By Joshua Pate, Bruno Tirotti Saragiotto, and Mark Overton
Many of us have received warnings about our sitting habits throughout our lives. Phrases like “Don’t cross your legs, or you’ll damage your knees,” or “You could get varicose veins,” are common admonitions that often accompany discussions on posture. However, the question arises: Is crossing your legs genuinely harmful to your health?
For the majority of individuals, the answer is likely negative. The act of crossing your legs does not inherently damage your back, lead to wear on your hips or knees, or cause varicose veins. In fact, the more pressing concern for many is remaining in a static position for extended periods, which can lead to stiffness or discomfort, often mistaken for a sign of injury.
Where does this belief stem from? It likely originates from outdated concepts of proper posture that equated “sitting correctly” with traits like discipline and good character. Such notions can easily blur the lines between social conventions and medical truths.
It is also common to misinterpret discomfort as a sign of injury. While sitting cross-legged may cause temporary stiffness or a feeling of compression, this sensation is typically an indication to adjust your position rather than evidence of harm.
This perspective aligns with contemporary views on posture and pain, which dismiss the idea of a single “ideal” sitting posture. When it comes to back health, crossing your legs is often categorized as poor posture that may lead to spinal issues. However, research has not identified a universally ideal sitting position that is beneficial for everyone, nor has it proven that any common sitting posture consistently results in harm.
In a study where physiotherapists from various countries were asked to define the “best sitting posture,” their responses varied significantly. The researchers concluded that perceptions of ideal sitting posture are influenced by both tradition and professional culture, rather than solely on scientific evidence. While posture is indeed important, the human back is robust and versatile, capable of adapting to various positions.
Typically, the primary issue arises from maintaining a single posture for too long, regardless of whether that position is cross-legged, upright, or hunched over a screen.
Another widespread belief is that crossing your legs can lead to the deterioration of hip and knee joints. However, there is scant evidence to support this claim. The forces exerted on your hips and knees during activities like climbing stairs, rising from a chair, running, or jumping are significantly greater than those experienced while sitting cross-legged. Although this position may alter joint angles temporarily, it does not demonstrate a direct link to arthritis or permanent joint damage.
Research specifically examining the long-term effects of sitting cross-legged on joint health is limited, but existing evidence does not back the traditional warnings. Current clinical guidelines emphasize the importance of maintaining joint health through regular physical activity, muscle strength, a healthy body weight, and proper management of overall joint stress, rather than advising against specific sitting positions.
If crossing your legs is comfortable for you, there is little reason to consider it hazardous. If discomfort arises, simply change your position.
Regarding the concern of varicose veins, these occur when the valves within veins fail to function properly, allowing blood to accumulate and causing veins to enlarge. Factors such as age, genetics, pregnancy, obesity, and certain occupational patterns, especially prolonged standing, are more closely linked to the risk of developing varicose veins. While crossing your legs may momentarily affect blood flow, this does not equate to a cause for varicose veins.
There are situations where avoiding crossing your legs may be advisable, typically for specific medical reasons and usually only for a limited time. For instance, post-hip replacement, patients have often been advised against crossing their legs during the healing process. However, recent studies suggest that these precautions may be overly cautious for many patients, and relaxing such restrictions does not significantly raise the risk of early dislocation.
Additionally, there may be instances where a healthcare professional recommends avoiding a position due to temporary discomfort or irritation in a sensitive area. This is quite different from asserting that the position is universally harmful. Many individuals are familiar with the temporary numbness or tingling that can occur after remaining in an awkward position for too long, but these sensations typically resolve quickly upon moving. They serve as reminders to shift positions rather than evidence of damage.
Ultimately, varying your movements is more crucial than striving for perfect posture. The body thrives on diversity in positions. If sitting cross-legged feels good, go ahead; then switch it up. Change your weight distribution, lean back, stand, or take a walk. The healthiest sitting position is often the one you do not maintain for an extended period.
Emphasizing movement and variety in your posture is paramount, and it’s essential to recognize that your body is likely more resilient than you may have been led to believe.
Joshua Pate is a senior lecturer in physiotherapy; Bruno Tirotti Saragiotto is an associate professor and head of physiotherapy; and Mark Overton is a senior lecturer in physiotherapy, all affiliated with the University of Technology Sydney. This article was first published on …
