Absence of training-specific cardiac adaptation in paraplegic athletes
Absence of training-specific cardiac adaptation in paraplegic athletes
复制标题
DOI：
10.1097/00005768-200211000-00002
复制
发表时间：
2002-11-01
期刊：
影响因子：
--
通讯作者：
George, KP
中科院分区：
文献类型：
--
作者：
Gates, PE;Campbell, IG;George, KP
目的：在身体健全的耐力和力量训练的运动员中报道的左心室（LV）适应的独特性质可能反映了急性运动期间发生的不同血流动力学负荷模式。脊髓损伤运动员的运动诱导血流动力学负荷与健康运动员不同（静脉回流和每搏输出量较低，心率较高）。我们试图检验这一假设，即与久坐的脊髓损伤受试者相比，耐力和力量训练的脊髓损伤运动员的壁厚，而不是腔室尺寸，会更大。研究方法：我们进行了休息二维，运动模式，多普勒检查的11个功率训练，10个耐力训练，和5个久坐不动的脊髓损伤志愿者和比较结构和功能的LV数据，使用方差分析。在按体重（BM）（0.33）缩放后，还分析了LV结构数据。结果：各组之间的任何LV结构或功能测量值均无统计学显著差异。然而，与久坐者相比，运动员的平均室壁厚度（0.95 +/-0.12 vs 0.83 +/-0.10 cm）和左心室质量（193 +/-57 vs 164 +/-66 g）有较大的趋势。结论：耐力和力量训练似乎不可能使脊髓损伤运动员的左室扩大具有独特的模式。脊髓损伤的运动员在运动训练中可能会出现左心室的小适应。在这个人群中的研究是复杂的，在重要的身体，生理和运动相关的变量的极端异质性。
Purpose: The distinctive nature of left ventricular (LV) adaptation reported in able-bodied endurance- and power-trained athletes probably reflects the different hemodynamic loading patterns that occur during acute exercise. The exercise-induced hemodynamic loads in spinal cord injured athletes are different to those in able-bodied counterparts (lower venous return and stroke volume, higher heart rate). We sought to test the hypothesis that wall thickness, but not chamber dimension, would be larger in endurance- and power-trained spinal cord injured athletes compared with sedentary spinal cord injured subjects. Methods: We undertook resting two-dimensional, motion-mode, and Doppler examinations of 11 power-trained, 10 endurance-trained, and 5 sedentary spinal cord injured volunteers and compared structural and functional LV data by using ANOVA. LV structural data were also analyzed after being scaled to body mass (BM)(0.33). Results: There were no statistically significant differences among groups for any of the LV structural or functional measurements. However, there was a trend for larger mean wall thickness (0.95 +/- 0.12 vs 0.83 +/- 0.10 cm) and left ventricular mass (193 +/- 57 vs 164 +/- 66 g) in athletes compared with sedentary individuals. Conclusion: It seems unlikely that endurance and power training elicits distinctive patterns of LV enlargement in spinal cord injured athletes. Small adaptations of the left ventricle may occur with athletic training in the spinal cord injured athlete. Research within this population is complicated by extreme heterogeneity in important physical, physiological, and athletic-related variables.