GAIT PARAMETERS ASSOCIATED WITH RESPONSIVENESS TO A TASK-SPECIFIC AND/OR STRENGTH TRAINING PROGRAM POST-STROKE.
Bibliographic record
Abstract
Purpose/Hypothesis: After stroke, patients exhibit weakness that contributes to decreased walking velocity and increased disability. While evidence exists that patient's post-stroke respond to task-specific and strength training programs, it is not clear which biomechanical parameters of gait are most influential in improved walking outcome. The purpose of this study was to identify the gait parameters associated with responsiveness to a task-specific and/or strength training program designed to improve locomotor recovery. Number of Subjects: 20 subjects, ranging from 4 to 60 months post-stroke. Materials/Methods: Subjects completed one of four training regimens consisting of a combination of two of the following: body weight supported treadmill training; lower extremity (LE) resisted cycling, progressive resistive LE strengthening, or a sham condition (arm ergometry). Each subject received 24 treatment sessions (1 hour/day; 4x/week; 6 weeks), and the exercises were alternated each day. Subjects ambulated at a self-selected velocity across a 10-meter walkway using customary assistive devices, but no lower extremity orthoses, both at baseline and post intervention. Kinematics and kinetics of the hemiparetic LE were recorded with a VICON motion system and a Kistler force plate. Electromyographic activity was recording using indwelling, fine wire electrodes in soleus, anterior tibialis, vastus intermedius, rectus femoris, semi-membranosus, adductor longus, gluteus maximus and gluteus medius. Changes in LE kinematics, kinetics, and muscle activation intensities for the 10 subjects with the greatest increase in velocity (HI group) were compared with those of subjects with less improvement (LO group) using an independent T-test with a p value of < .05. Results: Velocity increased after intervention by 0.144 m/sec with the HI group vs. 0.016 m/sec with the LO group. Subjects in the HI group displayed greater increases of preswing ankle plantarflexion angle [+3.8 deg vs −0.2 deg], ankle plantarflexion power [+0.248 W/kgm vs +0.031 W/kgm], terminal stance hip extension angle [+5.8 deg vs −0.7deg], hip flexor moment [+0.154 Nm/kgm vs −.031 Nm/kgm], and hip flexor power [+0.188 W/kgm vs 0.006 W/kgm]. Furthermore, intensity of soleus activation was also significantly greater in the HI group subjects after the intervention [15%max vs 0.3%max]. Conclusions: Increased activation of soleus, promoting an improvement of the trailing limb posture, combined with changes in hip and ankle bio-mechanics during terminal stance and pre-swing, were associated with the greatest increase in gait velocity in individuals post-stroke that completed a task-specific and/or strength training program designed to improve loco-motor recovery. Clinical Relevance: Biomechanical analyses can be an effective tool for understanding the mechanisms that underlie responsiveness to physical therapy interventions, therefore allowing a more targeted approach to ameliorating impairments to function. Supported by The Foundation for Physical Therapy as part of PT ClinResNet.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".