Bilateral deficit in explosive force related to sit-to-stand performance in older postmenopausal women.
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Autor/esJakobi, JM; Ruiz Cárdenas, Juan Diego; Rodríguez Juan, Juan José; Ríos Díaz, José; Marín Cascales, Elena; [et al.]
Disciplina/sActividad Física y Deporte
Terapia y Rehabilitación
Materia/sActivities of day living; Bilateral index; Muscle strength; Rate of force development
The purpose of this study was to determine whether the bilateral deficit (BLD) for maximal voluntary force (MVF) and rate of force development (RFD) influences sit-to-stand in older postmenopausal women. Fourteen women performed unilateral and bilateral maximal voluntary contractions during isometric leg-extension. The MVF and RFD over consecutive 50ms periods (0-50, 50-100 and 100-150ms) after force onset and the time to sit-to-stand test were calculated. There was only a BLD for RFD 0-50ms and 50-100ms. The time of sit-to-stand was moderately correlated to BLD for RFD 0-50ms (r=0.505; 95% CI: -0.035 to 0.817; P=0.06), but after controlling for physical activity level the relationship was stronger and statistically significant (r=0.605; 95% CI: 0.109 to 0.859; P=0.029). These results suggest that the BLD for explosive force (0-50ms) might represent a performance-limiting factor for sit-to-stand transfer in postmenopausal women and could be dependent of the physical activity level. Tri...