It’s a symptom of modern life for many people
A surgeon has shared one of the worst things you can do for your joints every day. When people think about protecting their joints, they often assume the answer is extreme exercise, strict diets or expensive supplements.
But according to cartilage and joint preservation specialist Professor Paul Lee, one of the worst things many people are doing to their joints every day is sitting still for hours at a time. Modern office life, long commutes and working from home have dramatically changed how people move throughout the day.
Many now spend eight, 10 or even 12 hours largely stationary, often without realising the effect this can quietly have on their joints over time. Professor Lee said the issue is not about blaming people or calling them lazy – he believes that kind of messaging is completely unhelpful.
He added: “We should not make people feel guilty for modern working patterns. Humans were simply not designed to stay still for 10 hours a day. Modern office life may be starving our joints quietly. Not because people are lazy, but because the body evolved around regular low-level movement.”
Unlike muscles, cartilage behaves very differently biologically.
Professor Lee continued: “Cartilage has no direct blood supply; it feeds from joint fluid. If we sit still all day, that fluid circulation slows down.
“Cartilage behaves more like a sponge than a muscle. Movement helps compress and release the joint, allowing nutrients to circulate.”
This means joints rely heavily on regular and gentle movement to stay biologically active and healthy. Professor Lee stressed that this does not mean people suddenly need to become fitness fanatics.
He added: “You do not need to become a marathon runner. But your joints do need movement to stay biologically active.”
In many cases, simply standing up more regularly throughout the day could help.
Professor Lee continued: “Your joints are biologically designed for gentle movement. Standing up regularly may help ‘feed’ the cartilage cells fresh nutrients and energy.”
The message around joint health has become too extreme and overly simplistic, he added. Many people assume they are either “healthy” because they exercise intensely a few times a week or “unhealthy” because they sit at a desk job.
But joint biology is often more subtle than that. Sitting at your desk all day is not necessarily damaging in itself and, in some cases, may even temporarily protect cartilage from excessive physical stress or impact.
The problem is prolonged stillness without enough low-level movement throughout the day. Professor Lee said people should stop thinking about exercise only in terms of gym sessions and instead focus more on how regularly they move.
He added: “The body responds very well to small, consistent movement. The issue is not whether somebody runs marathons. The issue is whether the joints are being stimulated often enough to maintain healthy biological function.”




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