Have you ever wondered why your joints are stiff in the morning? There are a few reasons you may be feeling this.
Stiffening of Synovial Fluid
Just like a squeaky door hinge needs oil, your joints need lubrication to operate smoothly. Your body produces a natural lubricant known as synovial fluid. This viscous fluid fills where your bones meet and allows for smooth movement within your knees, elbows, and other joints (1).
The more you move around, the more this fluid circulates in your joints to keep everything gliding; hence my favorite phrase, “motion is lotion”. But when you rest, that lubricant sits and thickens. This phenomenon is sometimes called “morning gel” in reference to how synovial fluid stiffens like gelatin when allowed to rest (2).
But as you get older, that pain and stiffness may become more common and linger a little longer, given decreases in your synovial fluid.
Declining Collagen Levels
Collagen is the glue that holds your body together. It provides structure and support to all of your connective tissues, including your skin, bones, ligaments, tendons, and the cartilage that protects your joints. In fact, collagen makes up about 60% of the dry weight of cartilage (3).
Starting around your mid-to-late 20s, your natural collagen production begins to decline. And by the age of 40, you’re losing about 1% of your collagen per year (4). By 60 years old, you’ve lost roughly 50% of the collagen you were born with.
This steep decline in collagen is most likely correlated to many of the joint pains you may face: joint stiffness, popping and cracking, pain or discomfort, decreased shock absorption, reduced joint stability, limited range of motion, swelling and inflammation, impaired healing of joint tissue, increased risk of injury, and longer recovery times.