<strong>THE EFFECT OF AEROBIC CONTINUOUS AND INTERVAL TRAINING</strong><strong> ON THE LEFT VENTRICULAR STRUCTURE AND FUNCTION</strong><strong> OF MALE NON-ATHLETES </strong>

Abstract

Exercise plays an important role to improve cardiovascular performance. The aim of this study was to compare the effect of aerobic continuous and interval training on the left ventricular structure and function. Twenty untrained healthy male students (aged 18-22 years) were randomly divided into two groups: continuous (C; n = 10) and interval (I; n = 10). The training programme consisted of countryside jogging for 45 min during 8 weeks three times a week at 70% of maximum heart rate (MHR). In each session group C was jogging for 45 min and in group I jogging was performed in 5 nine-minute stages with a four-minute inactive rest between them. M-mode, 2-dimensional, colour and Doppler transthoracic echocardiography were performed, during resting conditions, before and after the training period. After 8-week training the end diastolic diameter, systolic blood pressure and diastolic blood pressure in groups C and I, and the posterior wall thickness and the end systolic diameter in group I showed no significant difference (P > 0.05). On the other hand, the percentage of ejection fraction and shortening fraction in groups C and I, the end systolic diameter and the posterior wall thickness in group C and the interventricular septum thickness in group I demonstrated a significant difference (P ≤ 0.05). Comparing the two groups, only the value of the interventricular septum thickness was significant (P ≤ 0.05). In general, eight-week aerobic continuous and interval training can affect left ventricular structure and function.

Effects of Modest Hypoxia and Exercise on Cardiac Function, Sleep-Activity, Negative Geotaxis Behavior of Aged Female Drosophila

“…Although at present there is no way to stop the biological aging process of organisms, previous studies (Leiser et al, 2013;Garatachea et al, 2015) have confirmed that mild hypoxic exposure and modest exercise training can delay functional decline. Just as Mahdiabadi et al (2013) observed a significant increase in fractional shortening and end-systolic diameter with exercise. Similarly, our study also showed a statistical increase in fractional shortening in exercise training flies compared to the controls (Figure 1D), which is due to a significant increase in diastolic diameter (Figure 1B), thereby indicating that exercise induces a greater cardiac filling volume during diastole, and the resultant higher preload resulted in more cardiac output per beat, thereby enhancing the cardiac function of senile Drosophila (Figures 1B-D).…”

Echokardiograficzna ocena układu krążenia młodzieży uprawiającej sport wyczynowy w aspekcie rozwoju mechanizmów adaptacyjnych do wysiłku fizycznego

“…Single reports can be found in literature concerning heart remodeling under physical training in the same age group as here presented. These reports show contradictory results but the uniform general conclusion is that physical training almost always results in left ventricle remodeling in adolescents, although to a different extent [18][19][20][21][22].…”

Transthoracic Echocardiography and Dependence of Electrocardiographic Indicators on Physical Activity Type in Lithuanian Athletes

“…Pluim, Zwinderman, Van der Laarse, Van der Around and Wall (2000) studied the hearts of 1451 athletes and concluded that the absolute average thickness of the posterior wall of the left ventricle and the interventricular septum in the control group was significantly lower than that in the strength, endurance, or concurrent training groups. Also, Mahdiabadi, Gaeini, Kazemi and Mahdiabadi (2013) found that the thickness of the left ventricle, the interventricular septum and the posterior wall was the greatest in the strength group. According to the latest recommendations (2015), American Society for Echocardiography and the European Cardiovascular Association (Lang et al, 2015) provided standards based on body surface area.…”