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对健康雄性大鼠力竭性游泳前后股四头肌深层肌蛋白质、ＤＮＡ、总ＲＮＡ、肌动蛋白（ＤＮａｓｅⅠ抑制法）和α－肌动蛋白ｍＲＮＡ（地高辛标记探针，Ｎｏｒｔｈｅｒｎ杂交）含量的动态观察显示：肌肉蛋白质含量游后６～１２ｈ明显升高；总ＲＮＡ含量游后即刻明显下降，１２ｈ后回升到安静时水平；游泳后Ｆ－肌动蛋白升高的趋势不明显，Ｇ－肌动蛋白下降，１２ｈ后回升，Ｔ－肌动蛋白表现出游后逐步下降，１２ｈ后出现上升的趋势；α－肌动蛋白ｍＲＮＡ的表达游后即刻略增高，６ｈ达最高，１２ｈ基本回降到安静时水平。这些变化显示了游泳运动后，大鼠骨骼肌肌动蛋白及其基因表达，以及蛋白质、ＤＮＡ和总ＲＮＡ代谢的特点。
The contents of protein, DNA, total RNA, actinase (DNase Ⅰ inhibitor) and α-actin mRNA (digoxigenin-labeled probe, Northern blot) in deep quadriceps muscle of healthy male rats before and after exhaustive swimming The dynamic observation showed that muscle protein content increased significantly from 6 to 12 hours after swimming, the content of total RNA decreased significantly immediately after swimming and recovered to a resting level after 12 hours. The increase of F-actin after swimming was not obvious, Actin decreased after 12h, T-actin showed a gradual decline after the game, 12h after the rise trend; α-actin mRNA expression slightly increased immediately after swimming, reaching the highest at 6h, 12h basic back down to Quiet time level. These changes show the characteristics of rat skeletal muscle actin and its gene expression, as well as protein, DNA and total RNA metabolism after swimming.