16/06/2026
Most people know that sitting too much can make them feel stiff or uncomfortable.
What many don’t realise is that prolonged sitting can affect much deeper structures—including your spinal discs, the small muscles that support your spine, and even the parts of your brain that help control and protect movement.
Your Discs Need Movement - The discs between the bones of your spine act as shock absorbers and help your back move smoothly.
Unlike many tissues in the body, spinal discs have a limited blood supply. They rely heavily on regular movement to help exchange fluids and nutrients.
Walking, bending, reaching and changing positions create a natural pumping action that helps keep discs healthy. When we spend long periods sitting with very little movement, this process is reduced.
One day of sitting won’t harm your spine, but years of prolonged inactivity can contribute to a spine that is less adaptable and less resilient.
The Deep Spine Muscles Can Switch Off - Most people are familiar with the larger muscles of the back and abdomen. However, there is also a group of smaller muscles located close to the spine.
These deep muscles act like the spine’s support team, making constant adjustments to help control and stabilise movement.
Research shows that prolonged inactivity, pain and reduced movement can cause these muscles to become smaller, weaker, or less active.
When this happens, larger muscles often try to compensate. This can contribute to feelings of stiffness, fatigue, tightness, and reduced confidence in movement.
Your Brain Is Always Monitoring Your Spine - Your brain receives a constant stream of information from the joints, muscles and ligaments throughout your spine.
It uses this information to create an internal map of where your body is and how it is moving.
When movement becomes limited for long periods, the quality of this information can decline. In response, the brain may increase protective muscle tension or restrict movement around the area.
Often, the body isn’t damaged—it has simply become more protective.
Read more here: https://www.surestarthealth.com.au/why-sitting-all-day-is-harder-on-your-body-than-you-think/
