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雄性Fisher 344大白鼠,开始训练时,青年组4～5月龄,老年组21月龄,训练终止时,分别为9～11和24～26个月。运动组大鼠在电动跑车内跑步,每周5天,每天30～60分钟,速度分别为1.2和0.9千米/小时。除跑车不转动外,对照组的处理同运动组。训练结束后,取大鼠右室乳头肌用改良生理盐溶液非循环灌流乳头肌作等长收缩,每分钟12次。实验均在最适初长住进行。灌流液温度为28、32、35和38℃四个等
Male Fisher 344 rats started training at 4 to 5 months in the youth group, 21 months in the aged group and 9 to 11 and 24 to 26 months at the end of the training. Exercise rats in the electric sports car running 5 days a week, 30 to 60 minutes a day, the speed was 1.2 and 0.9 km / h. In addition to sports car does not rotate, the control group deal with the exercise group. After training, take the rat right ventricular papillary muscle with modified saline solution non-circular perfused papillary muscles for equal length contraction, 12 times per minute. Experiments were carried out in the most suitable long live. Perfusion fluid temperature of 28,32,35 and 38 ℃ four and so on