The human body is designed to move, and it is also designed to take a load off from time to time by sitting down. But when time spent off your feet by far exceeds your time spent in motion, it can lead to negative consequences that speed up aging and wreck your health.
In today’s age of robotics and technology, occupational culture is shifting rapidly to physically passive work that engages your mind but neglects your body. More and more, people spend their workdays in a seated position for hours on end. We even eat meals at our workstations. Add to that time spent commuting, and “down” time at home as you unwind before bed, and the sum total of time spent daily being physically active shrinks to mere minutes.
Sitting in itself seems harmless enough, and some might even argue that it is safer than, say, operating a jackhammer. But new research reveals that excessive sitting is more toxic than smoking cigarettes, affecting both your body and your mind. Moreover, excessive sitting is becoming globally pandemic, leading toward a worldwide health crisis.
Musculoskeletal Consequences of Occupational Sitting
When standing with perfectly aligned posture, there is minimal stress to the body’s musculoskeletal structures — imagine soldiers standing at attention for hours. But when you deviate from upright posture to sitting for prolonged periods of time, your muscles and joints work overtime.
In a recent study, Baker et al. (2018) wanted to quantify the impact of long-term sitting on participants’ minds and bodies. They found that after two hours of seated computer work, discomfort increased in all areas of the body, particularly in the low back, hips and pelvis. Additionally, they found undesirable changes in low back angle and increased instability in the pelvic region, conditions associated with low back pain.
Inactivity can lead to disability as you age, and increase your risk of falls and injury.
Metabolic Health and Sitting
Physical activity has long been associated with reduced risk of cardiovascular disease (CVD) and all causes of premature death, including hypertension, diabetes and some cancers.
In a recent literature review, Owen et al. (2010) noted that even if adults exercise enough to satisfy physical activity guidelines, prolonged sitting can still undermine metabolic health and increase the risk of early death.
Cognitive Impact of Excessive Sitting
Not only is excessive sitting hard on your body, but it can affect your mind as well, making you less productive at work. The afore-mentioned study by Baker et al. (2018) found that prolonged sitting elicited a decline in creative problem solving.
Another study conducted at UCLA took brain scans of the medial temporal lobes (MTLs) of older adults. The MTL is an area of the brain where new memories are formed. The research team found lack of physical activity to be a significant predictor of MTL thinning, considered to be a precursor to dementia and cognitive decline in adults. They noted that even large amounts of physical activity were insufficient to make up for the negative effects of prolonged sitting.
What You Can Do to Offset Prolonged Sitting