Effects of simulated kyphosis posture on swallowing and respiratory functions.
Manabu Uchida, Kohei Yamaguchi, Tomoe Tamai and 2 others
PMID 37529064WHAT IT FOUND
Simulating severe kyphosis lowered measured swallowing muscle activity, tongue pressure, vital capacity, and cough peak flow in healthy young adults compared with upright posture.
This was a posture simulation, not evidence about older patients with real kyphosis.
Key findings
01Severe simulated kyphosis showed lower suprahyoid muscle amplitude (0.21 ± 0.07 μV) and lower tongue pressure (35.5 ± 6.9 kPa) than vertical posture.
02Severe simulated kyphosis showed lower vital capacity (2.7 ± 0.8 L) and %VC (79.3 ± 12.7%) than vertical posture.
03Severe simulated kyphosis showed lower cough peak flow (260.5 ± 38.5 L/min) than vertical and moderate kyphosis.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for SLPs
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What it does not show
The participants were healthy young adults, not older patients with kyphosis or dysphagia. The study simulated kyphosis with an experience suit in a controlled setting, so it may not match real postural changes. Swallowing was assessed indirectly through suprahyoid muscle amplitude and tongue pressure, not by endoscopic or clinical aspiration measures. The paper did not test a posture correction intervention or measure functional swallowing outcomes.
Declared interests
The authors declared no conflicts of interest. The study was funded by the Japan Society for the Promotion of Science.
The easy way to misread this
Do not conclude that correcting kyphosis improves swallowing or breathing in older patients with dysphagia. The study measured indirect swallowing and respiratory values in healthy young adults while simulating posture, and it did not test treatment outcomes or aspiration risk.