What Happens When We Stop Moving?
There was a time when sitting down usually meant we’d spent the last few hours doing something active.
Walking to the shops.
Working in the garden.
Cleaning the house.
Looking after children.
Today many of us sit to work, sit to drive, sit to eat, sit to relax and then sit to watch television.
Our bodies haven’t changed.
Our lifestyles have.
Your Body Was Designed to Keep Moving
Your circulation has two jobs.
Your heart pumps blood around your body.
Your lymphatic system quietly collects excess fluid, proteins and waste products from your tissues before returning them to your bloodstream.
Here’s the clever bit.
Unlike your heart, the lymphatic system doesn’t have its own central pump.
Instead, it relies on many different helpers working together.
Every step.
Every calf muscle contraction.
Every change in position.
Your muscles, your breathing and even gravity all influence how easily blood and lymph move around your body.
When we stop moving…
everything slows down.
What Happens When We Sit?
When we remain in the same position for long periods, gravity gradually begins to win.
Blood can collect more easily in the lower legs.
The calf muscles stop squeezing the deep veins.
The lymphatic system loses one of its biggest helpers.
Fluid can slowly build around the ankles and feet.
You might notice:
- tight shoes later in the day
- sock marks around your ankles
- heavy, tired legs
- stiffness when you stand up
- swollen feet after travelling.
Many people assume this is simply part of getting older.
Often it’s your body asking for movement.
It’s Not Just About Swelling
One of the fascinating things researchers have discovered is that prolonged sitting affects far more than our circulation.
Within just a few hours of uninterrupted sitting, blood flow through the legs begins to reduce, blood vessels don’t work quite as efficiently and muscles become less active. Our metabolism also slows, making it harder for the body to regulate blood sugar and fats in the bloodstream.
The body simply works better when it moves regularly.
The encouraging news?
You don’t need an hour in the gym.
Your body responds remarkably well to frequent movement.
Your Diaphragm Is Helping Too
Most people have heard me talk about the calf muscles being our “second heart.”
But they don’t work alone.
Every deep breath changes the pressure inside your chest and abdomen.
These gentle pressure changes help encourage blood and lymph to move upwards towards the heart.
Now think about how many of us sit.
Head forwards.
Rounded shoulders.
Collapsed through the chest.
When we stay in that position for hours, we often breathe more shallowly as well.
So we’ve reduced two of our biggest helpers at the same time:
less calf muscle activity…
and less diaphragmatic movement.
It’s another reminder that movement, posture and breathing are all part of the same conversation.
Is Putting Your Feet Up Enough?
Many people are advised to “put your feet up” if their ankles swell.
That can certainly help.
But there’s an important difference between sitting upright in a chair with your feet resting on another chair and lying down so your body is fully supported.
When we’re sitting upright, gravity is still influencing how fluid is distributed throughout the body. The hips remain bent and the tissues around the groin stay in a flexed position. Although the lymphatic system is wonderfully adaptable, this isn’t always the most favourable position for encouraging fluid to return from the legs.
When we lie down, things change.
Gravity has far less influence on fluid distribution.
Blood and lymph no longer have to work against the same vertical column.
This is one reason many people notice that swollen ankles are at their smallest first thing in the morning after a night’s sleep and gradually increase again as the day progresses.
If your legs feel heavy after a long day, a short period lying comfortably, combined with some deep breathing, gentle ankle movements and then a short walk afterwards, is often more effective than simply sitting with your feet raised.
It’s another example of how the body responds best to movement and variety, rather than staying in one position.
Little and Often Wins
Many people believe they need an hour in the gym.
Your body isn’t keeping score.
It simply enjoys being reminded to move.
Stand up while the kettle boils.
Walk during a phone call.
Stretch your ankles before getting back in the car.
Take the stairs.
March on the spot while brushing your teeth.
Research consistently shows that breaking up long periods of sitting with just a couple of minutes of light movement improves blood flow, vascular function and blood sugar regulation.
Sometimes the smallest interruptions make the biggest difference.
What About Age?
As we get older we naturally lose muscle mass and strength, a process called sarcopenia.
If our calf muscles become weaker, they can’t help pump blood and lymph quite as effectively.
Add more sitting into the mix and it’s easy to understand why swelling, aching legs and reduced mobility become more common as we age.
The encouraging news is that muscles remain wonderfully adaptable throughout life.
Every walk matters.
Every sit-to-stand matters.
Every heel raise matters.
Movement is never wasted.
Fi’s Clinical Pearl
One of the questions I hear most often is,
“Why do my ankles swell more now than they used to?”
Sometimes there is an underlying medical reason that needs investigating.
But very often life has simply become less active.
Perhaps you’ve retired.
Started working from home.
Been recovering from illness.
Lost confidence.
Or found yourself sitting more without really noticing.
The body notices too.
Fortunately, it also notices when we begin moving again.
Freedom to Move
I don’t want anyone reading this to think sitting is the enemy.
Rest matters.
Recovery matters.
Sometimes lying down is exactly what your body needs.
The problem isn’t sitting.
It’s staying still for too long.
Perhaps that’s the biggest difference between modern life and the lives our bodies evolved for.
Our ancestors didn’t exercise.
They simply moved.
They squatted.
Reached.
Carried.
Walked.
Climbed.
Changed position hundreds of times each day.
Maybe our goal isn’t to exercise more.
Maybe it’s simply to move more often.
Your circulation, your muscles and your lymphatic system will quietly thank you for it.
Further Reading
- Dunstan DW et al. Breaking up prolonged sitting reduces postprandial glucose and insulin responses. Diabetes Care (2012).
- Thosar SS et al. Effect of prolonged sitting and breaks in sitting on endothelial function. Experimental Physiology (2015).
- World Health Organization. Guidelines on Physical Activity and Sedentary Behaviour (2020).
- Mortimer PS & Rockson SG. New developments in clinical aspects of lymphatic disease. Journal of Clinical Investigation (2014). (Excellent overview of lymphatic physiology.)
- Levick JR & Michel CC. Microvascular Fluid Exchange and the Revised Starling Principle. (Helpful background explaining why body position influences fluid distribution.)
Happy Legs ThoughtÂ
Your body doesn’t ask for perfect movement. It simply asks not to be forgotten. Stand up. Take a few steps. Breathe deeply. Your legs will thank you for it.If you would like more information or want information on treatments or movement sessions I offer – please get in touch.