You’re Getting Older
As you age, your cartilage — the spongy material that protects the ends of your bones — begins to dry out and stiffen. Your body also makes less synovial fluid, the stuff that acts like oil to keep your joints moving smoothly. The result: Your joints may not move as freely as they used to. It sounds a little crazy, but the best thing you can do is keep on trucking. Synovial fluid requires movement to keep your joints loose.
When you’re asleep and still for several hours, the fluid that helps your joints move easily can’t do its job. That’s why you wake up with knees or hands that are stiff and swollen. To make it better, try to move around more during the day.
Article submitted to MSRN by Pat France, MSRN