Zhang Yahui, Qi Lin, van de Vosse Frans, Du Chenglin, Yao Yudong, Du Jianhang, Wu Guifu, Xu Lisheng
College of Medicine and Biomedical Information Engineering, Northeastern University, Shenyang, China.
Department of Cardiology, The Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen, China.
Front Physiol. 2020 Nov 12;11:593277. doi: 10.3389/fphys.2020.593277. eCollection 2020.
It is commonly believed that central hemodynamics is closely associated with the presence of cardiovascular events. However, controversial data exist on the acute response of competitive sports on central hemodynamics. Moreover, the central hemodynamic response to exercise is too transient to be investigated. Therefore, this study aimed to investigate the central hemodynamic response in young basketball athletes and controls after 1 h recovery after exercise.
Fifteen young basketball athletes and fifteen aged-matched controls were recruited to perform the Bruce test. Central hemodynamics were measured and calculated, including heart rate (HR), aortic systolic, diastolic, and pulse pressure (ASP, ADP, and APP), ejection duration (ED), sub-endocardial viability ratio (SEVR), central augmentation index (AIx), and AIx@HR75. Intra-group and inter-group differences were analyzed by two-way repeated measures ANOVA.
ASP significantly decreased at 10 min after exercise in athletes, while it markedly declined at 15 min after exercise in controls ( < 0.01). Additionally, only in the athlete group, ADP significantly decreased at 50 min and at 1 h after exercise. AIx was also significantly reduced at 1-2, 20, 30, and 40 min after exercise (all < 0.05). Moreover, there were significant differences in the changes of these parameters between the two groups at these measurement points ( < 0.05). SEVR significantly recovered to the baseline level after 30 min, while ED and HR returned to baseline levels at 40 min after exercise in both groups.
Sustained decrease of aortic BPs was sooner after the cessation of exercise in athletes than in controls, and changes of aortic stiffness were more evident in athletes than those in controls during the 1 h recovery period. Additionally, SEVR returned to the baseline sooner than ED and HR in athletes.
人们普遍认为，中心血流动力学与心血管事件的发生密切相关。然而，关于竞技运动对中心血流动力学的急性反应，存在有争议的数据。此外，运动对中心血流动力学的反应过于短暂，难以进行研究。因此，本研究旨在调查年轻篮球运动员和对照组在运动后1小时恢复后的中心血流动力学反应。
招募15名年轻篮球运动员和15名年龄匹配的对照组进行布鲁斯试验。测量并计算中心血流动力学参数，包括心率（HR）、主动脉收缩压、舒张压和脉压（ASP、ADP和APP）、射血持续时间（ED）、心内膜下活力比（SEVR）、中心增强指数（AIx）和心率为75次/分时的中心增强指数（AIx@HR75）。采用双向重复测量方差分析对组内和组间差异进行分析。
运动员运动后10分钟时ASP显著下降，而对照组在运动后15分钟时ASP显著下降（P<0.01）。此外，仅在运动员组中，运动后50分钟和1小时时ADP显著下降。运动后1 - 2分钟、20分钟、30分钟和40分钟时AIx也显著降低（均P<0.05）。此外，在这些测量点两组之间这些参数的变化存在显著差异（P<0.05）。运动后30分钟时SEVR显著恢复到基线水平，而两组运动后40分钟时ED和HR均恢复到基线水平。
运动员运动停止后主动脉血压持续下降的时间比对照组更早，并且在1小时恢复期内运动员主动脉僵硬度的变化比对照组更明显。此外，运动员中SEVR比ED和HR更早恢复到基线水平。
