Regulation of strength training on autonomic nervous function in obese male adolescents

Objective The present study was to explore the regulative role of strength training on autonomic nervous function of obese male adolescents in order to provide evidence for special exercise prescription.Methods Twenty-four male simple obese adolescents were randomly divided into rest control group (n=12) and strength training group (n=12).Subjects of ST group performed 8-week strength training intervention while those of RC group maintained their normal life.Before and after experiment,heart rate,heart rate variability (HRV),blood pressure (including SBP and DBP),blood pressure variability (BPV),as well as baroreflex sensitivity (BRS) were determined.Results Before the test,all indicators of two groups had no difference (P>0.05).Mter the test,compared within-group,DBP (pre:77±5 mmHg,post:72±4 mmHg,P<0.05),BPV TP (pre:40.3±6.4 mmHg2,post:32.8±5.5 mmHg2,P<0.01) and BPV.LFn (pre:28.6±3.7 mmHg2,post:19.4±3.9 mmHg2,P<0.01) reduced while other parameters including heart rate,SBP,HRV and BRS had no significant difference in ST group;there were no significant differences of all indicators in RC group (P>0.05).Compared between-groups,DBP (ST:72±4 mmHg,RC:78±4 mmHg,P<0.01),BPV TP(ST:32.8±5.5 mmHg2,RC:42.1±5.9 mmHg2,P<0.01) and BPV LFn (ST:19.4±3.9 mmHg,RC:25.2±5.5 mmHg,P<0.01)in ST group were lower than those of RC group.Conclusion Strength training of 8 weeks improved sympathetic vasoconstrictive nerve modulation in obese male adolescents.