Inter-University Laboratory of Human Movement Biology-EA 7424, University Claude Bernard-Lyon1, University of Lyon, Villeurbanne, France.
Scand J Med Sci Sports. 2020 Dec;30(12):2477-2484. doi: 10.1111/sms.13799. Epub 2020 Sep 19.
Sleep-dependent performance enhancement has been consistently reported after explicit sequential finger learning, even using motor imagery practice (MIP), but whether similar sleep benefits occur after explicit sequential gross motor learning with the lower limbs has been addressed less often. Here, we investigated both acquisition and consolidation processes in an innovative sequential footstep task performed either physically or mentally. Forty-eight healthy young participants were tested before and after physical practice (PP) or MIP on the footstep task, following either a night of sleep (PPsleep and MIPsleep groups) or an equivalent daytime period (PPday and MIPday groups). Results showed that all groups improved motor performance following the acquisition session, albeit the magnitude of enhancement in the MIP groups remained lower relative to the PP groups. Importantly, only the MIPsleep group further improved performance after a night of sleep, while the other groups stabilized their performance after consolidation. Together, these findings demonstrate a sleep-dependent gain in performance after MIP in a sequential motor task with the lower limbs but not after PP. Overall, the present study is of particular importance in the context of motor learning and functional rehabilitation.
睡眠依赖性表现提升在明确的顺序手指学习后得到了一致的报告，即使使用运动想象练习（MIP）也是如此，但在使用下肢进行明确的顺序大运动学习后，是否会出现类似的睡眠益处，这个问题较少被关注。在这里，我们研究了在创新性的顺序脚步任务中，无论是实际执行还是在头脑中进行，在获得和巩固过程中会发生什么。48 名健康的年轻参与者在进行实际练习（PP）或 MIP 之前和之后接受了测试，分别在一夜睡眠（PPsleep 和 MIPsleep 组）或等效的白天时段（PPday 和 MIPday 组）后接受测试。结果表明，所有组在获得阶段后都提高了运动表现，尽管 MIP 组的增强幅度相对 PP 组仍然较低。重要的是，只有 MIPsleep 组在一夜睡眠后进一步提高了表现，而其他组在巩固后稳定了表现。总之，这些发现表明，在下肢的顺序运动任务中，MIP 后会出现睡眠依赖性的表现提升，但在 PP 后则不会。总的来说，本研究在运动学习和功能康复方面具有特别重要的意义。
