Dose-effcet Relationship Between Physical Activity And Cardiopulmonary Endurance?Cardiovascular Health In Sedentry Behaviors Middle-Aged Female

Objective: 40-49 age group is in the peak of cardiopulmonary function decline,lack of reflect the function of the index group.To analyze whether there is a dose-response relationship between different exercise and cardiopulmonary fitness and cardiovascular health,and to provide a basis for better guidance and exercise prescription for middle-aged women to sit and participate in sports activities.METHODS: A questionnaire was conducted on physical activity questionnaire for women aged 40-49 years old,and 89 subjects who met the experimental requirements were further screened.83 exercise subjects were enrolled in a three-month exercise trial with different doses of exercise and were randomly divided into four groups:(1)no exercise control group;(2)a small amount of Medium intensity group;(3)small amount of high intensity group;(4)a large number of medium intensity group.(40-55% HRR)and high intensity(60-80% HRR),the single exercise volume also includes the small amount of exercise(30min / ml),and the exercise intensity is the two-factor control for exercise and exercise intensity.Times)and large amount of exercise(60min / time).Logistic regression analysis was used to analyze the risk factors(covariate)and high density lipoprotein cholesterol(LDL)as the protective factors,analysis of different exercise and cardiopulmonary fitness and cardiovascular health between the existence of a dose-effect relationship.Results: The relationship between cardiopulmonary endurance group and cardiovascular health group was mainly reflected in the first dimension.The cardiopulmonary endurance indexes of different groups before and after the experiment showed a certain change.There was no significant difference between the two groups before and after the experiment(p> 0.05).CONCLUSIONS: A moderate intensity exercise of 180 min per week has a certain effect on the improvement of blood pressure,and this threshold effect exhibits a smooth curve relationship.The total cholesterol and the triglyceride values in the medium-intensity group decreased with the increase of exercise time,and the low-density lipoprotein in the small intensity group(90 min / week)(180 min / week)of low density lipoprotein values showed a smooth descending curve with the increase of exercise time.