Dynamic balance changes within three weeks of fitting a new prosthetic foot component.
Jenny A Kent, Nicholas Stergiou, Shane R Wurdeman
PMID 28704685WHAT IT FOUND
After three weeks with a new prosthetic foot, individual dynamic balance changed, but group averages did not show a consistent change over time or between foot types.
The changes were not the same across people.
Key findings
01Walking speed increased with both prosthetic foot types after the three week adaptation period.
02Grouped medial-lateral dynamic balance did not show a consistent change over time or between foot types.
03For the Higher Activity prosthesis, one third of participants showed a significant change on the prosthetic side and over one third on the sound side.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The study included only 21 experienced, high-activity unilateral transtibial amputees, so it says little about people who are not experienced high-activity users. No patient-reported balance, falls, or functional balance tests were collected, so it is unclear whether the measured balance changes matter to daily life. Grouped results hid individual differences because some participants increased and others decreased their stability margins. The average change is therefore hard to interpret. One participant in the Lower Activity group received a multi-articulated flexible keel foot instead of a Solid Ankle Cushioned Heel foot, so the lower activity component was not identical for everyone. The authors interpreted some balance changes as reflecting confidence based on anecdotal clinical observations, not measured confidence or fall outcomes.
Declared interests
The authors declared no conflicts of interest.
The easy way to misread this
Do not conclude that the Higher Activity foot produces better dynamic balance than the Lower Activity foot. The grouped foot comparisons did not show a consistent difference, and individual changes varied in direction, so the study does not establish one foot type as superior.