تاثير تمرينات استقامتي، قدرتي، و موازي بر عملكرد قلب دختران دانشگاهي

The Effect of Endurance, Resistance and Concurrent Training on the Heart Function of Female Students

The aim of this study was to compare the effect of endurance, resistance and concurrent training on the heart function. Thirty nine untrained female students (aged: 24±2.58 yr, height: 161±8.2 cm, weight: 56.8± 14.61 kg) were randomly divided into four groups; Control (C; n=9), Endurance (E; n=10), Strength (S; n=10) and concurrent (SE; n=10). E training consisted of running %65 MHR for 16 minutes during the first week, reaching %80 MHR for 30 minutes during the 8th week. S training consisted of having four leg-press, bench-press, pull down curls, and legs curls. During the first week, the training was done at %50 1RM in two sets with 10 repetitions. The intensity of training was increased to %80 1RM in 3 sets and 6 repetitions, during the 8th week. The SE training included a combination of two S and E training in the same manner of each respective group. Pre and post of training heart rate, QT and PR intervals, the distance of ST segment from isoelectric line,deceleration time, ejection fraction percent measured by echocardiography and electrocardiography. Systolic and diastolic blood pressure and vo2 max (through Bruce protocol and treadmill) also gauged. According to the finding of inter group comparison, decrease of heart rate, systolic blood pressure and increase of PR interval, vo2max, decrease of diastolic blood pressure of endurance group was meaningful which in between group comparison in four parameters of first, differences were meaningful. (p<0.05). In resistance group, the parameters of heart rate and systolic blood pressure showed meaningful increases which in between group comparison differences were meaningful (p<0.05). And in concurrent group parameter of V02max showed meaningful increase which in between group this difference was also meaningful (p<0.05). In conclusion it is suggest that performing of endurance trainings after resistance trainings creation combine of cardiac adaptation with due of endurance or resistance training alone and causes to eliminate some side effects of resistance training on heart.