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首页> 外文期刊>Canadian Journal of Physiology and Pharmacology >Muscle cellular properties in the ice hockey player: A model for investigating overtraining?
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Muscle cellular properties in the ice hockey player: A model for investigating overtraining?

机译：冰球运动员的肌肉细胞特性：用于研究过度训练的模型吗？

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In this study, we hypothesized that athletes involved in 5-6 months of sprint-type training would display higher levels of proteins and processes involved in muscle energy supply and utilization. Tissue was sampled from the vastus lateralis of 13 elite ice hockey players (peak oxygen consumption = 51.8 ± 1.3 mL·kg -1·min -1; mean ± standard error) at the end of a season (POST) and compared with samples from 8 controls (peak oxygen consumption = 45.5 ± 1.4 mL·kg -1·min -1) (CON). Compared with CON, higher activities were observed in POST (p 0.05) only for succinic dehydrogenase (3.32 ± 0.16 mol·(mg protein) -1·min -1 vs. 4.10 ± 0.11 mol·(mg protein) -1·min -1) and hexokinase (0.73 ± 0.05 mol·(mg protein) -1·min -1 vs. 0.90 ± 0.05mol·(mg protein) -1·min -1) but not for phosphorylase, phosphofructokinase, and creatine phosphokinase. No differences were found in Na +,K +-ATPase concentration (bmax: 262 ± 36 pmol·(g wet weight) -1 vs. 275 ± 27 pmol·(g wet weight) -1) and the maximal activity of the sarcoplasmic reticulum Ca 2+-ATPase (98.1 ± 6.1 μmol·(g protein) -1·min -1 vs. 102 ± 3.3 μmol·(g protein) -1·min -1). Cross-sectional area was lower (p 0.05) in POST but only for the type IIA fibres (6312 ± 684 mm 2 vs. 5512 ± 335 mm 2), while the number of capillary counts per fibre and the capillary to fibre area ratio were generally higher (p 0.05). These findings suggest that elite trained ice hockey players display elevations only in support of glucose-based aerobic metabolism that occur in the absence of alterations in excitation-contraction processes.
机译：在这项研究中，我们假设参加5-6个月冲刺式训练的运动员会表现出较高水平的蛋白质和参与肌肉能量供应和利用的过程。在赛季结束时（POST）从13名精英冰球运动员的股外侧外侧取样组织（峰值耗氧量为51.8±1.3 mL·kg -1·min -1;平均值为±标准误差），并与来自8个对照（峰值耗氧量= 45.5±1.4 mL·kg -1·min -1）（CON）。与CON相比，仅在琥珀酸脱氢酶中POST的活性更高（p <0.05）（3.32±0.16 mol·（mg蛋白）-1·min -1与4.10±0.11 mol·（mg蛋白）-1·min -1）和己糖激酶（0.73±0.05 mol·（mg蛋白质）-1·min -1与0.90±0.05mol·（mg蛋白质）-1·min -1），但不适用于磷酸化酶，磷酸果糖激酶和肌酸磷酸激酶。 Na +，K + -ATPase浓度（bmax：262±36 pmol·（g湿重）-1与275±27 pmol·（g湿重）-1）和肌浆的最大活性没有发现差异网状Ca 2 + -ATPase（98.1±6.1μmol·（g蛋白）-1·min -1对102±3.3μmol·（g蛋白）-1·min -1）。 POST中的横截面积较低（p <0.05），但仅适用于IIA型纤维（6312±684 mm 2与5512±335 mm 2），而每根纤维的毛细管数和毛细管与纤维的面积比一般较高（p <0.05）。这些发现表明，受过训练的精英冰上曲棍球运动员仅在支持基于葡萄糖的有氧代谢方面表现出升高，而这种代谢是在激励收缩过程中没有变化的情况下发生的。

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