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چکیده
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Abstract Introduction: The role of physical fitness in improving the implementation of skills, techniques and tactics in athletes of various sports fields, including combat sports, is very important. The purpose of this study was to investigate the effect of crossfit exercises on physical fitness factors (aerobic power, anaerobic power, speed and agility) and blood lactate response in female professional taekwondo athletes.
Method: This study is semi-experimental and its statistical population consists of female taekwondo athletes in Kermanshah city. According to the criteria for entering the study, 20 athletes as available subjects with an age range of 16-35 years and with at least 8 years of experience in sports competitions selected and were randomly divided into two groups of Crossfit (n=10) and control (n=10). The training protocol included 6 weeks of CrossFit training (three sessions per week, and each session was 60 minutes), which was done in compliance with the principle of overload. In the pre and post-test, to measure the studied variables, the 45-meter sprint test was used to evaluate speed, the T-Test was used to evaluate agility, the RAST test was used to evaluate anaerobic power, and the shuttle run test (SRT) was used to evaluate aerobic power. Also, to evaluate changes in blood lactate before and after the intervention of the six-week exercise program, after performing an acute maximum exercise including the Buruce test on the treadmill before exercise and 48 hours after the last exercise session were evaluated through blood sampling. The data were analyzed using the correlation t test and ANOVA using SPSS version 24 software at a significance level of p≥0.05.
Results: The results of the correlated t-test were showed that the average values of speed (p=0.001), agility (p=0.002), aerobic power (p=0.045), anaerobic (p=0.001), and blood lactate level (p=0.001) in the exercise group improved significantly in the post-test compared to the pre-test. And t
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