Influence of chair seat forward tilt angle on upper limb dexterity improvement in seated tasks: a pilot study.
Kouji Iwamoto, Shouta Kataoka, Kenichi Kobara and 4 others
PMID 39239403WHAT IT FOUND
With a knee pad, a 30-degree forward seat tilt produced a mean of 32.5 pegboard pins in 60 seconds in 17 healthy men, versus 29.7 at 0 degrees and 30.6 at 15 degrees.
Key findings
01With knee support used in all conditions, the 30-degree tilt had significantly higher pegboard pin counts than the other two conditions.
02With knee support used in all conditions, the 30-degree tilt had significantly higher ease ratings than the other two conditions.
STILL TO COME
How it was doneWhat they foundWhat it means for OTs
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What it does not show
The study was a pilot with 17 healthy men, so it cannot show what happens in wheelchair users, people with pain, or people with neurological conditions. The authors said the sample size was insufficient for this design. The chairs used were not standard wheelchair seats, so the setup may not transfer to a patient's wheelchair. The tilt angle was tested only with a knee pad and adjusted foot, seat, and table positions, so the effect of a tilt without those supports is not known. The paper's trunk inclination result is inconsistent: the text says the 30-degree condition had higher values, while the reported values are lower.
Declared interests
This work was supported by JSPS KAKENHI grant no. 22K11303. The authors declared no conflicts of interest.
The easy way to misread this
Do not treat a 30-degree forward seat tilt as proven seating advice for wheelchair users. The study was a pilot in 17 healthy men, the authors said the sample size was insufficient, the chairs used differed from standard wheelchair seats, and every tested condition also used a knee pad.