■在残奥会举重比赛中,运动执行对称性是受个体运动员特征和运动策略影响的技术要求。识别与个人运动策略相关的元素可以为改善运动表现提供有价值的见解。因此,本案例系列研究旨在探讨肌肉激活对称性及其个体内和个体间变异性,以确定精英残奥会举重运动员中与个体运动策略主要相关的肌肉。
■前三角肌(AD)的双侧肌电图激活,胸大肌(PM),背阔肌(LD),在五名残奥会精英举重运动员中分析了三头肌(TRI)和外斜肌(EO)肌肉,同时进行了四组一次重复的残奥会卧推。获得并转换肌肉激活对称性指数(SI)以考虑独立于个体的评估。变异系数(CV),方差比(VR),计算和平均偏差(MD)以评估肌电图波形和SI的个体间和个体内变异性。
■转化和未转化的SI均表明DA中的整体对称激活,PM,TRI,和LD。在分组数据时,转化的SI显示EO的不对称肌肉激活(平均双侧差异:10%)。运动员在所有分析的肌肉中表现出低的个体内SI变异性(CV<10%),在DA中表现出低的个体间变异性。PM,LD,和TRI(CV<10%;VR:4%-11%;MD:29%-43%)。相比之下,在EO中观察到更高的个体间变异性(CV:23%;VR:23%;MD:72%-81%).
■运动员腹部肌肉激活的最高变异性和不对称性强调了针对这些肌肉的个性化训练方法的重要性,因为它们在个性化运动策略中的作用。
UNASSIGNED: In Paralympic powerlifting competitions, movement execution symmetry is a technical requirement influenced by individual athlete characteristics and motor strategies. Identifying the elements associated with individual motor strategies can offer valuable insight for improving sport performance. Therefore, this
case series study aimed to explore muscle activation symmetry and its intra- and inter-individual variability to determine the muscles mostly related to individual motor strategies in elite Paralympic powerlifters.
UNASSIGNED: Bilateral electromyographic activation of the anterior deltoid (AD), pectoralis major (PM), latissimus dorsi (LD), triceps (TRI) and external oblique (EO) muscles were analysed in five elite Paralympic powerlifters while performing four sets of one-repetition maximum of Paralympic bench press. Muscle activation symmetry indexes (SI) were obtained and transformed to consider individual-independent evaluation. The coefficient of variation (CV), variance ratio (VR), and mean deviation (MD) were computed to assess inter- and intra-individual variability in electromyographic waveforms and SI.
UNASSIGNED: Both transformed and non-transformed SI indicated overall symmetric activation in DA, PM, TRI, and LD. Transformed SI revealed asymmetrical muscle activation of EO when grouping data (mean bilateral difference: 10%). Athletes exhibited low intra-individual SI variability in all analysed muscles (CV < 10%) and low inter-individual variability in DA, PM, LD, and TRI (CV < 10%; VR: 4%-11%; MD: 29%-43%). In contrast, higher inter-individual variability was observed in EO (CV: 23%; VR: 23%; MD: 72%-81%).
UNASSIGNED: The highest variability and
asymmetry in abdominal muscle activation among athletes emphasize the importance of personalized training approaches for targeting these muscles due to their role in individualizing motor strategies.