Muhammad Saiful Aziz, Sungkowo Sungkowo, Soedjatmiko Soedjatmiko

Analysis of the Relationship Between Leg Muscle Strength and Flexibility and Headkick Results in Kickboxing Athletes in Kendal Regency

Introduction

Analysis of the relationship between leg muscle strength and flexibility and headkick results in kickboxing athletes in kendal regency. Analyze leg muscle strength, flexibility, and headkick results in Kendal Regency kickboxing athletes. Discover significant correlations for flexibility and combined factors.

Abstract

The purpose of this study was to determine: 1) To analyze and describe the relationship between leg muscle strength and headkick results in kickboxing athletes in Kendal Regency. 2) To analyze and describe the relationship between flexibility and headkick results in kickboxing athletes in Kendal Regency. 3) To analyze and describe the simultaneous relationship between leg muscle strength and flexibility and headkick results in kickboxing athletes in Kendal Regency. The author employed a quantitative approach, employing a correlational method. The study was conducted at the Rubelsalu Sports Complex, Taman Khayangan Housing Complex, Svargaloka A 1-2, Jalan Semarang – Campurejo, Kendal Regency, with nine athletes as subjects. Multiple regression analysis was used to analyze the data at a 5% significance level. The estimated r value for the hypothesis 1 test was 0.250 < r table (0.05) (7) (0.666), concluding that there was no significant correlation between kick height and wall squat time in Kendal Regency Kickboxing athletes. The calculated r value of 0.984 > r table (0.05) (7) (0.666) was displayed in the results of the hypothesis 2 test, concluding that there was a significant correlation between flexibility and kick height in Kendal Regency Kickboxing athletes, although there was a fairly strong positive correlation descriptively. The results of the hypothesis 3 test obtained a calculated F result of 115.807 with F table = 5.14, so that F count > F table (1158.807 > 5.14) concluded that there was a significant correlation between leg muscle strength and flexibility with headkick results in Kendal Regency Kickboxing athletes.

Review

This study addresses a pertinent topic within sports science, investigating the relationship between specific physical attributes—leg muscle strength and flexibility—and the performance of headkicks in kickboxing athletes. The stated purpose of analyzing both individual and simultaneous relationships provides a clear framework for the research, aiming to uncover key contributing factors to headkick efficacy. Employing a quantitative, correlational approach is appropriate for exploring these relationships, and the use of multiple regression analysis is suitable for examining the simultaneous effects, offering insights valuable for coaches and athletes in Kendal Regency. The abstract reports distinct findings for each hypothesis. Notably, the study found no significant correlation between leg muscle strength (as measured by wall squat time) and headkick results (kick height). However, a highly significant correlation was identified between flexibility and kick height, suggesting its critical role in this specific kickboxing technique. Furthermore, the combined influence of leg muscle strength and flexibility was found to be significantly correlated with headkick results, underscoring the importance of training both attributes concurrently for optimal performance. These findings offer practical implications, guiding training methodologies towards enhancing flexibility for headkicks, while also highlighting the synergistic effect when combined with strength. While the study provides interesting initial insights, a major limitation that critically impacts the generalizability and statistical power of the findings is the extremely small sample size of only nine athletes. This sample size is insufficient for robust correlational analysis and makes it challenging to draw definitive conclusions applicable to a broader kickboxing population. Additionally, consistent terminology between the broad constructs (e.g., "leg muscle strength," "headkick results") and their specific operational definitions (e.g., "wall squat time," "kick height") needs to be maintained throughout the full paper for clarity. Future research should prioritize a substantially larger and more diverse sample of athletes to validate these initial findings and enhance the reliability and external validity of the conclusions.

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