| Objective:To observe the effect of different exercise durations of YiJinJing on cardiac structure,left ventricular pump function and left ventricular systolic function of the healthy elderly.Methods:Fifty-eight healthy volunteers aged from 60 to 70 were divided into two groups:group A,30 cases,10 min 12-movements-YiJinJing exercise;group B,28 cases,20 min 12-movements-YiJinJing exercise.Cardiac functions,including indexes of end systolic dimension (ESD),end diastolic dimension (EDD),end diastolic volume (EDV),stroke volume (SV),cardiac output (CO),cardiac output index (CI),fractional shortening (FS) and ejection fraction (EF),were measured by using heart ultrasound before and after exercises.Results:At 12th week after exercises,the indexes of ESD,EDV,EDD,SV,CI,EF and FS in both groups were increased,but ESD was decreased.The scores of SV,CI,EF in group B showed significantly differences(P<0.05).There was no significant difference in each index between two groups after exercises.Conclusion:There are certain trends on cardiac morphology and structure in two exercise groups.Exercise of 20 min duration can improve the left ventricular pump function,but there is no significant difference in contraction function.From the consideration of improving cardiac function,exercise of 20-min duration is recommendable. |
