What 8 Hours of Sitting Is Really Doing to Your Body

For many of us, sitting for eight hours a day has become completely normal. We sit at our desks, in the car, on the train, in meetings and then often on the sofa in the evening. But spending this much time sitting doesn't just make you feel stiff. It can affect your muscles, breathing, circulation and even how you feel mentally.

When you sit for long periods, your hips stay bent and your glutes remain largely inactive, while your lower back and hip muscles can become tight from being held in the same position. Your neck and shoulders can also work surprisingly hard, especially when you're looking at a screen. I see this time and time again with my clients — tight hips, aching lower backs, stiff necks, raised shoulders and headaches are incredibly common in people who spend most of their day at a desk.

Something people don't always think about is breathing. When we're sitting for hours, particularly hunched over a laptop, our ribcage has less freedom to move. Add concentration or stress and we can start taking shorter, shallower breaths without even noticing. You may also find yourself holding your breath while concentrating or clenching your jaw during stressful moments. By the end of the day, these small habits can leave you feeling much more tense than you realise.

Then there's the mental side. Hours of screens, emails, notifications and constant decision-making can leave you mentally exhausted, while your body feels stiff, restless and tense. Sometimes that feeling of “I need to switch off” is your body telling you it needs a change of position, a change of environment and a proper break from the screen.

Even your legs can feel the effects. When you're sitting still for hours, your calf muscles aren't contracting as often to help move blood back up towards the heart, which can contribute to that heavy, sluggish feeling in your legs.

The answer isn't complicated. Get up regularly, walk around while you're on the phone, take a few minutes away from your screen, change your position and, if you can, get outside during your lunch break. Even a short walk gives your eyes, brain, muscles and joints a much-needed change.

And remember, there isn't one perfect posture that you need to hold all day. Your body needs variety. Moving between different positions is often far more helpful than trying to sit perfectly still for hours.