Stiff person syndrome is a rare autoimmune neurological disorder that is more common in women. Celine Dion has been diagnosed with the condition.

That deep ache you feel a day or two after training isn’t random—it’s a powerful biological signal that your body is rebuilding stronger than before.

Stiffness often accompanies back pain. On hands and knees, slowly arch your back upward, then gently lower it into a comfortable hollow. Move in a controlled manner without forcing the range. Perform ...

An elephant can lift a log, swing sand onto its back, and still pick up a peanut without crushing it. That mix of strength and delicacy has always looked a little mysterious, especially because ...

Abstract: Electromagnetic negative stiffness springs have been widely used in low-frequency vibration isolation because they can achieve high-static-low-dynamic stiffness (HSLDS) and stiffness control ...

Abstract: Motor gearbox systems are widely used in industrial production, and the variations of gear meshing stiffness generate transient frequency modulation (FM) effects on motor current. The ...