Department of Physical Therapy, Rehabilitation Science, and Athletic Training, University of Kansas Medical Center, Kansas City, Kansas, USA.
Department of Neurology, University of Kansas Medical Center, Kansas City, Kansas, USA.
Physiol Rep. 2024 Jul;12(14):e16142. doi: 10.14814/phy2.16142.
Autonomic nervous system (ANS) activity causes acute variations in blood pressure (BP) and heart rate (HR). These systems are challenged during high intensity interval exercise (HIIE). However, BP variability (BPV) and HR variability (HRV) response to HIIE is unknown. We characterized BPV and HRV during an acute HIIE bout using spectral low frequency [LF] and high frequency [HF] domains. We hypothesized that BPV would increase and HRV would decrease during high-intensity and active-recovery of HIIE compared to baseline [BL] and BPV would reduce and HRV would increase during cool down, post-HIIE, and 30 min post-HIIE compared to BL. HIIE involved 10 min of alternating high-intensity and active-recovery (approximately 70% and 10% of Wattmax) on a recumbent stepper. We did a secondary analysis on 23 datasets. The participants were 25 ± 1.5 years, 48% females. Our results showed high-intensity BPV LF was not significantly different from BL while HF increased. HRV LF and HF decreased compared to BL. During active-recovery, LF and HF for BPV and HRV increased greater than high-intensity. HRV LF and HF returned to BL after 30 min of recovery, whereas BPV HF was higher compared to BL. The rapid switching during HIIE uniquely modulates cardiovascular and ANS.
自主神经系统（ANS）活动会导致血压（BP）和心率（HR）的急性变化。这些系统在高强度间歇运动（HIIE）中受到挑战。然而，高强度间歇运动对血压变异性（BPV）和心率变异性（HRV）的影响尚不清楚。我们使用低频[LF]和高频[HF]频谱域来描述急性 HIIE 发作期间的 BPV 和 HRV。我们假设与 BL 相比，高强度和 HIIE 主动恢复期间的 BPV 会增加，HRV 会降低，与 BL 相比，HIIE 冷却期间、HIIE 后和 HIIE 后 30 分钟的 BPV 会降低，HRV 会增加。HIIE 在卧式踏步机上进行了 10 分钟的高强度和主动恢复交替（约 70%和 10%的 Wattmax）。我们对 23 个数据集进行了二次分析。参与者的年龄为 25 ± 1.5 岁，女性占 48%。我们的结果表明，高强度 BPV LF 与 BL 相比没有显著差异，而 HF 增加。与 BL 相比，HRV LF 和 HF 降低。在主动恢复期间，BPV 和 HRV 的 LF 和 HF 增加幅度大于高强度。30 分钟恢复期后，HRV LF 和 HF 恢复到 BL，而 BPV HF 高于 BL。HIIE 期间的快速切换会独特地调节心血管和 ANS。
