The Effects of Eight Weeks of Lower Eccentric Exercise Training on Muscle Strength and Function in the Elderly

학위논문 (석사)-- 서울대학교 대학원 : 체육교육과, 2016. 8. 송욱.Introduction: Sarcopenia, decreased in muscle mass and function related with aging, was known to be accompanied by muscle strength and physical function. We investigated the effects of eccentric exercise on skeletal muscle strength and physical function in the elderly. Materials and methods: Sixteen healthy older subjects (age, 73.69±2.44Short Physical Performance Battery (SPPB) score ≥10) underwent 8 weeks of eccentric training with Eccentron (BTETM.Inc.) or conventional resistance training with seated leg press (ENRAF NONIUS) for twice a week. For the eccentric training and conventional training group, participants performed the test of isometric, isokinetic, power via Primus RS (BTETM. Inc.), and body composition. For the measurement of functional capacity, subjects performed specific tests (SPPB, gait speed test, stair-climbing test, and chair-rising test). Results: Eccentric training significantly improved in muscle function in gait speed (p=0.049) and stair climb test (p=0.046). Also, the eccentric training produced the greatest improvement in 60°/sec isokinetic average peak torque and power test using isotonic at left side of leg (p=0.040), (p=0.005), respectively. Conclusion: Continuous and regular eccentric exercise program is effective which was to improve the reduction of muscle strength and muscle function that can become noticeable aging. Therefore, these findings suggest that the eccentric exercise training is the one way to improve the prevention of sarcopenia.INTRODUCTION 1 1. Significance of the study 1 2. Purpose of the study 5 3. Research hypothesis 5 4. Limitation 6 LITERATURE REVIEW 7 1. Eccentric Exercise 7 2. Eccentric Exercise Application 9 3. Gait Speed and Balance in elders 10 4. Conventional Resistance Exercise 11 METHOD 12 1. Research Participants 12 2. Experimental design 14 3. Measurement 15 4. Eccentron Exercise Program 19 5. Conventional Resistance Exercise Program 22 6. Data Analysis 23 RESULT 24 1. Body composition and Circumferences 24 2. Physical Activity and Mental State Examination 25 3. Muscle Fatigue (Surface EMG) 27 4. Grip strength 28 5. Gait speed 29 6. Chair rising test 30 7. Stair climb test 31 8. Right knee Isometric 32 9. Left knee Isometric 33 10. Right knee Isokinetic 34 11. Left knee Isokinetic 35 12. Right knee power 36 13. Left knee power 37 Discussion 38 Conclusion 42 References 43 국문 초록 50Maste