Relationship Between Overweight And Obesity And Resting Heart Rate Among Middle-aged And Elderly Individuals

Objective To investigate the correlation between overweight and obesity and resting heart rate(RHR)in middle-aged and elderly people.Methods This study extracted the baseline data of"REACTION study"in Lanzhou area and 6215 residents were finally included.Questionnaire surveys,physical examinations,laboratory examination,body mass index(BMI)and RHR were collected and analyzed.The subjects were divided into underweight group,normal weight group,overweight and obesity group according to BMI;According to normal RHR,the research subjects were divided into four groups:Q1(RHR<60bpm),Q2(60≤RHR<80bpm),Q3(80≤RHR<100bpm)and Q4(RHR≥100bpm).Partial correlation analysis was used to explore the correlation between overweight and obesity and RHR.The relationship between RHR and overweight and obesity was analyzed by binary logistic regression analysis.Results(1)The average BMI of the study subjects was(23.98±3.28)kg/m~2,and the males were higher than the females(24.31±2.97kg/m~2 vs 23.90±3.35kg/m~2,P<0.05).The average RHR was(78.1±10.9)bpm,and the females were higher than the males(78.3±10.8bpm vs 77.4±11.4bpm,P<0.05).The prevalence of overweight was 37.5%,and the prevalence of obesity was 9.7%.The prevalence of overweight in males was higher than in females(44.1%vs 36.0%,P<0.05).There was no statistical difference in obesity rates between males and females(P>0.05).(2)Covariance analysis showed that the RHR level of underweight group,normal weight group,overweight group and obesity group in the general population were(79.9±1.0)bpm,(78.0±0.2)bpm,(77.9±0.2)bpm and(78.9±0.4)bpm,respectively.The RHR was highest in the underweight group(P<0.05).After adjusting for a variety of confounding factors,the RHR level of underweight group,normal weight group,overweight group and obesity group in the general population were(81.1±0.8)bpm,(78.4±0.2)bpm,(77.6±0.2)bpm and(77.9±0.4)bpm,and the RHR was highest in the underweight group.The RHR was lowest in the obesity group in males(P<0.05).(3)The prevalence of obesity in the Q4 group was the highest at 10.8%in the general population(P<0.05),and that was 12.7%in females(P<0.05).The prevalence of obesity in the Q2 group was the lowest at 9.1%in the general population(P<0.05),and that in the Q1 group was the lowest at 8.2%in females(P<0.05).There was no statistically significant difference in the prevalence of obesity among the four groups in males,and no difference in the overweight rate among the general population,males and females was found(all P>0.05).(4)Partial correlation analysis showed that there was no correlation between BMI,waist circumference and RHR in middle-aged and elderly people(P>0.05).(5)The results of binary logistic regression analysis showed that the Q1 group as control group,after adjusting for a variety of confounding factors,Q3 and Q4 group were positively associated with the risk of obesity in females(OR=1.231,1.330,all P<0.05).There was no correlation between RHR groups and the risk of overweight among the general population,males and females(all P>0.05).Conclusion Among the middle-aged and elderly people,there is no correlation between RHR and the risk of overweight.There is a positive correlation between RHR and the risk of obesity among the middle-aged and elderly females;Obesity increases RHR,and it is advocated to carry out heart rate monitoring when screening people for obesity.