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題名 | 下坡跑引起肌肉損傷對膝伸肌群速度發展率的影響=Effect of Downhill Run-Induced Muscle Damage on Rate of Velocity Development of the Knee Extensors |
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作者 | 林明儒; 林正常; | 書刊名 | 文化體育學刊 |
卷期 | 15 2012.12[民101.12] |
頁次 | 頁61-71 |
分類號 | 528.9013 |
關鍵詞 | 最大攝氧量; 最大等速向心肌力; 延遲性肌肉酸痛; Maximal oxygen consumption; Maximal concentric strength; Delayed onset muscle soreness; |
語文 | 中文(Chinese) |
中文摘要 | 目的:探討下坡跑(downhill run, DHR)運動引起肌肉損傷(exercise-induced muscle damage, EIMD)對膝伸肌群肌力及速度發展率(rate of velocity development, RVD)之影響。方法:讓22名健康大學男性學生以70%最大攝氧量(maximal oxygen consumption, VO2max)進行一回合30分鐘坡度-17%DHR,並在DHR前、後第0-5天各做一次:最大等速向心肌力(300°/s; concentric peak torque, CPT; RVD)、延遲性肌肉酸痛(delay-onset muscle soreness, DOMS)、血液肌酸激酶(creatine kinase, CK)活性測驗。結果:DOMS在DHR後第1天呈現快速上升,於DHR後第2天達到最大值(49 ± 25 mm),並在DHR後第5天仍未恢復至前測水準(p < .05)。CK在DHR後第1天顯著增加且達到最大值(562 ± 284 IU/L; p < .05),但在DHR後第5天仍未恢復至前測值(329 ± 277 IU/L; p < .05)。在DHR後第0天會使CPT顯著下降17 ± 14%,於DHR後第2天肌力也明顯下降19 ± 4%,但在DHR後第4天已恢復至前測水準。在DHR後第0天會使RVD顯著下降44 ± 49%,在DHR後第2天明顯下降50 ± 47%,但在DHR後第5天已恢復至前測值。DOMS最大值與RVD最小值之間呈現負相關(r = -.72, p < .05)。結論:在DHR後膝伸肌群之RVD可能會受到DOMS症狀影響,雖然在DHR後CPT下降與CK上升可能不會直接造成RVD改變。未來研究可針對DOMS如何影響RVD下降之機制做探討。 |
英文摘要 | Purpose: This study investigated the effect of downhill run-induced muscle damage on the recovery of strength and rate of velocity development (RVD) of the knee extensors. Methods: Twenty-two untrained men (22.0 ± 1.9 yrs) performed a 30-min DHR (downhill run; -17%) at the intensity of their pre-determined 70% maximal oxygen consumption (VO2max). Maximal isokinetic concentric strength (300°/s; concentric peak torque, CPT; RVD), delay-onset muscle soreness (DOMS) and plasma creatine kinase activity (CK) were measured before to 5 days after DHR. All data was analyzed by a one-way repeated measures ANOVA. Results: DOMS developed 1 day after DHR (p < .05), peaked at 2 days (49 ± 25 mm) later, and returned to baseline (p < .05) at 5 days after DHR. Plasma CK increased and peaked at 1 day (562 ± 284 IU/L; p < .05) after DHR, but did not return baseline at 5 days after DHR (329 ± 277 IU/L). Immediately after DHR, CPT decreased to 17 ± 14% and then further slightly decrement of strength at 2 days (19 ± 4%) later, but returned to baseline at 5 days after DHR RVD significantly decreased to 44 ± 49% immediately after DHR, then further decreased at 2 days (50 ± 47%) later, but returned to pre-DHR level at 5 days after DHR. There was a negative correlation between peak DOMS and lowest RVD (r = -.72, p < .05). Conclusion: These results suggested that RVD loss of the knee extensors in the days after DHR may be affected by the symptoms of DOMS, although strength loss and increased in CK after DHR may not directly contributed to changes in RVD. Future studies are warranted to explore how RVD loss affected by DOMS. |
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