Publicação
Intermuscular coordination in strength training: a transversal study with power clean
| Resumo: | Muscle synergy extraction has been utilized to investigate muscle coordination in human movement, namely in sports field. However, there is a lack of information regarding strength training complex motor tasks. Thus, the aim of this thesis was to ensure that this procedure is reliable within- and between-days, and to compare neural strategies adopted by two populations with different levels of expertise. Twelve unexperienced participants and 7 weightlifters performed sets of power cleans, and muscle synergies were extracted from electromyography (EMG) data of 16 muscles. First, we analyzed muscle synergies reliability within the untrained subjects. Then, we compared them with the weightlifters to look for different coordination strategies. We observed that synergistic organization of muscle coordination during power clean remained stable across repetitions, sets and days in unexperienced subjects with slight time adjustments and muscle weightings variations within each synergy. In the other hand, although the same number of synergies has been extracted, all synergies presented slight time shifts between groups, and muscle weightings within each synergy were highly variable. Therefore, these results point to an interventional approach to identify how unexperienced subjects modify coordination over time. |
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| Autores principais: | Santos, Paulo Duarte Guia dos |
| Assunto: | Muscle synergies Electromyography Muscle coordination Power clean Strength training Reliability Expertise Nonnegative matrix factorization Olympic weightlifting Muscle patterns Sinergias neuromusculares Eletromiografia Coordenação Power clean Treino de força Reprodutibilidade Expertise Factorização não-negativa de matrizes Halterofilismo Padrões de ativação |
| Ano: | 2019 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório da Universidade de Lisboa |
| Resumo: | Muscle synergy extraction has been utilized to investigate muscle coordination in human movement, namely in sports field. However, there is a lack of information regarding strength training complex motor tasks. Thus, the aim of this thesis was to ensure that this procedure is reliable within- and between-days, and to compare neural strategies adopted by two populations with different levels of expertise. Twelve unexperienced participants and 7 weightlifters performed sets of power cleans, and muscle synergies were extracted from electromyography (EMG) data of 16 muscles. First, we analyzed muscle synergies reliability within the untrained subjects. Then, we compared them with the weightlifters to look for different coordination strategies. We observed that synergistic organization of muscle coordination during power clean remained stable across repetitions, sets and days in unexperienced subjects with slight time adjustments and muscle weightings variations within each synergy. In the other hand, although the same number of synergies has been extracted, all synergies presented slight time shifts between groups, and muscle weightings within each synergy were highly variable. Therefore, these results point to an interventional approach to identify how unexperienced subjects modify coordination over time. |
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