https://scholars.lib.ntu.edu.tw/handle/123456789/158909
標題: | Effects of flexibility training on eccentric exercise-induced muscle damage | 作者: | Chen, Che-Hsiu Nosaka, Kazunori Chen, Hsin-Lian Lin, Ming-Ju Tseng, Kuo-Wei Chen, Trevor C. |
關鍵字: | muscle soreness; muscle strength; optimum angle; passive range of motion; Proprioceptive neuromuscular facilitation; static stretching | 公開日期: | 2011 | 起(迄)頁: | 491-500 | 來源出版物: | Medicine & Science in Sports & Exercise | 摘要: | Purpose: This study investigated whether flexibility training would attenuate muscle damage induced by maximal eccentric exercise. Methods: Thirty untrained young men were allocated to static stretching (SS), proprioceptive neuromuscular facilitation (PNF), or control group (n = 10 per group). The SS consisted of 30 sets of a 30-s standard SS with a 30-s rest between sets, and the PNF included 5 sets of the 30-s standard SS followed by 3 sets of three "contract-relax-agonist-contract" procedures. These were performed three times a week for 8 wk, and all subjects performed six sets of 10 maximal isokinetic (30°?s) lengthening contractions of the knee flexors after the 8-wk training or 8 wk after the baseline measures (control). Changes in indirect markers of muscle damage before and for 5 d after the eccentric exercise were compared among the groups. Results: The range of motion (ROM) of the hip joint increased by 25°, and the optimum angle of the knee flexors shifted (P < 0.05) to a longer muscle length by 10° after training, without significant differences between SS and PNF. No significant changes in these variables were evident for the control group. Compared with the control group, the SS and PNF groups showed significantly (P < 0.05) smaller decreases and faster recovery of knee flexor muscle strength and smaller changes in optimum angle, ROM, muscle soreness, and plasma creatine kinase activity and myoglobin concentration without significant differences between the groups. The preeccentric exercise ROM or optimum angle was significantly (P < 0.05) correlated with the changes in the muscle damage markers. Conclusions: These results suggest that both SS and PNF training are effective in attenuating eccentric exercise-induced muscle damage and that flexible muscles are less susceptible to the damage. ? 2011 by the American College of Sports Medicine. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/239739 | DOI: | 10.1249/MSS.0b013e3181f315ad | SDG/關鍵字: | creatine kinase; myoglobin; adolescent; adult; article; blood; hip; human; injury; joint characteristics and functions; knee; male; muscle contraction; muscle strength; physiology; skeletal muscle; stretching exercise; Adolescent; Creatine Kinase; Hip Joint; Humans; Knee; Male; Muscle Contraction; Muscle Strength; Muscle Stretching Exercises; Muscle, Skeletal; Myoglobin; Range of Motion, Articular; Young Adult |
顯示於: | 物理治療學系所 |
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