右利手者腕伸肌力量的交叉训练不受非优势手训练的影响。
Cross-education of wrist extensor strength is not influenced by non-dominant training in right-handers.
作者信息
Coombs Timothy A, Frazer Ashlyn K, Horvath Deanna M, Pearce Alan J, Howatson Glyn, Kidgell Dawson J
机构信息
Centre for Physical Activity and Nutrition Research, Deakin University, Melbourne, Australia.
Institute for Sport, Exercise and Active Living, School of Sport and Exercise Science, Victoria University, Melbourne, Australia.
出版信息
Eur J Appl Physiol. 2016 Sep;116(9):1757-69. doi: 10.1007/s00421-016-3436-5. Epub 2016 Jul 16.
PURPOSE
Cross-education of strength has been proposed to be greater when completed by the dominant limb in right handed humans. We investigated whether the direction of cross-education of strength and corticospinal plasticity are different following right or left limb strength training in right-handed participants.
METHODS
Changes in strength, muscle thickness and indices of corticospinal plasticity were analyzed in 23 adults who were exposed to 3-weeks of either right-hand strength training (RHT) or left-hand strength training (LHT).
RESULTS
Maximum voluntary wrist extensor strength in both the trained and untrained limb increased, irrespective of which limb was trained, with TMS revealing reduced corticospinal inhibition.
CONCLUSIONS
Cross-education of strength was not limited by which limb was trained and reduced corticospinal inhibition was not just confined to the trained limb. Critically, from a behavioral perspective, the magnitude of cross-education was not limited by which limb was trained.
目的
有研究提出，在右利手人群中，由优势肢体完成力量的交叉训练时，效果会更佳。我们调查了右利手参与者进行右侧或左侧肢体力量训练后，力量交叉训练的方向和皮质脊髓可塑性是否存在差异。
方法
对23名成年人进行了分析，这些成年人接受了为期3周的右手力量训练（RHT）或左手力量训练（LHT），分析了力量、肌肉厚度和皮质脊髓可塑性指标的变化。
结果
无论训练的是哪一侧肢体，训练侧和未训练侧的最大自主腕伸肌力量均增加，经颅磁刺激显示皮质脊髓抑制作用减弱。
结论
力量的交叉训练不受训练肢体的限制，皮质脊髓抑制作用的减弱也不仅局限于训练侧肢体。关键的是，从行为学角度来看，交叉训练的程度不受训练肢体的限制。
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