Postexercise heart rate recovery accelerates in strength-trained athletes
Postexercise heart rate recovery accelerates in strength-trained athletes
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DOI：
10.1249/01.mss.0000241647.13220.4c
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发表时间：
2007-02-01
期刊：
影响因子：
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通讯作者：
Miyauchi, Takashi
中科院分区：
文献类型：
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作者：
Otsuki, Takeshi;Maeda, Seiji;Miyauchi, Takashi
左心室在形态上适应耐力运动训练（偏心心脏重构）和力量运动训练（同心重构）。此外，运动后迷走神经介导的心率（HR）恢复的加速是耐力训练的人心脏的功能适应之一。然而，力量训练对人力资源恢复的影响尚不清楚。目的：本研究的目的是探讨力量训练运动员运动后心率恢复是否加速。方法：研究对象为年轻力量训练运动员（ST, N = 12）、耐力训练运动员（ET, N = 12）和年龄匹配的久坐对照男性（C, N = 12）。在次最大运动（骑车运动，40%最大摄氧量8 min）和运动后30 s（运动后）测量心率和摄氧量。结果：两类运动员左心室舒张末期尺寸均高于C组，但ET组大于ST组（C组4.3 +/- 0.1 cm； ET组5.0 +/- 0.1 cm； ST组4.8 +/- 0.1 cm）。ST组左室平均壁厚大于ET组，但两组均高于C组（C组0.85 +/- 0.02 cm； ET组0.90 +/- 0.02 cm； ST组1.00 +/- 0.02 cm）。运动后心率衰减时间常数（迷走神经介导的运动后心率恢复指标）在ST组和ET组均低于C组（C组94.4 +/- 9.2 s； ET组65.9 +/- 4.3 s； ST组69.1 +/- 4.0 s）。ST和ET的氧脉冲大于C （C, 9.4 +/- 0.6 mL /拍；ET, 13.0 +/- 0.9 mL /拍；ST, 12.8 +/- 0.4 mL /拍），这导致两类运动员的氧负债增加（C, 0.257 +/- 0.024 L； ET, 0.343 +/- 0.030 L； ST, 0.331 +/- 0.017 L）。我们没有发现这些指标在ST和ET之间有显著差异。结论：这些结果表明，在力量训练和耐力训练的运动员中，运动后立即的HR恢复都加快了。
The left ventricle morphologically adapts to endurance exercise training (eccentric cardiac remodeling) and strength exercise training (concentric remodeling). In addition, the acceleration of vagally mediated heart rate (HR) recovery after exercise is one of the functional adaptations of the heart in endurance-trained humans. However, the effect of strength training on HR recovery is unclear. Purpose: The purpose of this study was to investigate whether postexercise HR recovery accelerates in strength-trained athletes. Methods: Subjects were young strength-trained athletes (ST; N = 12), endurance-trained athletes (ET; N = 12), and age-matched sedentary control men (C; N = 12). HR and oxygen uptake were measured during submaximal exercise (cycling exercise, 40% maximal oxygen uptake for 8 min) and 30 s after the exercise (the postexercise period). Results: Left ventricular end-diastolic dimension was higher in both types of athletes compared with C, but greater in ET than in ST (C, 4.3 +/- 0.1 cm; ET, 5.0 +/- 0.1 cm; ST, 4.8 +/- 0.1 cm). Left ventricular average wall thickness was greater in ST in comparison with ET, although it was higher in both trained men compared with C (C, 0.85 +/- 0.02 cm; ET, 0.90 +/- 0.02 cm; ST, 1.00 +/- 0.02 cm). The time constant of postexercise HR decay, an index of vagally mediated postexercise HR recovery, was lower in ST and ET compared with C (C, 94.4 +/- 9.2 s; ET, 65.9 +/- 4.3 s; ST, 69.1 +/- 4.0 s). Oxygen pulse was greater in ST and ET than in C (C, 9.4 +/- 0.6 mL per beat; ET, 13.0 +/- 0.9 mL per beat; ST, 12.8 +/- 0.4 mL per beat), and it results in increased oxygen debt for both types of athletes (C, 0.257 +/- 0.024 L; ET, 0.343 +/- 0.030 L; ST, 0.331 +/- 0.017 L). We did not find significant differences in these indices between ST and ET. Conclusions: These results suggest that the HR recovery immediately after exercise is accelerated in both strength- and endurance-trained athletes.