training, and one session of speed training for 15 sessions; Group 2 performed five sessions of endurance training, five sessions of strength training, and five sessions of speed training; Group 3 performed all three factors of endurance, strength and speed in each session; Group 4 (control group) performed daily football training. Before and after the training protocol (after 12 hours of fasting), 5cc blood was collected from participants' arm veins. Data were analyzed by descriptive and inferential statistics (paired samples t test, ANOVA and Tukey post hoc test) at P˂0.05. Results showed a significant increase in the PLT in group 2 (P=0.029) compared with the pre-training. Also, group 1 showed a significant increase in the RBC (P=0.05) compared with group 2, %Hct (P=0.009) compared with group 2 and (P=0.04) compared with group 3 and (P=0.01) compared with the control group and MCV (P=0.009) and Hb (P=0.02) compared with group 3. Group 3 significantly increased PLT compared with group 1 (P=0.005). It is recommended that a concurrent method of development of physical fitness factors (endurance, strength, speed) should be used in separate training sessions.