Bond Institute of Health and Sport, Faculty of Health Sciences and Medicine, Bond University, Gold Coast, Australia.
School of Health Sciences, University of Tasmania, Newnham, Australia.
High Alt Med Biol. 2020 Dec;21(4):370-377. doi: 10.1089/ham.2020.0066. Epub 2020 Aug 19.
This study aimed to determine if eight sessions of supramaximal but steady-state, set duration interval training in hypoxia enhanced measured anaerobic capacity and work performed during high intensity exercise. 21:370-377, 2020. Eighteen cyclists (O: 57 ± 7 ml·kg·min) were pair-matched for anaerobic capacity determined by maximal accumulated oxygen deficit (MAOD) and allocated to a 4-week interval training in hypoxia (IHT; FiO = 14.7% ± 0.5%, = 9) or interval training in normoxia (NORM; FiO = 20.6% ± 0.3%, = 9). Cyclists completed twice weekly interval training (8 × 1 minutes: ∼120% O, 5 minutes recovery: ∼50% O) in addition to their habitual training. Before and after the intervention, a constant work rate supramaximal time to fatigue and a graded exercise test were used to determine changes in anaerobic capacity/supramaximal work performed and aerobic capacity/peak aerobic power output, respectively. No interaction or main effects were observed. Using indirect calorimetry, anaerobic capacity was not significantly different in either group pre- to postintervention using MAOD (IHT: 4% ± 15%; NORM: -5% ± 12%) or gross efficiency methods (IHT: 7% ± 14%; NORM: -2% ± 9%), and VO was unchanged (IHT: 1% ± 6%; NORM: 1% ± 4%). However, within-group analysis shows that supramaximal work performed improved with IHT (14% ± 13%; = 0.02; = 0.42) but not NORM (1% ± 22%), and peak aerobic power output increased with IHT (5% ± 7%; = 0.04; = 0.32) but not NORM (2% ± 4%). Steady-state, set duration supramaximal interval training in hypoxia appears to provide a small beneficial effect on work capacity during supramaximal and high intensity exercise.
本研究旨在确定在低氧环境下进行 8 次超最大但稳态、设定持续时间的间歇训练是否能提高高强度运动中的测量无氧能力和做功。21:370-377, 2020. 18 名自行车运动员（O: 57 ± 7 ml·kg·min）根据最大累积氧亏（MAOD）进行无氧能力配对，并分为低氧间歇训练组（IHT；FiO = 14.7% ± 0.5%，n = 9）或常氧间歇训练组（NORM；FiO = 20.6% ± 0.3%，n = 9）。自行车运动员除了进行常规训练外，每周还进行两次间歇训练（8 × 1 分钟：120% O，5 分钟恢复期：50% O）。干预前后，使用恒功率至疲劳最大时间和递增运动试验分别确定无氧能力/最大做功和有氧能力/峰值有氧功率输出的变化。未观察到交互或主要影响。使用间接测热法，无论在 IHT 组（4% ± 15%）还是 NORM 组（-5% ± 12%），使用 MAOD 或总效率方法（IHT：7% ± 14%；NORM：-2% ± 9%），无氧能力在干预前后均无显著差异，VO 也无变化（IHT：1% ± 6%；NORM：1% ± 4%）。然而，组内分析显示，IHT 组的最大做功提高（14% ± 13%； = 0.02； = 0.42），而 NORM 组则没有（1% ± 22%），IHT 组的峰值有氧功率输出提高（5% ± 7%； = 0.04； = 0.32），而 NORM 组则没有（2% ± 4%）。在低氧环境下进行稳态、设定持续时间的超最大间歇训练似乎对超最大和高强度运动中的工作能力有较小的有益影响。
