Exercise Biology Research Group (BioEx), Federal University of Triangulo Mineiro (UFTM), Uberaba, Minas Gerais, Brazil.
Department of Sport Sciences, Health Science Institute, Federal University of Triangulo Mineiro (UFTM), Uberaba, Minas Gerais, Brazil.
Appl Physiol Nutr Metab. 2021 Oct;46(10):1279-1289. doi: 10.1139/apnm-2021-0088. Epub 2021 May 13.
The objectives of this study were to 1) compare the extent of cross-transfer of muscle strength of high- versus low-load unilateral resistance training performed with external pacing of the movement (URTEP) and 2) compare the time course of the 2 approaches. Fifty subjects were randomized to 1 of the following 3 groups: G80 [2 sets at 80% and 2 sets at 40% of 1 repetition maximum (1RM), 1 concentric second and 3 eccentric seconds controlled by a metronome]; G40 (4 sets at 40% of 1RM, 1 s and 3 s controlled by a metronome); or control group. At week 1, the G80 increased the elbow flexion 1RM (< 0.05) in contralateral arm. At week 4, both G80 and G40 increased the elbow flexion 1RM ( < 0.05) in contralateral arm. However, a greater 1RM gain was observed in the G80 than in the G40 ( < 0.05). Thus, although higher-load URTEP seems to enhance the cross-education effect when compared with lower-load URTEP, the cross-education of dynamic strength can be achieved in the 2 approaches after 4 weeks. Many patients would benefit from cross-education of muscle strength through URPEP, even those who are unable to exercise with high loads and in short periods of immobilization. Unilateral resistance training promotes cross-education of dynamic muscle strength. However, higher-load resistance training enhances the effects of cross-education of muscle strength.
1）比较使用外部节拍器进行高负荷和低负荷单侧阻力训练（URTEP）时肌肉力量交叉转移的程度；2）比较两种方法的时间过程。50 名受试者被随机分为以下 3 组之一：G80[2 组 80%和 2 组 40%的 1 次重复最大值（1RM），由节拍器控制 1 个向心秒和 3 个离心秒]；G40（4 组 40%的 1RM，由节拍器控制 1 秒和 3 秒）；或对照组。在第 1 周，G80 组使对侧手臂的肘屈肌 1RM 增加（<0.05）。在第 4 周，G80 和 G40 组均使对侧手臂的肘屈肌 1RM 增加（<0.05）。然而，G80 组的 1RM 增益大于 G40 组（<0.05）。因此，虽然与低负荷 URTEP 相比，高负荷 URTEP 似乎增强了交叉教育效应，但在 4 周后，两种方法都可以实现动态力量的交叉教育。通过 URPEP，许多患者将受益于肌肉力量的交叉教育，即使是那些无法进行高负荷和短时间固定的患者。单侧阻力训练促进动态肌肉力量的交叉教育。然而，高负荷阻力训练增强了肌肉力量交叉教育的效果。
