Earticle

초록

영어

Dynamic balance is essential for performance and injury prevention in combat sports, but its relationship with isokinetic strength ratios of the lower extremity and trunk is not well understood. This study investigated the associations between knee, hip, and trunk strength ratios and dynamic balance in elite combat sport athletes. Fifty-one elite judo and wushu athletes (31 males, 20 females) underwent isokinetic testing of the knee, hip, and trunk, with peak torque normalized to body mass (%body weight). Dynamic balance was assessed using the Biodex Balance System SD. Interaction effects between strength ratios and balance variables were analyzed using three-way analysis of variance. Male athletes showed greater muscle strength, whereas female athletes demonstrated better dynamic balance. Higher knee flexor-to-extensor strength ratios (≥61%) and moderate hip (35%–40%) and trunk strength ratios were associated with better dynamic balance. Significant interaction effects were found between knee and hip strength ratios. Our findings suggest that dynamic balance in elite combat sport athletes may depend on the coordinated strength balance of the knee, hip, and trunk rather than on absolute muscle strength alone.

목차

Abstract
INTRODUCTION
MATERIALS AND METHODS
Participants
Isokinetic muscle function test
Dynamic stability test
Physique and body composition
Strength ratio classification
Statistical analysis
RESULTS
Sex differences in body composition
Sex differences in flexion/extension ratios of isokinetic knee, hip, and trunk strength
Sex differences in isokinetic strength of the knee, hip, and trunk
Sex differences in dynamic balance ability
Relationship between isokinetic strength ratios and right overall stability index
Relationship between isokinetic strength ratios and right anterior-posterior stability index
Relationship between isokinetic strength ratios and right medial-lateral stability index
DISCUSSION
Sex differences in body composition, strength, and balance
Knee strength ratio and dynamic balance
Hip strength ratio and dynamic balance
Trunk strength ratio and dynamic balance
Interaction between knee and hip strength ratios
Side dominance and asymmetry
Practical implications for combat sports
CONFLICT OF INTEREST
ACKNOWLEDGMENTS
REFERENCES

키워드

저자

• Jong-Baek Lee [ Center for Sports Science in Gyeongnam, Masan University, Changwon, Korea ]
• Yeong-Jik Kim [ Department of Kinesiology, College of Natural Science, Jeju National University, Jeju, Korea ]
• Tae-Beom Seo [ Department of Kinesiology, College of Natural Science, Jeju National University, Jeju, Korea ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  JER [Journal of Exercise Rehabilitation]

• 간기

  격월간

• pISSN

  2288-176X

• eISSN

  2288-1778

• 수록기간

  2013~2026

• 등재여부

  SCOPUS,KCI 등재

• 십진분류

  KDC 517 DDC 613