Khan Ali, Singh Jyotpal, Neary J Patrick, Mang Cameron S
Faculty of Kinesiology and Health Studies, University of Regina, 3737 Wascana Parkway, Regina, SK S4S 0A2, Canada.
Brain Sci. 2022 Mar 24;12(4):436. doi: 10.3390/brainsci12040436.
Cardiorespiratory or aerobic exercise immediately after practice of an upper-extremity motor skill task can facilitate skill consolidation, as demonstrated by enhanced performances at 24 h and 7-day retention tests. The purpose of this study was to examine the effect of acute cardiorespiratory exercise on motor skill consolidation when skill practice involved low and high levels of contextual interference introduced through repetitive and interleaved practice schedules, respectively. Forty-eight young healthy adults were allocated to one of four groups who performed either repetitive or interleaved practice of a pinch grip motor sequence task, followed by either a period of seated rest or a bout of high-intensity interval cycling. At pre- and post-practice and 24 h and 7-day retention tests, we assessed motor skill performance and β-band (15-35 Hz) intermuscular coherence using surface electromyography (EMG) collected from the abductor pollicis brevis and first dorsal interosseous. At the 7-day retention test, off-line consolidation was enhanced in the cardiorespiratory exercise relative to the rest group, but only among individuals who performed interleaved motor skill practice ( = 0.02). Similarly, at the 7-day retention test, β-band intermuscular coherence increased to a greater extent in the exercise group than in the rest group for those who performed interleaved practice ( = 0.02). Under the present experimental conditions, cardiorespiratory exercise preferentially supported motor skill consolidation and change in intermuscular coherence when motor skill practice involved higher rather than lower levels of contextual interference.
上肢运动技能任务练习后立即进行心肺或有氧运动有助于技能巩固，这在24小时和7天的保持测试中表现出的成绩提高得到了证明。本研究的目的是检验急性心肺运动对运动技能巩固的影响，此时技能练习分别通过重复和交错练习计划引入低水平和高水平的情境干扰。48名年轻健康成年人被分配到四组中的一组，他们进行捏握运动序列任务的重复或交错练习，随后进行一段时间的坐姿休息或一轮高强度间歇骑行。在练习前、练习后以及24小时和7天的保持测试中，我们使用从拇短展肌和第一骨间背侧肌采集的表面肌电图（EMG）评估运动技能表现和β波段（15 - 35赫兹）肌间连贯性。在7天的保持测试中，与休息组相比，心肺运动组的离线巩固得到增强，但仅在进行交错运动技能练习的个体中（ = 0.02）。同样，在7天的保持测试中，对于进行交错练习的人，运动组的β波段肌间连贯性增加幅度大于休息组（ = 0.02）。在当前实验条件下，当运动技能练习涉及较高而非较低水平的情境干扰时，心肺运动优先支持运动技能巩固和肌间连贯性变化。
