Problems of lower limb loading symmetry during sit-to-stand in ambulatory individuals with stroke

Abstract

Existing evidence on lower limb loading symmetry and movement stability of patients with stroke commonly involves data during standing and stepping, without clear evidence for sit-to-stand (STS) ability. This study investigated the lower limb loading during sit-to-stand (LLL-STS) in 39 ambulatory individuals with chronic stroke during usual and optimal conditions using digital load cells as compared to those found in 10 healthy individuals. During the tests, participants were instructed to perform a sit-to-stand movement in 2 conditions, including 1) at their usual manner, and 2) at their optimal manner with the attempt to put their body-weight on the lower limbs as symmetrically as they could. The findings indicated that the participants had maximal LLL-STS of 47% and 75% of their body-weight in the affected and non-affected limb, respectively, resulting in the LLL-STS symmetry of 62%, whereas the LLL-STS symmetry in healthy individuals were nearly 100%. However, the LLL-STS symmetry of stroke participants was significantly increased to 73% when they attempted to take body-weight onto both lower extremities equally. The findings suggested that the participants retained some capability that they did not usually access. The findings suggested the use of verbal commands as an alternative rehabilitation strategy to promote LLL-STS symmetry of individuals with chronic stroke.