Coetsee Carla, Terblanche Elmarie
Department of Sport Science, Faculty of Education, Stellenbosch University, Private Bag X1, Matieland, 7601, South Africa.
Eur J Appl Physiol. 2017 Aug;117(8):1617-1627. doi: 10.1007/s00421-017-3651-8. Epub 2017 May 31.
To determine if a cerebral oxygenation response during cortical activation is influenced by exercise training mode.
Sixty-seven individuals (55-75 years old) volunteered for this 16-week intervention study. Participants were randomized into a resistance training (RT) group (n = 22), high-intensity interval training (HIIT) group (n = 13), moderate continuous training (MCT) group (n = 13) and a control (CON) group (n = 19). Near-infrared spectroscopy was used to measure cerebral oxygenation during the Stroop task. A submaximal Bruce treadmill test was used to measure changes in walking endurance.
The GROUP × TIME interaction for reaction time on the naming and executive Stroop conditions were not significant (P > 0.05). At post-test, the CON group showed increased brain activation, with significantly higher relative oxy-haemoglobin (OHb) values during the naming Stroop condition compared to pre-test (P = 0.03), while their increased relative OHb on the complex condition showed a distinct trend toward significance (P = 0.09). MCT and HIIT participants exhibited decreased brain activation during the Stroop task, with MCT showing a significant increase in relative deoxy-haemoglobin (HHb) compared to pre-test during the naming and executive Stroop conditions (P < 0.05). The HIIT group improved significantly in walking endurance (P = 0.04).
Sixteen weeks of exercise training resulted in more efficient cerebral oxygenation during cortical activation compared to a no-exercise control group. Furthermore, HIIT and MCT were superior to RT for task-efficient cerebral oxygenation and improved oxygen utilization during cortical activation in older individuals.
确定皮质激活期间的脑氧合反应是否受运动训练模式的影响。
67名年龄在55至75岁之间的个体自愿参加了这项为期16周的干预研究。参与者被随机分为阻力训练（RT）组（n = 22）、高强度间歇训练（HIIT）组（n = 13）、中等强度持续训练（MCT）组（n = 13）和对照组（CON）（n = 19）。在执行Stroop任务期间，使用近红外光谱法测量脑氧合。采用次极量Bruce跑步机测试来测量步行耐力的变化。
在命名和执行Stroop任务条件下，反应时间的组×时间交互作用不显著（P>0.05）。在测试后，CON组显示脑激活增加，与测试前相比，在命名Stroop任务条件下相对氧合血红蛋白（OHb）值显著更高（P = 0.（此处原文有误，按照语境推测应为0.03）），而在复杂条件下其相对OHb的增加显示出明显的显著趋势（P = 0.09）。MCT组和HIIT组参与者在Stroop任务期间表现出脑激活减少，与测试前相比，MCT组在命名和执行Stroop任务条件下相对脱氧血红蛋白（HHb）显著增加（P<0.05）。HIIT组的步行耐力有显著改善（P = 0.04）。
与无运动对照组相比，16周的运动训练导致皮质激活期间脑氧合更有效。此外，在老年人中，HIIT和MCT在任务高效脑氧合以及改善皮质激活期间的氧利用方面优于RT。
