Ever noticed that your muscles feel more sore when it's cold? There's a reason for that. Experts explain why and how to fix it.

It’s easy to blame aging, an old mattress, or a poor night’s rest when you wake up feeling stiff and achy. It's true that those things can make you feel stiff in the morning. But if it happens a lot, ...

Knee tightness could be a symptom of an injury, arthritis, or muscle weakness in your quads. While gentle stretches and exercise can offer relief, you may want to talk with a healthcare professional ...

Potential causes of knee stiffness include injury, arthritis, or arthrofibrosis. Certain types of arthritis are more common in older adults and people with previous knee injuries. People may be able ...

The arteries are blood vessels that deliver oxygen and vital nutrients to all the vital organs and peripheries in the body. The heart pumps blood through these vessels and with each pulse blood flows ...

Hydrogels are soft, jelly-like materials that can absorb large amounts of water. They are widely used in medical technologies ...

Your hip joint helps you move from a sitting position to a standing, walking, running, or jumping position. These activities are difficult, if not impossible, with a stiff hip. Each step or movement ...

Design engineers routinely rely on bolted joints, yet most guidance focuses on axial stiffness—often overlooking moment (pitch) stiffness, which can dominate compliance in ...