Effects of High-intensity Low-volume vs. Low-intensity High-volume Plyometric Training on Athletic Performance and Reactive Strength Index in Taekwondo Athletes

다국어 초록 (Multilingual Abstract)

Effects High-intensity Low-volume vs. Low-intensity High-volume Plyometric Training and Reactive Strength Index in Taekwondo Athletes By Chan-Ho Park Department of Physical Education Graduate School of Kyung Hee University Advised by Dr. Hyun-Chul Jung This study aimed to determine the effects of HILV (High-intensity Low-volume) versus LIHV (Low-intensity High-volume) plyometric training on athletic performance and reactive strength index (RSI) in college Taekwondo athletes. Seventeen Taekwondo athletes (age: 19.4±1.31yrs, height: 165.3±6.70cm, weight: 60.2±8.31kg, BMI: 21.9±1.81kg·m-2) were randomly assigned to a HILV group (n=8) and LIHV group (n=9). Participants completed plyometric training twice a week for 6 weeks, a total of 12 sessions. The intensity and volume of the training were set based on the Intensity Factor (IF) calculated from the ground reaction force, and the number of ground contacts, respectively. Athletic performance tests included Counter Movement Jump (CMJ), Depth Jump (DJ), Agility T-test, and 1RM leg press. The reactive strength index (RSI) was calculated from the height and the ground contact time of the depth jump on a force plate. While agility and leg strength were improved in both groups, greater improvements in CMJ and DJ were observed in the HILV than LIHV groups (p<.05). The RSI was significantly improved only in the HILV group (p<.05). Our findings suggest that training intensity has a greater impact on athletic performance and reactive strength index than the volume of plyometric training in Taekwondo athletes. Keywords Jump ability, stretch-shortening cycle, intensity vs. volume, Poomsae

목차 (Table of Contents)

• 1. Introduction 1
• 1) Purpose of Study 3
• 2) Study Hypotheses 3
• 2. Materials and Methods 4
• 1) Experimental Design 4
• 2) Subjects of the Study 4
• 3) Study Procedures 6
• 4) Training Protocol 8
• 5) Performance Tests 11
• 6) Statistical Analysis 15
• 3. Results 16
• 1) Jump Ability 16
• 2) Reactive Strength Index 16
• 3) Agility 16
• 4) Muscle Strength 16
• 4. Discussion 24
• 1) Athletic Performance 24
• 2) Reactive Strength Index 26
• 5. Conclusion 28
• 6. References 29