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Thursday

 

Sit-to-Stand Biomechanics of Individuals with Multiple Sclerosis: STUDY
















































Image source: TOPLOWRIDERSITES

Abstract

Background:
It is unclear how people with multiple sclerosis, who often have compromised strength and balance, compare to healthy controls during sit-to-stand movements. The purpose of this study was to compare sit-to-stand biomechanics amongst three groups: people with multiple sclerosis who exhibit leg weakness, people with multiple sclerosis who have comparable strength to controls, and healthy controls.

Methods:
Twenty-one individuals with multiple sclerosis (n = 10 exhibiting leg weakness: n = 11 exhibiting comparable strength to controls), and 12 controls performed five sit-to-stand trials while kinematic data and ground reaction forces were captured. ANOVAs followed by Tukey’s post-hoc tests (α = 0.05) were used to determine group and limb differences for leg strength, movement time, and sagittal-plane joint kinematics and kinetics.

Findings:
Persons with multiple sclerosis exhibiting leg weakness displayed decreased leg strength, greater trunk flexion, faster trunk flexion velocity and decreased knee extensor power compared to the other two groups (p < 0.05; d ≥ 0.87), and slower rise times compared to controls(p < 0.03; d ≥ 1.17). No differences were found between controls and the multiple sclerosis-comparable strength group. Across all 3 groups, leg strength was moderately correlated with trunk kinematics and knee extensor velocities, moments and powers of the sit-to-stand (p ≤ 0.05).

Interpretation:
Participants with multiple sclerosis exhibiting leg weakness took longer to stand and appeared to use a trunk-flexion movement strategy when performing the sit-to-stand. The majority of group differences appear to be a result of leg extension weakness. Treatment that includes leg strengthening may be necessary to improve sit-to-stand performance for people with multiple sclerosis.

Story Source: The above story is based on materials provided by CLINICALBIOMECHANICS
Note: Materials may be edited for content and length

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