A leading cartilage and joint preservation specialist, Professor Paul Lee, has revealed one of the most damaging daily habits for your joints: sitting still for long hours. While many believe protecting joints requires intense exercise, strict diets, or costly supplements, the reality is simpler and more concerning. The modern lifestyle—characterised by office work, long commutes, and remote working—has led many to spend eight, ten, or even twelve hours mostly inactive.
Professor Lee explains that this prolonged stillness quietly harms joints because cartilage is biologically different from muscles. Unlike muscles, cartilage lacks a direct blood supply and instead depends on joint fluid to receive nutrients. Sitting for extended periods slows the circulation of this fluid, impairing cartilage health. According to Lee, cartilage acts more like a sponge than a muscle; regular movement compresses and releases the joints, allowing vital nutrients to flow.
He emphasizes that the solution isn’t about becoming an athlete overnight. “You do not need to become a marathon runner. But your joints do need movement to stay biologically active,” he says. Simple habits, such as standing up regularly during the day, can significantly benefit joint health by “feeding” cartilage cells fresh nutrients and energy.
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Lee also points out that the current messaging around joint health is often too extreme or simplistic. People tend to view themselves as “healthy” if they exercise vigorously a few times a week or “unhealthy” if they have sedentary jobs. However, joint biology is subtler: sitting at a desk isn’t inherently harmful and might even protect cartilage against excessive physical strain. The real issue is the extended periods of inactivity without enough low-level movement.
Instead of focusing solely on traditional exercise routines like gym sessions or running, Lee advises prioritising consistent, gentle movement throughout the day. The body responds best to small, frequent movements that keep joints stimulated enough to maintain their healthy biological function.