تأثير تمرين هوازي در آب در دوره هاي مختلف زماني بر ساختار بطن چپ مردان ميانسال

The Effect of Time Course Water Aerobic Training on the Morphology of Left Ventricle in Middle-aged Men

The aim of the present research was to determine the effect of time course water aerobic training on the morphology of left ventricle in middle -aged men. Thirty members of the academic staff, with Mean (SE) age of 46.5 ± 1.7 yr, weight of 82.5 ± 1.2kg, height of 173 ± 1.5cm, who did not have any cardiovascular or particular diseases were randomly selected for the purpose of this study. Then they were divided into two experimental and control groups each group was composed of 15 members. The training program of the experimental group included upper and lower extremity exercises as well as running and walking in water with the intensity of 65­75% HR reserve (Karvonen protocol). They all were given those exercises three times in a week over three months. To investigate the effects of training on cardiac morphology, subjects were evaluated both at the beginning and ending of each month, their LEVDD, LVESD, IVST, PWT, LVM were tested via the bi-dimensional and Doppler echo-cardiography. Analysis of variance (ANOVA) with repeated measures was employed to detect any possible changes in each variable as a result of training. The benfruni post-hoc procedure was used for specific comparison, with the level of statistical significance at p<0/05. The results indicated that this type of training in short term period showed significant changes in LVEDD (p<0/05). Furthermore, the results did not reveal any significant changes in LVESD, IVST. Besides, the changes in PWT and LVM was significant in the tertiary period after three months (p<0/05). The present study has shown As regards the obtained results it could be concluded that: water aerobic training as a compound exercise with the volume overload can be a suitable choice for the middle aged men who were not able to conduct activities on land.