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应用透射电镜对冷水组 (4℃和 10℃ )、温水组 (2 5℃ )和对照组小鼠心肌细胞超微结构作了观察。结果表明 ,冷水组中 4℃和 10℃实验组小鼠心肌细胞超微结构变化无明显区别 ,其心肌细胞质内有大量的线粒体。线粒体体积大、分布密集 ,嵴间基质中有丰富的嗜锇颗粒。心肌细胞内糖元颗粒显著增加 ,呈簇状或单个分布。在电镜下观察 ,冷水组小鼠心肌细胞超微结构未见损伤性改变。温水组小鼠心肌细胞内的线粒体 ,嗜锇颗粒和糖元类似于对照组。结果提示 ,长期和适度的冷水游泳有助于改善心肌细胞的超微结构 ,提高心肌细胞的能量代谢和能量贮备 ,促进心肌细胞的活性。提示 ,长期、适度的冬泳有助于提高人类心脏功能。
Transmission electron microscopy was used to observe the ultrastructure of cardiomyocytes in cold water group (4 ℃ and 10 ℃), warm water group (25 ℃) and control group. The results showed that there was no significant difference in ultrastructural changes of cardiomyocytes in 4 ℃ and 10 ℃ experimental groups in cold water group, and there were a large number of mitochondria in myocardial cytoplasm. Mitochondria are bulky, densely distributed and rich in osmiophilic particles in the matrix between crest. Glycogen granules in myocardial cells increased significantly, clustered or single distribution. Under electron microscope, there was no change in the ultrastructure of myocardial cells in cold water group. Mitochondria, osmiophilic granules and glycogen in the warm water group were similar to those in the control group. The results suggest that long-term and moderate cold water swimming can improve myocardial ultrastructure, increase energy metabolism and energy storage of cardiomyocytes, and promote myocardial cell activity. Tip, long-term, moderate winter swimming helps improve human heart function.