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Article Abstract
Objective: To compare the metabolic demands of walking in individuals with lower limb injury with and without ankle-foot orthosis (AFO) use. A secondary aim was to compare these results with those from individuals with unilateral transtibial amputation (TTA) and able-bodied controls.
Design: Cross-sectional study.
Setting: Two clinical research centers.
Participants: Thirteen individuals (N=13) with lower limb injury who used a passive-dynamic AFO underwent metabolic analysis at 3 standardized speeds with and without their AFO. Results were compared with individuals with unilateral TTA who used a passive prosthetic foot and able-bodied controls with no musculoskeletal, neurologic, or cardiovascular deficits.
Main Outcome Measures: Oxygen consumption, heart rate, and rating of perceived exertion.
Results: The use of the passive-dynamic AFO did not significantly change energetic demand (oxygen consumption, heart rate, perceived exertion) in participants with a lower limb [LL] injury. Heart rate (P<.037) was significantly greater than able-bodied controls, but perceived exertion was significantly lower (P≤.031). There were no significant differences between participants with an LL injury (with or without the AFO) and individuals with TTA.
Conclusions: Many individuals with LL injuries may expect to use passive-dynamic AFOs with little to no metabolic consequence. The stabilizing and assistive benefits of the AFO likely balance with its well-known range of motion limitations and power reductions. Passive-dynamic AFO use can sometimes be an alternative for individuals considering TTA. These results support that AFO users may be able to achieve similar energetic demands as those with amputation.
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| http://dx.doi.org/10.1016/j.apmr.2022.02.019 | DOI Listing |
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