Exploring lower limb muscle activity and performance variations during instrumented Sit-to-Stand-to-Sit in sedentary individuals: Influence of limb dominance and testing modalities
Metadatos
Mostrar el registro completo del ítemAutor
Torres Banduc, Maximiliano A.; Jerez Mayorga, Daniel Alejandro; CHIROSA RÍOS, LUIS JAVIER; Chirosa-Ríos, ChirosaEditorial
Elsevier
Materia
Sit-to-stand Surface electromyography Muscle activity
Fecha
2024-06-18Referencia bibliográfica
Torres Banduc, M. et. al. 283 (2024) 114618. [https://doi.org/10.1016/j.physbeh.2024.114618]
Patrocinador
Grant A.SEJ.227.UGR23 funded by Consejería de Universidad, Investigación e Innovación and by ERDF Andalusia Program 2021–2027Resumen
Purpose: to explore lower limb muscle activity concerning limb dominance, as well as variations in force and
power during the standing up and sitting down phases of the instrumented sit-to-stand-to-sit test in sedentary
individuals, across isokinetic and isotonic modalities.
Methods: 33 sedentary individuals underwent testing using a functional electromechanical dynamometer in both
isokinetic and isotonic modes, accompanied by surface electromyography.
Results: In the isokinetic mode, the non-dominant gastrocnemius medialis and vastus medialis exhibited significantly
(p < 0.05) higher muscle activity values during the standing up and sitting down phase compared to
dominant counterparts. In the isotonic mode standing up phase, significant differences in muscle activity were
noted for non-dominant gastrocnemius medialis, vastus medialis, and biceps femoris compared to their dominant
counterparts. The sitting down phase in isotonic mode showed higher muscle activity for non-dominant vastus
medialis compared to dominant vastus medialis. Regard to performance outcomes, significantly lower (p <
0.0001) values were observed for standing up (12.7 ± 5.1 N/kg) compared to sitting down (15.9 ± 6.1 N/kg)
peak force, as well as for standing up (18.7 ± 7.8 W/kg) compared to sitting down (25.9 ± 9.7 W/kg) peak
power in isokinetic mode. In isotonic mode, lower values were found for sitting down (6.5 (6.3–7.1) N/kg)
compared to standing up (7.8 (7.3–8.9) N/kg) peak force and for sitting down (18.5 (13.2–21.7) W/kg)
compared to standing up (33.7 (22.8–41.6) W/kg) peak power.
Conclusions: Limb dominance influences lower-limb muscle activity during the instrumented sit-to-stand-to-sit
test, and the choice of testing mode (isokinetic or isotonic) affects muscle engagement and performance
outcomes.