How does degenerative arthritis progress over time, and what are the early warning signs?

How does degenerative arthritis typically progress over time in patients, what stages of the disease should be expected, and what early signs or symptoms might indicate the onset of this condition before significant joint damage occurs?

This condition occurs when the protective cartilage in joints wears down over time. I noticed mine first as stiffness in the morning and mild swelling after long periods of activity. Over time, pain became more noticeable, but low-impact exercise made a difference.