There was also a correlation between characteristics of general fitness and special fitness (p < 0.001). Furthermore, changes in special fitness were also demonstrated for the special kickboxing fitness test (SKFT) (p < 0.02), the total number of punches (p < 0.001), punching speed (p < 0.001), and hip turning speed (p < 0.001). Statistically significant differences were found in general fitness in terms of abdominal strength (p < 0.001), pull-ups (p < 0.001), dynamometric measurement of handgrip force (p < 0.001) (kg), clap push-ups (p < 0.001), standing long jump (p < 0.001), shuttle run (p < 0.001), sit-and-reach (p < 0.001), and tapping (p < 0.001). General and special physical fitness of the athletes were diagnosed. The intervention in the study group involved the introduction of CrossFit-based training into a conventional kickboxing training program. Participants were selected by purposive sampling, and the criteria were training experience, sports skill level (minimum class 1 athletes), and consent to participate in the experiment. The study was experimental in nature and was conducted in a group of 60 kickboxers, divided into experimental and control groups. The aim of this study was to determine the effect of modified training based on the principles of CrossFit on the development of general physical fitness in a group of kickboxers compared to a control group. General physical fitness, defined as the effect of the externalization of motor skills, is the basis for athletic training regardless of the sport. Kickboxing is a combat sport that is complex in technique, tactics, and movement structure, and requires an adequate level of motor skills as a foundation for activities during competitions.
Where hurdle hops exercises have a better effect than tuck jump exercises and the control group on leg muscle strength and power. Based on the above analysis it can be concluded that there is an increase in leg muscle strength and power for each group, through the ANOVA test. From the results of the post hoc multiple comparations (LSD) test of independent variables that have a significant influence on the increase in the dependent variable, it can be seen from the mean different results that the hurdle hops group gained 31,900 strength, power 155,367,00, meaning that the hurdle hops exercise was more influential. Paired sample strength test results and paired sample test of leg muscle power test that the significance level of each variable obtained sig 0,000 <0.05 thus there is a significant influence or difference between the pretest and posttest of the dependent variables of leg muscle strength and power, ANOVA test results on leg muscle strength and strength, showing strength, F: 12,191, sig 0,000, Power F: 4,778, sig 0.17, so it can be concluded that there are significant differences in the results of leg muscle strength and strength in three different groups, because sig <0.05. The target of this study was martial arts athlete Kostrad Company-C with 30 members, divided into 3 groups with each group totaling 10 people, this research was conducted for 6 weeks.
The process of data retrieval is done by testing the leg muscle strength using a strength test tool that is a leg dynamometer and leg muscle power test with a jump md, during the pretest and posttest, then the data are analyzed using SPSS 22.0 series. The research method used in this study is quantitative with quasi-experimental methods, with the design of this study using a non-randomize control group pretest and posttest design, with data analysis using ANOVA. The purpose of this study was to analyze the effect of hurdle hops and tuck jump exercises on leg muscle strength and power, as well as the different effects of hurdle hops and tuck jump exercises on leg muscle strength and power.
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