Laboratório de Fisiologia e Fisiopatologia Cardíaca, Divisão de Cardiologia, Universidade Federal de São Paulo, São Paulo, Brasil.
Faculdade de Educação Física, Universidade do Estado de Mato Grosso, Mato Grosso, Brasil.
Eur J Sport Sci. 2022 Jul;22(7):1113-1121. doi: 10.1080/17461391.2021.1900403. Epub 2021 Mar 29.
Despite the growing evidence for the beneficial effects of high-intensity interval exercise (HIIE) on vascular health of overweight and obese individuals, it is not clear whether the autonomic stress promoted by HIIE during the ambulatory period is higher than that by moderate-intensity continuous exercise (MICE). Therefore, this study compares the 24 hour (h) ambulatory heart rate variability (HRV) following HIIE and MICE in young overweight and obese men. Eleven untrained men aged 23.2 ± 1.9 years, with average body mass index (BMI) of 31.6 ± 3.9 kg/m² (three overweight and eight obese), underwent three exercise sessions: HIIE, MICE and Control (CT). HRV was recorded in the laboratory and for the next 24 h following laboratory recovery. There were no differences in HRV indices in the rest period between the sessions ( > .05). During the ambulatory period, the area under the curve (AUC) of the low-frequency band transformed into natural logarithm (Ln-LF) during sleep was higher after HIIE than after CT (43.31 ± 8.59 vs. 41.11 ± 7.28 ms²*h, = .034). The HRV followed by MICE did not differ from other sessions ( > .05). In conclusion, the 24 h ambulatory HRV did not differ after HIIE and MICE. However, despite the small effect, HIIE increased the cardiac autonomic modulation during the sleep period, as a protector of cardiovascular system. Highlights24 h ambulatory HRV could add important information about the cardiovascular safety of the exercise protocols in overweight and obese individuals.There was no disturbances in the cardiac autonomic modulation during the awake period, regardless of the exercise protocol.LnLF index was higher in HIIE compared to CT in the sleep period.24 h ambulatory HRV did not differ between the HIIE and MICE sessions.
尽管高强度间歇运动（HIIE）对超重和肥胖个体的血管健康有益的证据不断增加，但尚不清楚 HIIE 在活动期引起的自主神经应激是否高于中等强度持续运动（MICE）。因此，本研究比较了 HIIE 和 MICE 后年轻超重和肥胖男性 24 小时（h）活动期间的心率变异性（HRV）。11 名未经训练的男性，年龄 23.2±1.9 岁，平均体重指数（BMI）为 31.6±3.9kg/m²（超重 3 人，肥胖 8 人），进行了 3 次运动：HIIE、MICE 和对照（CT）。HRV 在实验室中记录，并在实验室恢复后的接下来 24h 内进行记录。在休息期间，各次运动之间的 HRV 指数无差异（>0.05）。在活动期间，HIIE 后睡眠期间低频带的曲线下面积（AUC）转化为自然对数（Ln-LF）高于 CT（43.31±8.59 对 41.11±7.28ms²*h，=0.034）。MICE 后的 HRV 与其他运动无差异（>0.05）。总之，HIIE 和 MICE 后 24h 活动 HRV 无差异。然而，尽管效果较小，HIIE 增加了睡眠期间心脏自主神经调节，作为心血管系统的保护者。
