Relationship between leg and back strength with inter-joint coordination of females during lifting

Type de document

Études primaires

Année de publication

2016

Langue

Anglais

Titre de la revue

International Journal of Industrial Ergonomics

Première page

32

Dernière page

40

Résumé

The role of strength and fatigue in the lifting technique is not very clear, especially with regards to inter-joint coordination. We examined the relationships between muscle strength and endurance with inter-joint coordination of the knee-hip (KH) and hip-back (HB) during a lifting task performed until exhaustion. Thirteen healthy females were recruited to participate in the study. Significant negative correlations were found between HB maximum relative phase angle and leg lifting strength (r = −0.805), knee extensor strength (r = −0.705), knee flexor strength (r = −0.633), back extensor strength (r = −0.593) and back flexor strength (r = −0.596). The greater the strength of these muscles, the more synchronized the hip-back inter-joint coordination. However, no significant relationships were found with endurance test performance. Moreover, although the lifting task induced muscle fatigue, there were no significant fatigue-induced changes in lifting coordination.

Mots-clés

Jambe, leg, Force musculaire, Muscular strength, Femme, Woman, Coordination des mouvements, Coordination of movements, Force de soulèvement, Lifting strength, Soulèvement des charges, Manual lifting, Dos, Back

Numéro de projet IRSST

0099-8020

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