| Objective:Health-related physical fitness is strongly associated with health,which includes body composition,cardiorespiratory fitness,muscle strength,muscle endurance,body flexon and banlance.This study investigated blood pressure,health-related physical fitness and lifestyles(physical activity,pressure,quality of sleep)among college teaching and administrative staff aged 25?59 years,and aimed at providing reference data for the exercise prescription to prevent hypertension through researching the characteristics of health-related physical fitness changes by age and finding the key elements of health-related physical fitness that affect hypertension.Methods:College teaching and administrative staff aged 25?59 years were collected willingly in Shaanxi Normal University incluidng 246 males and 292 females in a designated hospital where they performed medical examinations,questionnaire filling,and health-related physical fitness test.College teaching and administrative staff aged 25?59 years were collected willingly in Shaanxi Normal University incluidng 246 males and 292 females in a designated hospital where they performed medical examinations,questionnaire filling,and health-related physical fitness test.Medical examinations include regular physical examination items such as blood pressure;?International Physical Activity Questionnaire?,?Pittsburgh Sleep Quality Index?and?Chinese 14-item Perceived Stress Scale?were used to evaluate the levels of physical activity,and pressure index and stress.Health-related fitness indexes included:body mass index,percentage body fat,waist-hip ratio,waist,Index of Harvard Step Experiment,vital capacity,handhandgrip strength,vertical jump,1 min push-ups(male)/sit-ups(females),sit-and-reach test,one leg standing with eyes closed,and Choice Reaction Time.SPSS was used to do EM algorithm,Pearson correlation analysis,one-way ANOVA,multiple linear regression analysis and binary logistic regression analysis.Results:(1)Characteristics of health-related physical fitness changes by age:the indicators of the Index of Harvard Step Experiment,vital capacity,vertical jump,1 min push-ups(male)/sit-ups(females),sit-and-reach test,one leg standing with eyes closed varies among the 7 age groups(P<0.01),while handhandgrip strength and choice reaction didn't change much(P>0.05).(2)Correlation analysis between body composition and other indicators of health-related physical fitness:?BMI:BMI of males is positively correlated with handhandgrip strength,P<0.01,the correlation coefficient is 0.205;BMI of female was positively correlated with handhandgrip strength,P<0.01,the correlation coefficient was 0.278,and showed negative correlations with 1 min sit-ups and sit-and-reach test,P<0.01,the correlation coefficients were-0.182,-0.165,and correlation coefficients with vital capacity and choice reaction were 0.115,0.125,P<0.05.?Waist:male waist was positively correlated with handhandgrip strength,P<0.01,the correlation coefficient was 0.182;female waist is positively correlated with handhandgrip strength,P<0.01,the correlation coefficient was 0.181,and had negative correlations among sit-and-reach test,one leg standing with eyes closed,1 min sit-ups,P<0.01,the correlation coefficients were-0.214,-0.210,-0.196;the handhandgrip strength of normal waist male was significantly lower than central obese males,and the Index of Harvard Step Experiment of the pre-obesity males was significantly higher than that of central obese ones,P<0.05.?The handgrip strength of females with normal waist was significantly lower than that of pre-obesityones,and the number of 1 min sit-ups of central obese teachers was significantly lower than that of normal and pre-obesity ones,P<0.05;The normal waist female ones' standing time of one leg standing with eyes closed and distance of sit-and reach were significantly greater than those with central obesity,P<0.05.?WHR:Men's WHR is negatively correlated with push-ups,with a correlation coefficient-0.207,P<0.01,and negatively correlated with vital capacity,sit-and-reach test,and one leg standing with eyes closed,the correlation coefficient is-0.129,-0.157,-0.156,P<0.05;female WHR was positively correlated with handgrip strength,the correlation coefficient was 0.159,P<0.01,and negatively correlated with sit-and-reach test,one leg standing with eyes closed and 1 min sit-ups,the correlation coefficient was-0.214,-0.210,-0.196,P<0.01,and negatively correlated with the the Index of Harvard Step Experiment,the correlation coefficient wass-0.141,P<0.05.?PBF:vital capacity,1 min push-ups,were negatively correlated with PBFof male,with the correlation coefficients of-0.254,-0.251,-0.221,P<0.01;PBFof female was negatively correlated with sit-and-reach,one leg standing with eyes closed,vertical jump,and 1 min sit-ups,and the correlation coefficient were-0.204,-0.182,-0.162,-0.240,p<0.01,and also negatively correlated with the the Index of Harvard Step Experiment,the correlation coefficient was-0.122,P<0.05.(3)Correlation analysis between lifestylesand health-relatedphysical fitness:?The level of moderate physical activity in men was positively correlated with 1 min push-ups and vital capacity,the correlation coefficients were 0.250,0.166,P<0.01;the level of severe physical activity and total physical activity had a positive correlation between handgrip strength and 1 min push-ups,the correlation coefficients were 0.186 and 0.316,P<0.01.The score of out of control and pressure was negatively correlated with handgrip strength,and the correlation coefficients were-0.193,-0.158,P<0.01;sleep quality was negatively correlated with handgrip strength,and the correlation coefficient was-0.133,P<0.05;?Moderate physical activity was positively correlated with handgrip strength,the correlation coefficient was 0.165,P<0.01,with whichl min sit-ups,vertical jump,height,and vital capacity were weakly correlated,and the correlation coefficients were between-0.121 and 0.127,P<0.05;Severe physical activity was positively correlated with handgrip strength,1 min sit-ups,sit-and-reach test,and the Index of Harvard Step Experiment,and the correlation coefficient r ranges from 0.174 to 0.211,P<0.01;the total amount of physical activity is positively correlated with handgrip strength and the Index of Harvard Step Experiment,and the number of relations were 0.158,0.156,P<0.01;the score of out of control and pressure is positively correlated with the Index of Harvard Step Experiment,the correlation coefficients were 0.232,0.224,P<0.01;the quality of sleep was negatively correlated with handgrip strength,1 min sit-ups,and vertical jump,with a correlation coefficient between-0.181 and-0.152,P<0.01.(4)Multiple linear regression analysis showed that:?Gender,age,BMI,the Index of Harvard Step Experiment had a linear relationship with systolic blood pressure,and the regression model has statistical significance,F=23.527,P<0.001,adjusted R2=0.316.For every 10-year increase in age,the body's systolic blood pressure increases by 4.06 mmHg;For each additional unit of BMI,the systolic blood pressure increases by 0.77 mmHg,and for every 10 units of the Index of Harvard Step Experiment increase,systolic blood pressure decreases by 2.02 mmHg;? It also showed a linear relationship existed between gender,age,BMI,the Index of Harvard Step Experiment,vertical jump,one leg standing with eyes closed and diastolic blood pressure.The regression model was statistically significant,F=23.358,P<0.001,adjusted R2=0.294,and the diastolic blood pressure increased 2.56 mmHg with each 10-year increase in age,for each additional unit of BMI,systolic blood pressure increases by 0.926 mmHg;For every 10 units of the Index of Harvard Step Experiment increase,systolic blood pressure decreases by 2.45 mmHg;For every 10cm increase in vertical jump,diastolic blood pressure decreases by 1.11 mmHg;One leg standing with eyes closed increased for 10 seconds,diastolic blood pressure decreased by 0.32 mmHg.(5)Binary logistic regression analysis showed that:gender,age,BMI,waist,Z-score of the Index of Harvard Step Experiment can effectively predict the risk of hypertension,P<0.05,and 89.2%of the subjects could be classified,with a sensitivity of 21.7%and a specificity of 99.1%.Female are 4.196 times more likely to suffer from hypertension than men;every 1 year of age increases the risk of hypertension by 6.9%;each additional unit of BMI increases the risk of hypertension by 21.2%;One unit of Z-score of the Index of Harvard Step Experiment increased,the the prevalence of hypertension reduced by 30.2%.Conclusions:(1)Among male or female college teaching and administrative staffin the age range of 25?59 years,cardiopulmonary fitness level increased with age,while muscle endurance decreases with age,and muscle endurance was positively correlatedwith cardiopulmonary fitness,balance and flexibility.(2)The muscle strength increased with BMI and waist circumference in male and female college teaching and administrative staff at the age of 25?29 years,on the contrary,the muscular endurance decreased with the increase of WHR and PBF.For female college teaching and administrative staff,waist circumference was the main factors that affectedtheir muscular endurance,balance and flexibility.(3)Moderate and severe physical activity promoted cardiopulmonary fitness,muscle strength,muscle endurance,and balance of thecollege teaching and administrative staff.(4)Tension and stress levels were negatively related to blood pressure,and health-related physical fitness indicators were related to blood pressureexcept for muscle endurance;BMI,waist circumference,and step test index could predict hypertension in college teaching and administrative staff.And the exercise guidelines for hypertensive patients need to be based on reducing BMI and waist circumference,and improving cardiopulmonary fitness,as well as taking age and gender into account. |
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