Influence of aerobic exercise in heart rate variability in obese adolescents
10.13481/j.1671-587x.20140536
- VernacularTitle:有氧运动对肥胖青少年心率变异性的影响
- Author:
Guangxin LI
;
Zhanyi WANG
;
Wei LYU
;
Lijun ZHAO
- Publication Type:Journal Article
- Keywords:
aerobic exercise;
obese;
heart rate variability;
exercise prescription;
adolescents
- From:
Journal of Jilin University(Medicine Edition)
2014;(5):1093-1097
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the influence of 8-week aerobic exercise in heart rate variability (HRV)in obese adolescents and to provide the evidence for formulating special exercise prescription.Methods Forty male obese adolescents (BMI≥25 kg·m-2 )were randomly divided into exercise group (n=20)and control group (n=20). The subjects in exercise group conducted a 8-week (five times/week,50-60 min)aerobic exercise while those in control group maintained their routine lifestyle. The body composition, hemodynamic parameters including heart rate(HR)and blood pressure and HRV parameters including total power (TP),normalized low frequency (LFn), normalized high frequency (HFn)and LFn/HFn ratio were measured before and after experiment.Results There were no significant differences of the indicators of the subjects between two groups before experiment (P>0.05). At the end of experiment,compared before experiment,the fat mass(FM),the percentage of body fat(BF%), the rest HR,SBP and DBP were decreased (P<0.05 or P<0.01);the TP and HFn were increased(P<0.01);the LFn and LFn/HFn ratio were reduced (P<0.01)in exercise group after experiment;but the indexes of the subjects in control group showed no significant changes (P>0.05).Compared control group,the FM,the BF%, the rest HR,SBP,DBP,LFn and LFn/HFn ratio were decreased while the TP and HFn were increased (P<0.01)in exercise group after experiment.Conclusion Aerobic exercise may effectively reduce the sympathetic activity and increase the vagal tone in the obese adolescents.
