Study On The Relationship Between Physical Activity,Cardiorespiratory Fitness And Cognitive Function In The Elderly With Hypertension

Research purposes:our country has rapidly entered an aging society,and chronic diseases are very common in the elderly,especially cognitive impairment,which seriously affects the quality of life of the elderly.Hypertension is not only the most common chronic disease in the elderly,but also an independent risk factor for vascular cognitive impairment.Studies have found that both physical activity and cardiorespiratory fitness can provide positive benefits on cognitive function,but the research on this aspect of elderly people with hypertension is not clear,and the connection between the three is also controversial,so the main research is the following:(1)To analyze the relationship between physical activity,cardiorespiratory fitness and cognitive function in the elderly with hypertension at various risk levels.(2)To explore the mediating effect of cardiorespiratory fitness in the effect of physical activity on cognitive function of the elderly with hypertension.Research methods:A total of 126 elderly people over 60 years old were recruited from 3 elderly care service institutions in Songjiang District,Qingpu District and Yangpu District of Shanghai,and the remaining 80 elderly people who did not meet the requirements and did not complete the test were selected as the research objects.Questionnaire survey was used to collect the basic demographic characteristics,disease status and physical activity of the elderly,and to measure the physical characteristics and blood pressure of the elderly.The cognitive function of the hypertensive elderly was assessed by Mo CA,Digital Sign Switching Test(DSST),and Digit Span Test(DST),and cardiorespiratory fitness was assessed by 6-minute walk test(6MWT).The data were processed and analyzed using SPSS24.0 and EXCEL2010,and partial correlation analysis,stepwise regression and other methods were used to explore the relationship between physical activity,cardiorespiratory fitness and cognitive function in the elderly with hypertension,as well as the relationship of cardiorespiratory fitness in physical activity and cognitive function.mediating effect between them.Research result:(1)A total of 80 hypertensive older adults were included in the study,with 72.5%of the total number of females;31.3% for the middle-aged(70-80 years)and 50.6%for the high-aged adults(80 years or older);more than half of the elderly were obese or had impaired glucose regulation,accounting for 75% and 53.7% of the total,respectively;physical activity,cardiorespiratory fitness and cognitive function were poorer in the very high-risk group than in the rest of the elderly with hypertension.(2)After controlling for age,gender,education level,and disease status,there was no correlation between physical activity and cognitive function in middle-risk and high-risk hypertensive elderly;physical activity and Mo CA total score in very high-risk hypertensive elderly There was a significant positive correlation(r=0.44,p<0.05),and a significant positive correlation with the performance of the digital sign conversion test(r=0.46,p<0.05).(3)After controlling for age,gender,education level,and disease status,the cardiorespiratory fitness of the elderly with moderate-risk hypertension was positively correlated with the performance of the digital sign conversion test(r=0.59,p<0.01),and it was positively correlated with the digital sign conversion test performance(r=0.59,p<0.01)The performance was positively correlated(r=0.76,p<0.01),and it was positively correlated with the total score of the digital breadth test(r=0.61,p<0.01);the cardiorespiratory fitness of the elderly with high-risk hypertension was not significantly correlated with its cognitive function;The cardiorespiratory fitness of the very high-risk hypertensive elderly was positively correlated with the total Mo CA score(r=0.60,p<0.01),and positively correlated with the performance of the digital sign switching test(r=0.53,p<0.01).(4)After controlling for age and gender,physical activity in middle-risk hypertensive elderly was significantly positively correlated with cardiorespiratory fitness(r=0.49,p<0.05);physical activity in high-risk hypertensive elderly was significantly positively correlated with cardiorespiratory fitness(r=0.49,p<0.05).=0.62,p < 0.01);physical activity was significantly positively correlated with cardiorespiratory fitness in the elderly with high-risk hypertension(r = 0.63,p < 0.1).After controlling for age,education level and disease status,cardiorespiratory fitness played a mediating role in the effect of physical activity on cognitive function in the elderly with hypertension [95% Boot CI=0.048-0.283].Analysis conclusion:(1)The subjects in this study were mostly female middle-aged and high-aged elderly people.As the risk level increased,the systolic blood pressure,pulse pressure difference and years of illness in hypertensive elderly people gradually increased,which may have led to a gradual decrease in their performance on cognitive function tests.(2)In this study,a significant positive correlation between physical activity and cognitive function was observed in the very high-risk class of hypertensive elderly people,but the correlation was not significant in the intermediate and high-risk classes of hypertensive elderly people.(3)The healthier the cardiorespiratory fitness of hypertensive elderly people,the better their cognitive performance,and this feature was more pronounced in the poorer cardiorespiratory fitness group of hypertensive elderly people.(4)Hypertensive elderly people with higher levels of physical activity had better cardiorespiratory fitness,and physical activity in hypertensive elderly people could have a beneficial effect on cognitive function by improving their cardiorespiratory fitness.