| Texto completo | |
| Autor(es): |
Dias, Mateus S.
;
Freitas, Sandra M. S. F.
;
De Freitas, Paulo B.
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | BRAZILIAN JOURNAL OF MOTOR BEHAVIOR; v. 19, n. 1, p. 10-pg., 2025-01-01. |
| Resumo | |
BACKGROUND: Stabilization of vertical body oscillation (i.e., vertical trajectory of the center of mass-COMv) is critical for running efficiency and performance and may be influenced by running speed. AIM: To investigate the presence of a multi-joint synergy that stabilizes COMv during treadmill running and evaluate the effect of running speed on this synergy using the Uncontrolled Manifold (UCM) framework. METHODS: Twenty-eight experienced runners (22-51 years old) ran on an instrumented treadmill at 2.5, 3.5, and 4.5 m/s. Ankle, knee, and hip angles (sagittal plane) and pelvis obliquity were used as elemental variables (DOF=4) to calculate the synergy index (Delta Vz), the normalized difference between variance components in the joint space that did not affect (VUCM) and those that did affect (VORT) vertical body oscillation (i.e., COMv) during the stance phase (1-100%). Statistical parametric mapping (SPM) analysis was used to identify the presence of synergy and the influence of speed. RESULTS: Across all speeds, a synergy (Delta Vz>0) was present, except between 13% and 17% at the slowest speed. Delta Vz was not affected by speed. While VORT remained unchanged across speeds, VUCM was higher at the fastest speed between 7% and 43% of the stance phase. INTERPRETATION: The findings indicate a robust multi-joint synergy that stabilizes vertical body oscillation during the stance phase of running. Although running speed did not disrupt this synergy, higher speeds were associated with increased "good" joint variability, suggesting enhanced flexibility of the motor control system without compromising stability of vertical body oscillation. (AU) | |
| Processo FAPESP: | 21/10105-0 - Controle sinergético do deslocamento vertical do pé durante a fase de balanço na corrida: análise pela abordagem da variância não controlada |
| Beneficiário: | Mateus Santos Dias |
| Modalidade de apoio: | Bolsas no Brasil - Iniciação Científica |
| Processo FAPESP: | 20/11317-9 - Controle sinergético da estabilidade da altura mínima pé-solo durante a fase de balanço do andar: análise pela abordagem da variância não controlada |
| Beneficiário: | Paulo Barbosa de Freitas Júnior |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |