Comparing Temporospatial Performance During Brisk and Self-Paced Walking by Men With Osteomyoplastic Transfemoral Amputation and Controls Using Pressure and Muscle Activation Peak Times.
Monique O Shotande, Kimberly P Veirs, Jonathan D Day and 3 others
PMID 36188948WHAT IT FOUND
Intact-limb hip muscle co-contraction occurred throughout the gait cycle in six men with osteomyoplastic transfemoral amputation, and socket pressure peaks were most likely during weight acceptance and push-off.
This describes timing patterns, not proof that exercises improve gait.
Key findings
01In participants with OTFA, socket pressure peaks were most likely before 61% of the gait cycle and during weight acceptance (0-30%) and push-off (30-60%).
02Peak hip-muscle activation times differed significantly between brisk and self-paced walking in both OTFA participants and controls.
03In OTFA participants, co-contraction of intact-limb muscles occurred throughout the gait cycle, while residuum co-contraction was mainly during weight acceptance and push-off.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
Only six men with OTFA and six matched controls were analysed, so the findings are descriptive and not conclusive. The study was cross-sectional and tested no rehabilitation intervention, so it cannot show that exercises improve gait stability. The OU-PAM pressure system was not validated in transfemoral amputation and did not instrument foot pressures in the OTFA group. Intact-limb pressures were not instrumented, so stance timing for the intact limb was inferred from loading and unloading of the residual limb. Some participants did not complete the second visit, and only one visit was selected for analysis. One participant with OTFA had knee disarticulation, and residuum length and available muscle mass varied, which may confound results. Gait asymmetry may have been affected by participants rounding corners, and video was not recorded to identify those strides. Participants were healthy men aged 18-64, so it says nothing about women, children or people with other conditions.
Declared interests
Funded in part by the Oklahoma Center for the Advancement of Science and Technology Health Research Program (HR11-097); authors declared no commercial or financial relationships.
The easy way to misread this
Do not treat these muscle-timing patterns as proof that hip-strengthening exercises improve gait stability. This was an observational study of six men with OTFA, no intervention was tested, and the pressure system was not validated in transfemoral amputation.