Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, Melbourne, Australia.
Department of Physiotherapy, Faculty of Medicine, Nursing and Health Sciences, School of Primary and Allied Health Care, Monash University, Melbourne, Australia.
Eur J Appl Physiol. 2017 Dec;117(12):2479-2492. doi: 10.1007/s00421-017-3736-4. Epub 2017 Oct 10.
The corticospinal responses to skill training may be different to strength training, depending on how the strength training is performed. It was hypothesised that the corticospinal responses would not be different following skill training and metronome-paced strength training (MPST), but would differ when compared with self-paced strength training (SPST).
Corticospinal excitability, short-interval intra-cortical inhibition (SICI) and strength and tracking error were measured at baseline and 2 and 4 weeks. Participants (n = 44) were randomly allocated to visuomotor tracking, MPST, SPST or a control group.
MPST increased strength by 7 and 18%, whilst SPST increased strength by 12 and 26% following 2 and 4 weeks of strength training. There were no changes in strength following skill training. Skill training reduced tracking error by 47 and 58% at 2 and 4 weeks. There were no changes in tracking error following SPST; however, tracking error reduced by 24% following 4 weeks of MPST. Corticospinal excitability increased by 40% following MPST and by 29% following skill training. There was no change in corticospinal excitability following 4 weeks of SPST. Importantly, the magnitude of change between skill training and MPST was not different. SICI decreased by 41 and 61% following 2 and 4 weeks of MPST, whilst SICI decreased by 41 and 33% following 2 and 4 weeks of skill training. Again, SPST had no effect on SICI at 2 and 4 weeks. There was no difference in the magnitude of SICI reduction between skill training and MPST.
This study adds new knowledge regarding the corticospinal responses to skill and MPST, showing they are similar but different when compared with SPST.
取决于力量训练的执行方式，技能训练和力量训练对皮质脊髓反应的影响可能不同。研究假设，在进行技能训练和节拍器-paced 力量训练（MPST）后，皮质脊髓反应不会有所不同，但与自我-paced 力量训练（SPST）相比，皮质脊髓反应会有所不同。
在基线以及 2 周和 4 周时，测量皮质脊髓兴奋性、短潜伏期皮质内抑制（SICI）以及力量和跟踪误差。参与者（n=44）被随机分配到视觉运动跟踪、MPST、SPST 或对照组。
MPST 在 2 周和 4 周后分别使力量增加了 7%和 18%，而 SPST 在 2 周和 4 周后使力量分别增加了 12%和 26%。技能训练后力量没有变化。技能训练在 2 周和 4 周时使跟踪误差分别降低了 47%和 58%。SPST 后跟踪误差没有变化；然而，MPST 在 4 周后使跟踪误差降低了 24%。皮质脊髓兴奋性在 MPST 后增加了 40%，在技能训练后增加了 29%。SPST 在 4 周后皮质脊髓兴奋性没有变化。重要的是，技能训练和 MPST 之间的变化幅度没有差异。MPST 在 2 周和 4 周时使 SICI 分别降低了 41%和 61%，而技能训练在 2 周和 4 周时使 SICI 分别降低了 41%和 33%。同样，SPST 在 2 周和 4 周时对 SICI 没有影响。技能训练和 MPST 之间的 SICI 降低幅度没有差异。
这项研究增加了关于技能和 MPST 对皮质脊髓反应的新知识，表明它们与 SPST 相似但不同。
