Abstract:
BACKGROUND:Weight bearing through, or "loading" of, the paretic lower extremity and transfer of weight from one lower extremity to the other are important impairment-level goals of stroke rehabilitation. Improvements in these limb-loading and weight-transfer abilities have been shown to relate to improved performance of many functional activities. Unfortunately, valid and practical clinical measures of paretic-lower-extremity loading and weight transfer have not been identified. OBJECTIVE:The purpose of this study was to assess convergent validity of the Step Test (ST) and the knee extension component of the Upright Motor Control Test (UMCe) as measures of paretic-limb loading and of the Repetitive Reach Test (RR) as a measure of weight transfer in the first 6 months after stroke. DESIGN:This was a prospective cohort study of 33 adults with lower-extremity motor impairment following unilateral, noncerebellar stroke. Participants were tested one time per month from 1 to 6 months poststroke. RESULTS:Scores on the ST (performed with the nonparetic leg as the stepping leg) and UMCe were positively correlated with peak vertical ground reaction forces (GRFs) beneath the paretic limb during functional tasks (R(2)=.35-.76 for the ST, pseudo R(2)=.21-.34 for the UMCe). Scores on the RR were positively correlated with change in vertical GRF beneath the paretic limb during the diagonal reach task (R(2)=.45) and with weight-transfer time during stepping with the nonparetic limb (R(2)=.15). CONCLUSIONS:The ST, performed with the nonparetic leg as the stepping leg, is a valid measure of paretic-limb loading during stroke recovery. Of the clinical measures tested, the ST correlated most strongly with the force platform measures.
journal_name
Phys Therjournal_title
Physical therapyauthors
Mercer VS,Freburger JK,Chang SH,Purser JLdoi
10.2522/ptj.20080230subject
Has Abstractpub_date
2009-07-01 00:00:00pages
653-64issue
7eissn
0031-9023issn
1538-6724pii
ptj.20080230journal_volume
89pub_type
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