Influence of history of falls and physical function on obstacle-straddling behavior.
Daisuke Sudo, Yusuke Maeda
PMID 36866013WHAT IT FOUND
Older adults with a history of falls or poor balance stepped more slowly and bent their hips more when crossing obstacles than those with good balance.
They relied on large hip movements to clear the obstacle, likely because their legs could not generate enough forward push.
Key findings
01Participants classified as high-fall-risk had significantly worse balance and mobility scores than low-fall-risk participants.
02When crossing obstacles, high-fall-risk participants took significantly longer steps and bent their hips more than low-fall-risk participants.
03The high-fall-risk group's strategy involved slowing down and using large hip flexion to ensure foot clearance, rather than maintaining normal walking speed.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTs
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What it does not show
The study used 2D video analysis, which is less accurate than 3D motion capture systems for measuring complex joint movements. Force plates were not used, so the researchers could not measure the actual forces generated by the legs, only the resulting movements. The sample size was small (32 participants), which limits the generalizability of the findings. The study did not analyze the approach phase before the obstacle, so it is unclear when the stride adjustment began.
Declared interests
The authors declared no conflicts of interest.
The easy way to misread this
Do not assume that high hip flexion is a sign of good technique. In this study, it was a compensatory strategy used by people with poor balance and slow walking speed to avoid tripping, not a sign of strength or stability.