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| 題 名 | Effects of a Single Bout of Intensive Eccentric Contractions at Varying Repetitions on Muscle Damage=單一回合不同反複次數的離心收縮運動對肌肉損傷的影響 |
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| 作 者 | 陳信良; 陳忠慶; | 書刊名 | Annual Journal of Physical Education and Sports Science |
| 卷 期 | 4 2004.12[民93.12] |
| 頁 次 | 頁103-117 |
| 分類號 | 528.9013 |
| 關鍵詞 | 最大等長肌力; 延遲性肌肉酸痛; 血液肌酸激酶活性; 關節活動範圍; Maximal isometric force; MIF; Delayed onset muscle soreness; DOMS; Plasma creatine kinase (CK) activity; Range of motion; ROM; |
| 語 文 | 英文(English) |
| 中文摘要 | 本研究的目的在於,探討受試者進行一回合不同反複次數離心收縮,對引起肌肉損傷及其恢復速度的影響。以36名大學健康男性學生做為受試對象,並以隨機方式將其分派至離心24組 (EC24)、離心50組 (EC50) 及離心70組 (EC70) 之中(每組各12名)。在實驗第1天,要求EC24、EC50和EC70組使用非慣用手的肱二頭肌,各做一回合24、50或70次80%運動前最大等長肌力(MIF)的離心收縮 (ECC),以引起明顯的肌肉損傷。上臂圍、關節活動範圍、MIF以及血液肌酸激酶 (CK) 活性,安排在ECC前和後第 0、1~9天(每間隔24小時)測一次;肌肉酸痛則安排在ECC前以及ECC後的第1~9天測一次。結果發現所有受試者在ECC後,全部依變項均產生顯著的變化 (p<.05);但除了酸痛值無組別差異之外 (p>.05),其他依變項則有組別差異 (EC70>EC50、EC50>EC24)。此結果顯示:(一)肌肉從事越多次的離心收縮,其所引起的損傷程度也就較明顯、肌肉損傷的恢復速度也會較慢;(二)雖然在ECC後會引起明顯的肌肉酸痛,但酸痛的程度似乎與離心收縮次數的多寡無關聯。因此,使用主觀性酸痛做為離心運動引起肌肉損傷的評估方式,可能不是一個非常好的評估指標,而且MIF、ROM、CIR和CK的變化情形,可能也不須要與肌肉酸痛產生相同的反應。 |
| 英文摘要 | This study examined whether performing different repetitions of a single bout of eccentric contractions would cause differing magnitudes of muscle damage and result in different recovery rates. A group of college-age male students (N=36) was recruited for the study. were randomly assigned into 24 (EC24; n=12), 50 (EC50 n=12), They and 70 (EC7O; n=12) eccentric exercise groups. A single bout of intensive eccentric exercise (EGG) was 24, 50, and 70 repetitions for EG24, EG50, and EG70, respectively, on nondominant elbow flexors using a dumbbell that was set at 80% of the pre-ECC MIF level. Upper arm circumference (CIR), ROM, MIF and plasma CK activity were measured before and immediately after ECC, and every 24 hours for 9 consecutive days after EGG for all groups. Muscle soreness was assessed before and for 9 consecutive days after ECC for all groups. There were significant changes (p<.05) in all criterion measures following ECC for all groups. There were dramatic changes (p<.05) in MIF ROM, GIR, and CK for EC70 as compared to EG50 and EG24 following ECC. Moreover there were no significant changes (p>.05) after ECC among groups Furthermore, the recovery rate of MIF ROM, CIR, and CK for ECC for EC70 was slower after ECC among groups. Furthermore, the recovery rate of MIF ROM, CIR, and CK following ECC for EG70 was slower (p<.05) than the EC50 and EC24 groups; and EG50 had a significantly slower (MIF, ROM, CIR, CK, p<.05) recovery rate from muscle damage after ECC than EC24. The results of the present study showed that the larger the number of eccentric contractions, the greater the changes (p<.05) in criterion measures (MIF, ROM, CIR, CK) and the slower the recovery rate (p<.05) of muscle damage after ECC. Moreover there was a significant increase (p<.05) in soreness following ECC for all groups. Therefore, this may provide a possible explanation for the different magnitude of muscle damage from ECC and the different recovery rate of muscle damage after ECC for each group. However muscle soreness following ECC showed no significant differences (p>.05) among groups. Furthermore, use of muscle soreness may not a good indicator of exercise-induced muscle damage, and changes in indirect indicators of muscle damage are not necessarily accompanied with muscle soreness. |
本系統中英文摘要資訊取自各篇刊載內容。