Research shows increased muscle activity during mastication under unstable sitting conditions, suggesting the need for stable postures.
Increased masseter and suprahyoid muscle activity under unstable sitting conditions suggests that a stable sitting posture is necessary for efficient mastication. The right trapezius muscle also exhibited greater activity under unstable sitting conditions, which may have been a compensatory response to enhance postural stability alongside the masticatory muscles.
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Morishita et al. (2026) studied this question.
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