Belarusian State University of Physical Culture, Minsk, Belarus.
Faculty of Sport Science, Tehran University, Tehran, Iran.
Biol Sport. 2013 Sep;30(3):207-11. doi: 10.5604/20831862.1059302. Epub 2013 Jul 22.
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.
运动在改善心血管性能方面起着重要作用。本研究旨在比较有氧连续训练和间歇训练对左心室结构和功能的影响。20 名未经训练的健康男性学生（年龄 18-22 岁）被随机分为两组：连续组（C 组，n=10）和间歇组（I 组，n=10）。训练方案包括在 8 周内每周 3 次，以 70%的最大心率进行 45 分钟的乡村慢跑。在每次训练中，C 组连续慢跑 45 分钟，而 I 组则以 5 个 9 分钟的阶段进行，每个阶段之间有 4 分钟的休息时间。在休息状态下、训练前后，使用 M 模式、二维、彩色和多普勒经胸超声心动图进行检查。经过 8 周的训练，C 组和 I 组的舒张末期直径、收缩压和舒张压以及 I 组的后壁厚度和收缩末期直径没有显著差异（P>0.05）。另一方面，C 组和 I 组的射血分数和缩短分数、C 组的收缩末期直径和后壁厚度以及 I 组的室间隔厚度有显著差异（P≤0.05）。比较两组，只有室间隔厚度的值有显著差异（P≤0.05）。总的来说，8 周的有氧连续和间歇训练可以影响左心室的结构和功能。
