Department of Physiology and Biochemistry, University School of Physical Education, Wroclaw, Poland.
J Strength Cond Res. 2022 Feb 1;36(2):558-564. doi: 10.1519/JSC.0000000000003549.
Hebisz, RG, Hebisz, P, and Zatoń, MW. Heart rate variability after sprint interval training in cyclists and implications for assessing physical fatigue. J Strength Cond Res 36(2): 558-564, 2022-This study evaluated the time- and frequency-domain indexes of heart rate variability (HRV) during sprint interval exercise test (SIXT) and identify the onset of fatigue by HRV concurrent with changes in average (Pavg) and peak (Ppeak) power output, total oxygen uptake (V̇o2tou), and blood hydrogen (H+) and lactate (La-) concentrations. Twenty-seven cyclists performed 4 sets of SIXT in which each set consisted of four 30-second maximal sprints interspersed with 90 seconds of low-intensity cycling. Each set was separated by 25-40 minutes of recovery. Before beginning each set, HRV was analyzed by time (mean normal-to-normal RR intervals [RRNN], SD of normal-to-normal RR intervals [SDNN], and square root of the mean squared difference between successive normal-to-normal RR intervals [RMSSD]) and frequency (total spectral power [T] and very low- [VLF], low- [LF], and high-frequency [HF] spectral power) domain methods. Pavg, Ppeak, and V̇o2tou were recorded in each set, and H+ and La- were measured after each set. RRNN, SDNN, and VLF decreased in the second set, whereas all time and frequency indexes of HRV decreased in the third and fourth set. Pavg and H+ decreased, while V̇o2tou increased in the fourth set. Ppeak decreased in the second, third, and fourth set. Correlations were found between the changes in the time and frequency indexes of HRV with H+, La-, and V̇o2tou. The results indicate that HRV does not reflect the onset of physical fatigue in SIXT as was observed in Pavg and no correlation was found between the changes in HRV with Pavg and Ppeak.
赫比什、RG、赫比什、P 和扎通、MW。冲刺间歇训练后自行车运动员的心率变异性及其对身体疲劳评估的影响。J 力量与体能研究 36(2):558-564,2022-本研究评估了在冲刺间歇运动测试(SIXT)期间心率变异性(HRV)的时域和频域指标，并通过 HRV 与平均功率输出(Pavg)和峰值功率输出(Ppeak)、总摄氧量(V̇o2tou)以及血液氢(H+)和乳酸(La-)浓度的变化同时发生的疲劳开始来确定。27 名自行车运动员进行了 4 组 SIXT，每组由 4 个 30 秒的最大冲刺组成，中间穿插 90 秒的低强度骑行。每组之间间隔 25-40 分钟恢复。在开始每组之前，通过时间(平均正常到正常 RR 间隔[RRNN]、正常到正常 RR 间隔的标准差[SDNN]和连续正常到正常 RR 间隔的均方根差[RMSSD])和频率(总频谱功率[T]和非常低[VLF]、低[LF]和高[HF]频谱功率)域方法分析 HRV。在每组中记录 Pavg、Ppeak 和 V̇o2tou，并在每组后测量 H+和 La-。RRNN、SDNN 和 VLF 在第二组中下降，而 HRV 的所有时间和频率指标在第三和第四组中下降。Pavg 和 H+下降，而 V̇o2tou 在第四组中增加。Ppeak 在第二、第三和第四组中下降。在 HRV 的时变和频变指标与 H+、La-和 V̇o2tou 之间发现了相关性。结果表明，HRV 并没有像 Pavg 那样反映 SIXT 中身体疲劳的开始，并且在 HRV 变化与 Pavg 和 Ppeak 之间没有发现相关性。
