Effects Of High Intensity Intermittent Training On Cardiovascular Function Of College Students

Objective:To understand the cardiovascular function status of college students before and after 12 weeks of high-intensity interval training(HIIT)intervention,analyze the changes of various indicators before and after training,and understand the effect of HIIT on the cardiovascular function of college students.Provide a reference for improving the cardiovascular function status and health promotion of college students.Methods:80 college students(40 males and 40 females)from Inner Mongolia Normal University were selected.The subjects completed a12-week HIIT training program,using blood pressure monitors,spirometers,Omega Wave 3.0 physiological function testing system,and Cortex Meta Max3B cardiopulmonary.The function tester tests the rest heart rate,blood pressure,vital capacity,VO₂max,maximum heart rate and HRV before and after the training intervention,and analyzes the changes of various indicators before and after training.The SPSS25.0software was used for statistical analysis,and the paired sample t test was used,and the significance level was set as P<0.05;the chi-square test was performed on the time domain index of heart rate variability(HRV)and the distribution of the number of people in the normal range of heart function index.Results:(1)After HIIT intervention,the resting heart rate(beats/min)of boys and girls was significantly lower than before training(P<0.01).Among the blood pressure(mm Hg)indicators,the diastolic blood pressure of boys was significantly lower(P<0.01).There was no significant difference in the changes of male and female systolic blood pressure and female diastolic blood pressure(P>0.05).(2)After HIIT intervention,male and female vital capacity(ml)were significantly higher than before training(P<0.01).(3)After HIIT intervention,the distribution of the normal range of Avag and Asym was significantly higher than that before training(P<0.05),and the distribution of the normal range of TI number of female students was significantly higher than that before training(P<0.05).SDNN(ms),RMSSD(ms),SDSD(ms)and PNN50(%)time domain indicators and TP(ms),HF(ms),LF(ms),VLF(ms),LF/HF(%),There was no significant difference in the changes of HRV-related indicators such as LF norm and HF norm frequency domain indicators(P>0.05).(4)After HIIT intervention,VO₂max(ml/min),VO₂max(ml/min/kg),minute ventilation(L/min),maximum oxygen uptake load(W)and other aerobic work ability indicators are compared with those before training Both were significantly improved(P<0.05),and there was no significant difference in the change of maximum heart rate(beats/min)(P>0.05).Conclusion:(1)High-intensity intermittent training can improve college students'ventilator function,enhance cardiopulmonary function,and improve their aerobic working ability.(2)high-intensity interval training enhances college students'heart rate reserve and has positive effect on cardiac function;the sympathetic-vagus nerve balance shows vagal trend,effectively improving the autonomic regulation function.(3)high-intensity interval training can improve the heart function of college students and improve the overall level of heart function adjustment ability.(4)High-intensity intermittent training can improve the cardiovascular function of college students.