![]() ![]() Thus, the mathematical procedure for the extraction of muscle synergies through nonnegative matrix factorization (NMF) may be considered a reliable method to study muscle coordination adaptations from muscle strength programs.Įlectromyography muscle coordination neural adaptations reliability strength training. The present findings revealed that the muscle synergies extracted during the power clean remained stable across sets and days in unexperienced participants. These tasks are assumed to be controlled by three main processes: cortical contributions related to voluntary command and high-level control, control of rhythmical activation by the spinal motorneurons through the central pattern generators (CPGs), and online reflex-driven adjustments (Ivanenko et al. Inter-day muscle synergy vectors had moderate similarity, while the variables regarding temporal activation were still strongly related. Intra-day VAF, muscle synergy vectors, synergy activation coefficients and individual EMG profiles showed high similarity values. muscle synergies involves muscle groups that are activated in a fixed. Three muscle synergies accounted for almost 90% of variance accounted for (VAF) across sets and days. At each running speed, inter-condition similarity was observed in synergy vector (r > 0.83) and synergy activation coefficients (r > 0.84) at each type of. condition similarity of the synergy activation coefficients was high for the four. Twelve unexperienced participants performed four sets of power cleans in two test days after strength tests, and muscle synergies were extracted from electromyography (EMG) data of 16 muscles. Therefore, the aim of the study was to evaluate intra- and inter-day reliability of a strength training complex task, the power clean, assessing participants' variability in the task across sets and days. The reliability of the method has been proposed, although it has not been assessed previously during a complex sportive task. Recent experiments have indicated that many motor behaviors are controlled through the flexible combination of a small number of muscle synergies. Muscle synergy extraction has been utilized to investigate muscle coordination in human movement, namely in sports. Here a muscle synergy is defined as the coordinated recruitment of a group of muscles with specific activation balances or specific activation waveforms. ![]()
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