Heart rate is the most easily measured index of cardiovascular system, which has high research value. By means of literature, experimental research and mathematical statistics, this study tested 9 members of the fitness and bodybuilding training team of Zhejiang College of Shanghai University of Finance and Economics on three strength items (bench press, hard pull and squat). The subjects' maximum heart rate, average heart rate and heart rate after 30 seconds of exercise were tested during low

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... oad resistance training and high load resistance training. Record, analyze and sort out the heart rate changes of the subjects during exercise, so as to compare the heart rate differences of the subjects under three different training methods under different intensity.