Sport and Exercise Science Research Centre (SESRC), London South Bank University, London, UK.
School of Human Sciences (Exercise and Sport Science), The University of Western Australia, Crawley, Western Australia, Australia.
J Sports Sci Med. 2021 Mar 1;20(1):45-51. doi: 10.52082/jssm.2021.45. eCollection 2021 Mar.
We compared the effects of short-term, perceptually regulated training using interval-walking in hypoxia . normoxia on health outcomes in overweight-to-obese individuals. Sixteen adults (body mass index = 33 ± 3 kg·m) completed eight interval-walk training sessions (15 × 2 min walking at a rating of perceived exertion of 14 on the 6-20 Borg scale; rest = 2 min) either in hypoxia (FiO = 13.0%) or normoxia during two weeks. Treadmill velocity did not differ between conditions or over time (p > 0.05). Heart rate was higher in hypoxia (+10 ± 3%; p = 0.04) during the first session and this was consistent within condition across the training sessions (p > 0.05). Similarly, arterial oxygen saturation was lower in hypoxia than normoxia (83 1% . 96 1%, p < 0.05), and did not vary over time (p > 0.05). After training, perceived mood state (+11.8 2.7%, p = 0.06) and exercise self-efficacy (+10.6 4.1%, p = 0.03) improved in both groups. Body mass (p = 0.55), systolic and diastolic blood pressure (p = 0.19 and 0.07, respectively) and distance covered during a 6-min walk test (p = 0.11) did not change from pre- to post-tests. Short term (2-week) perceptually regulated interval-walk training sessions with or without hypoxia had no effect on exercise-related sensations, health markers and functional performance. This mode and duration of hypoxic conditioning does not appear to modify the measured cardiometabolic risk factors or improve exercise tolerance in overweight-to-obese individuals.
我们比较了在超重和肥胖人群中，短期、感知调节的间歇步行训练在缺氧和常氧环境下对健康结果的影响。16 名成年人（体重指数 = 33 ± 3 kg·m）完成了 8 次间歇步行训练，每次训练包括 15 次 2 分钟的步行（感知运动强度为 14 分，在 6-20 分伯格量表上；休息 = 2 分钟），在两周内分别在缺氧（FiO = 13.0%）或常氧环境下进行。在两种条件下或随时间推移，跑步机速度均无差异（p > 0.05）。在第一次训练中，心率在缺氧环境下更高（+10 ± 3%；p = 0.04），并且在整个训练过程中，这种情况在条件内保持一致（p > 0.05）。同样，动脉血氧饱和度在缺氧环境下比常氧环境下更低（83 ± 1%，96 ± 1%，p < 0.05），且随时间推移无变化（p > 0.05）。训练后，两组的情绪感知状态（+11.8 ± 2.7%，p = 0.06）和运动自我效能感（+10.6 ± 4.1%，p = 0.03）均有所提高。体重（p = 0.55）、收缩压和舒张压（p = 0.19 和 0.07）以及 6 分钟步行测试的距离（p = 0.11）在预测试和后测试之间均无变化。有或没有缺氧的短期（2 周）感知调节间歇步行训练对与运动相关的感觉、健康标志物和功能表现没有影响。这种模式和持续时间的低氧调理似乎不会改变测量的心血管代谢危险因素，也不会提高超重和肥胖人群的运动耐受力。
