Modification of kinematic and electromyographic patterns in the lower limb by the use of cell phones

Oscar Valencia*, María José Hudson, Felipe Carpes, Marcos Kunzler, Fernanda Gándara, Isidora Le Roy, Rodrigo Antonio Guzmán Venegas

*Autor correspondiente de este trabajo

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

1 Cita (Scopus)

Resumen

Pedestrian injuries related to the use of cell phone have increased in relation to the total number of pedestrian accidents. The aim of this study was to compare kinematic and electromyographic variables in both lower limbs at facing an obstacle, with (WC) and without (WoC) the use of a cell phone. Ten young women were evaluated, while walking and facing an obstacle WC and WoC. A 3D biomechanical model was used to evaluate the lower limb kinematics (hip, knee, ankle in the sagittal plane, together with «toe clearance»). At the same time, the electromyographic (EMG) activity was registered in the following muscles: tibialis anterior (TA), gastrocnemius medialis (GM), rectus femoris (RF) and biceps femoris (BF). The mean EMG amplitude of each muscle and the muscular coactivation percentage between: TA-GM and RA-BF were calculated. The strategy for both lower limbs considering the first (P1) and the second step (P2) were analyzed when crossing the obstacle, comparing between gait WC vs WoC. According to results, the gait WC increase the toe clearance, hip flexion, and the GM amplitude, observed both in P1 as P2 when the person crossed the obstacle. Furthermore, the P2 revealed an increase in the knee and ankle flexion. On the other hand, the TA amplitude and the muscular coactivation between TA-GM also increased WC in the P2. In conclusion, the kinematic and electromyographic variables in the lower limbs are modified when crossing an obstacle WC. These findings could indicate a protective strategy during the dual-task evaluated, minimizing the risk of falling.

Título traducido de la contribuciónModification of kinematic and electromyographic patterns in the lower limb by the use of cell phones
Idioma originalEspañol
Páginas (desde-hasta)354-358
Número de páginas5
PublicaciónRetos
N.º39
DOI
EstadoPublicada - 2021

Nota bibliográfica

Publisher Copyright:
© Copyright: Federación Española de Asociaciones de Docentes de Educación Física (FEADEF).

Palabras clave

  • Dual task
  • Electromyography
  • Gait with obstacle
  • Kinematics

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