目的：本研究在探討靜態伸展與彈震式伸展對等速肌力與肌肉氧飽和度之影響。方法：以18名大學男性運動選手為受試對象（年齡為21.4 ± 2.0歲，身高為179.8 ± 7.8公分，體重為73.8 ± 9.3公斤）。本研究採重覆量數、平衡次序原則的實驗設計，受試者須在等速肌力測驗前，分別接受三種不同實驗處理，每種處理間隔48小時，包括控制處理 (CON) 、靜態伸展處理（SS，3 × 30秒）、彈震式伸展處理（BS，3 × 60秒），伸展過程中利用NIRS監測肌肉氧飽和度。在實驗處理後進行等速肌力 (60°•sec-1、240°•sec-1) 測驗，每種速度進行兩組，每組三次反覆，間隔休息2分鐘，以評估力矩峰值、平均力矩峰值、總作功與平均功率。結果：60°•sec-1力矩峰值的第二組 (BS vs. CON, 3.09 ± 0.36 vs. 2.93 ± 0.28 N•m•kg-1, p < .05) 和兩組平均 (BS vs. CON, 3.02 ± 0.35 vs. 2.88 ± 0.29 N•m•kg-1, p < .05) ，彈震式伸展處理均顯著高於控制處理。60°•sec-1平均力矩峰值的第二組，彈震式伸展顯著高於控制處理。兩組平均部分，彈震式伸展處理顯著優於靜態伸展處理與控制處理 (BS vs. SS vs. CON, 2.86 ± 0.34 vs. 2.74 ± 0.34 vs. 2.71 ± 0.28 N•m•kg-1, p < .05) 。240°•sec-1的力矩峰值、平均力矩峰值和總作功部分，在三種處理間皆無顯著差異。實驗處理時第一組的組織氧合指標，靜態伸展處理顯著低於控制處理 (SS vs. CON, -5.73 ± 6.39 vs. -0.30 ± 4.82 %, p < .05) 。實驗處理時的總血紅素平均值，在靜態伸展處理時，顯著不同於彈震式伸展處理與控制處理（靜態伸展處理 vs. 彈震式伸展處理 vs. 控制處理，-8.60 ± 1.47 vs. -5.14 ± 1.44 vs. 0.36 ± 1.41 μmol，p < .05）。結論：本研究結果顯示，雖然靜態伸展（SS，3 × 30秒）不會抑制隨後的等速肌力表現，但可能會導致肌肉缺氧。此外，彈震式伸展能提高隨後低速度的等速肌力 (60°•sec-1) ，且能改善靜態伸展所引起的肌肉缺氧情形。

Purpose: To investigate the acute effects of the different stretching techniques on the isokinetic strength and muscle oxygen saturation. Methods: Eighteen male collegiate athletes (age, 21.4 ± 2.0 yrs; height, 179.8 ± 7.8 cm; weight, 73.8 ± 9.3 kg) voluntarily participated in this repeated measures and counter-balanced designed study. All subjects were asked to perform three treatments separated by 48 hours, including control (CON), passive static stretching (SS, 3 × 30-sec), and passive ballistic stretching (BS, 3 × 60-sec), before the isokinetic strength test. The muscle oxygen saturation was measured by the near-infrared spectroscopy during treatments. After the treatments, the isokinetic strength (60°•sec-1、240°•sec-1) test, 2 sets of 3 repetitions with 2 min rest interval, was used to assess the peak torque, average peak torque, total work, and average power. Results: The peak torque in 60°•sec-1 at 2nd set (BS vs. CON, 3.09 ± 0.36 vs. 2.93 ± 0.28 N•m•kg-1, p < .05) and average value of two sets (BS vs. CON, 3.02 ± 0.35 vs. 2.88 ± 0.29 N•m•kg-1, p < .05) in BS treatment was significantly higher than those in CON. The average peak torque in 60°•sec-1 at 2nd set in BS was significantly higher than that in CON. The average peak torque at average value of two sets in 60°•sec-1 in BS was significantly higher than those in SS and CON (BS vs. SS vs. CON, 2.86 ± 0.34 vs. 2.74 ± 0.34 vs. 2.71 ± 0.28 N•m•kg-1, p < .05). No significant differences were found on peak torque, average peak torque, and total work in 240°•sec-1 among three treatments. The tissue saturation index during first set of stretching exercise in SS was significantly lower than that in CON (SS vs. CON, -5.73 ± 6.39 vs. -0.30 ± 4.82 %, p < .05). The average values of total haemoglobin during treatments in SS were significantly different from those in BS and CON (SS vs. BS vs. CON, -8.60 ± 1.47 vs. -5.14 ± 1.44 vs. 0.36 ± 1.41 μmol, p < .05). Conclusion: These results indicate that although the SS (3 × 30-sec) might not inhibit subsequent isokinetic strength, stretching in this manner might induce muscle deoxygenation. In addition, the pre-event BS might improve the isokinetic strength in low velocity (60°•sec-1), and attenuate the SS induced muscle deoxygenation.

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