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Symptoms of morning stiffness include stiff and painful joints that take time to loosen up after getting out of bed. This can severely impact quality of life in some instances, taking several hours to alleviate. Participants who slept on the Vestims MRS reported experiencing significantly less morning stiffness upon waking compared to when sleeping on their traditional mattress. This may be due to the improvement of endothelial function, which is the body's ability to distribute blood flow effectively. (Reference: https://pubmed.ncbi.nlm.nih.gov/31600104/)