O'Connor Dominic, Malone John K
O'Brien Centre for Science, University College Dublin, D04 V1W8 Dublin, Ireland.
School of Social and Health Sciences, Abertay University, DD1 1HG Dundee, Scotland, UK.
Sports (Basel). 2019 Apr 10;7(4):85. doi: 10.3390/sports7040085.
Low vs. high volume sprint-interval training (SIT) sessions have shown similar physiological benefits after 8 weeks. However, the dose response and residual effects of shorter SIT bouts (<10 s) are unknown. Following a 6-wk control period, 13 healthy inactive males were assigned to a low dose (LDG: = 7) or high dose (HDG: = 6) supervised 6-wk intervention: ×2/wk of SIT (LDG = 2 sets of 5 × 6 s ON: 18 s OFF bouts; HDG = 4-6 sets); ×1/wk resistance training (3 exercises at 3 × 10 reps). Outcome measures were tested pre and post control (baseline (BL) 1 and 2), 72 h post (0POST), and 3-wk post (3POST) intervention. At 0POST, peak oxygen uptake (VO) increased in the LDG (+16%) and HDG (+11%) vs. BL 2, with no differences between groups ( = 0.381). At 3POST, VO was different between LDG (-11%) and HDG (+3%) vs. 0POST. Positive responses for the intervention's perceived enjoyment (PE) and rate of perceived exertion (RPE) were found for both groups. Blood pressure, blood lipids, or body composition were not different between groups at any time point. Conclusion: LDG and HDG significantly improved VO at 0POST. However, findings at 3POST suggest compromised VO at 0POST in the HDG due to the delayed time course of adaptations. These findings should be considered when implementing high-dose SIT protocols for non-athletic populations.
低容量与高容量冲刺间歇训练（SIT）课程在8周后显示出相似的生理益处。然而，较短的SIT回合（<10秒）的剂量反应和残余效应尚不清楚。在为期6周的对照期后，13名健康的不活跃男性被分配到低剂量组（LDG：n = 7）或高剂量组（HDG：n = 6），接受为期6周的监督干预：每周进行2次SIT（LDG = 2组，每组5次6秒运动：18秒休息；HDG = 4 - 6组）；每周进行1次抗阻训练（3项练习，每项3组，每组10次重复）。在对照期前和对照期后（基线（BL）1和2）、干预后72小时（0POST）以及干预后3周（3POST）对结果指标进行测试。在0POST时，与BL 2相比，LDG组（+16%）和HDG组（+11%）的峰值摄氧量（VO₂）增加，两组之间无差异（P = 0.381）。在3POST时，与0POST相比，LDG组（-11%）和HDG组（+3%）的VO₂存在差异。两组对干预的感知享受（PE）和感知运动强度（RPE）均有积极反应。在任何时间点，两组之间的血压、血脂或身体成分均无差异。结论：LDG组和HDG组在0POST时显著改善了VO₂。然而，3POST时的结果表明，由于适应的时间进程延迟，HDG组在0POST时VO₂有所下降。在为非运动员人群实施高剂量SIT方案时应考虑这些发现。
