常壓高氧降低女性運動員阻力運動後恢復

Normobaric Hyperoxia Decreases Recovery After Resistance Exercise in Female Athletes

楊孫錦(Sun-Chin Yang) ； 王潔玲(Chieh-Ling Wang) ； 廖進安(Chin-An Liao) ； 陳奕良(Yi-Liang Chen)

《大專體育學刊》 22卷2期 (2020/06) Pp. 167-180

https://doi.org/10.5297/ser.202006_22(2).0006

摘要

本研究之目的為探討常壓高氧對於單次高強度阻力運動後恢復之影響。本研究為隨機雙盲交叉試驗設計，共招募10名女性運動員（年齡21.0±1.0歲）作為受試者，並將其隨機分為常氧組（normoxia group, NG）與高氧組（hyperoxia group, HG），並進行單次高強度阻力運動以引起肌肉損傷。於運動後立即給予75g葡萄糖水溶液。NG與HG受試者於運動後分別以面罩與雙通閥（two-way non-rebreathing valves）供給90分鐘的常壓常氧（FiO_2=0.21）或高氧（FiO_2=0.60）。此除之外，於運動前後測量上下肢肌肉力量，並以血液量測葡萄糖耐受度、肌肉損傷、發炎、氧化壓力與心律變異度（heart rate variability, HRV）指標。研究結果顯示NG阻力運動後血液肌酸激酶（creatine kinase, CK）、硫化巴比妥酸反應物（thiobarbituric acid-reactive substances, TBARS）與介白素6（interleukin6,IL-6）增加，HRV之高頻功率（high frequency, HF）顯著降低。而HGTBARS濃度之變化於運動後30～60分鐘顯著高於NG，IL-6則於同時間點顯著低於NG。儘管如此，兩組間的CK與HRV指標於各時間點均無顯著差異。除此之外，HG運動後血糖與胰島素曲線下面積顯著高於NG。於運動表現方面，HG二頭肌力量於運動後90分鐘顯著低於前測，於運動後24小時顯著低於NG。本研究結論為高氧下恢復會增加阻力運動引起的氧化壓力與降低葡萄糖耐受度，此外也可能影響肌肉力量之恢復。

關鍵字

氧化壓力 ； 發炎 ； 心律變異度

並列摘要

This study aimed to investigate the effect of acute hyperoxia on recovery following resistance exercise. Ten female athletes participated in this crossover study and were divided into normoxia group (NG) and hyperoxia group (HG). All subjects performed an acute resistance exercises (3 sets, 6 repetitions/set, 85% 1 repetition maximum [1RM]). Seventy-five g glucose was administered to all subjects immediately after exercise. Normoxic (FiO_2 = 0.21) and hyperoxic (FiO_2 = 0.60) air was respectively supplied to the athletes of both groups by two-way non-rebreathing valves and masks for 90 min after exercise. Isometric biceps muscle strength, standing long jump, glucose tolerance, heart rate variability (HRV), and circulating markers of muscle damage, inflammation, and oxidative stress were determined before and after exercise. Results indicated that creatine kinase (CK), thiobarbituric acid-reactive substances (TBARS), and interleukin 6 (IL-6) were increased, but high frequency (HF) power was significantly decreased after acute resistance exercise in NG. The TBARS level of HG was significantly higher, and IL-6 level was lower than that of NG at 30 and 60 min after exercise. However, CK and HRV markers showed no significant difference between NG and HG at all time points. Glucose tolerance tests showed that blood glucose and insulin area under the curve (AUC) were higher in HG than that of in NG. Furthermore, isometric biceps muscle strength in HG was significantly decreased 90 min after exercise, and was significantly lower than that of NG 24 h after exercise. In conclusion, these results indicate that recovery under hyperoxia may induce more oxidative stress, and decrease glucose tolerance and performance after acute resistance exercise.

並列關鍵字

oxidative stress ； inflammation ； heart rate variability

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