The Effects of One Course of Perseverant Exercise on Functional and Structural Indices of the Heart in Pediatrics

Objective: Endurance training exercises improve function state of cardiac in long-term. The aim of this study was evaluation of cardiac indices include stroke volume (SV), cardiac output (CO), left ventricular ejection fraction (LVEF) in strength exercise. Materials and Methods: Twenty boys with fourth and fifth grader after the manager’s allowance and parent’s consent was selected (10 patients as the case and 10 as the control groups), with average age, height and weight of 10.8 ± 6 years, 149 cm and 36 ± 8 kg, respectively. Perseverant exercises, structural (Left ventricle end-diastolic diameter [LVEDd], left ventricular posterior wall end diastole [LVPWd], left ventricular end-diastolic volume [LVEDV], left ventricular mass [LV mass]) and functional include LVEF, left ventricular cardiac output (LVCO), left ventricular stroke volume (LVSV) parameters. Height, weight, age, exercise intensity, healthy status, history of sports and body composition were recorded. Results: Results indicated there was no significant difference between the case and control groups who had increased their SV index by 5.3% and 1.37%, respectively. The CO index was increase by 7.29 in case and a decrease by 6.9 in the control groups (P > 0.05). LVEF has no significant difference between groups. LVPWd showed an increase by 2.14 and 2.17 in the case and control groups, respectively (P > 0.05). Neither LVEDd nor LV mass did not show any significant difference in the control group, with a decrease by 2.26 and 0.31, respectively. Meanwhile the case group demonstrated a significant difference in the latter indices, with an increase by 6.78 (P < 0.023) and 12.64 (P < 0.003), respectively. Conclusion: A course of perseverant exercises in children can effect on LVEDV, LV mass and LVEDd, but no change on LVEDV.