Quantitatively assessing aging effects in rapid motor behaviours: a cross-sectional study.
Richard Hugh Moulton, Karen Rudie, Sean P Dukelow and 1 others
PMID 35883179WHAT IT FOUND
Older adults performed worse on rapid interactive tasks, but hand speed and movement area did not decline with age.
The drop in performance came from an inability to sustain high target-hit rates when overwhelmed, suggesting processing limits rather than basic motor weakness.
Key findings
01Basic motor parameters like hand speed and movement area showed no meaningful decline with age; in one task, hand speed actually increased slightly.
02Age-related performance drops were driven by a decline in steady-state rate (sustained hitting speed) and accuracy, not by slower movements.
03Sex had limited effect on performance, and aging-related declines were similar for men and women.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
Read the rest of this summary
You get three full summaries a month, free, and we do not ask for a card. Search, the TL;DRs and your library stay unlimited either way.
What it does not show
The study is cross-sectional, so it cannot track individual aging trajectories over time. Participants were healthy controls; results may not apply to those with neurological conditions. No formal cognitive tests were administered, so the link between observed performance drops and specific cognitive domains (like attention or processing speed) is inferred rather than measured. The findings are specific to the Kinarm robotic tasks and may not generalize to other motor behaviors.
Declared interests
Funded by Natural Sciences and Engineering Research Council of Canada, Queen’s University, Canadian Institutes of Health Research, and Ontario Research Council. No conflicts of interest declared.
The easy way to misread this
Do not interpret the lack of decline in hand speed as evidence that older adults have preserved motor function. The study shows that while basic movement mechanics remain intact, the ability to sustain performance in complex, interactive environments declines, likely due to processing limits rather than muscular weakness.