Duration of morning stiffness Morning stiffness usually lasts longer than 1 hour. Morning stiffness usually lasts less than 1 hour.
[uwhealth.org]
The length of time for morning stiffness decreased by 28 minutes.
[doi.org]
It is often accompanied by signs and symptoms—lengthy morning stiffness, fatigue, and weight loss—and it may affect various systems of the body, such as the eyes, lungs, heart
[apma.org]