What sitting all day does to your body, and the easy fixes

Over a single working day, long sitting mostly shows up as stiffness and low energy: a tight lower back and hips by mid-afternoon, a neck that has spent hours drifting toward the screen, heavy legs, and a flat, sluggish feeling that coffee doesn't quite fix. Over years, large studies link a lot of daily sitting with higher risks of type 2 diabetes, heart disease and dying earlier, although that research shows links rather than proof.

Exercise after work helps a great deal, but for most people it doesn't fully make up for a day spent in a chair. The easy fixes are about the day itself: get up about once an hour, move a little in the gaps, and keep the evening workout as well.

Over one working day

Stiffness

Sitting holds your body in one shape for hours: hips bent, knees bent, back rounding a little more as the day goes on, head edging forward toward the screen. Usually nothing is wrong, but muscles and joints that stay in one position tend to feel stiff when you finally move, which is why the first few steps after a long meeting feel creaky. Most people notice it in the lower back, the hips and the neck.

Heavy legs

When you walk, your calf muscles help push blood back up from your legs. When you sit still, they barely work, and some people find their feet and ankles feel puffy or heavy by the end of a long day. A few minutes of walking, or a set of heel raises, gets them going again.

If one leg becomes swollen, painful, warm or red, especially after a long spell without moving, see a doctor promptly rather than waiting for it to pass.

Flat energy

Many people feel duller the longer they sit and brighter after even a short walk. Some small studies that break up sitting with short walks have found people report more energy and less tiredness afterward, though the effects vary from person to person. A few minutes on your feet is one of the more dependable ways through the mid-afternoon fog.

Blood sugar after meals

Your leg muscles are among the body's biggest users of sugar from the blood. When they stay still for hours, the rise in blood sugar after a meal tends to be higher. Lab studies have found that getting up for a couple of minutes of light walking every 20 or 30 minutes makes that rise smaller. You don't feel this one directly, but it is part of why researchers think the way you sit matters, not just how long.

The longer-term picture

Big studies that follow large numbers of people for years have linked high daily sitting time, and long hours of watching TV in particular, with higher risks of type 2 diabetes, heart disease and dying earlier.

These are observational studies, which means they show an association. People who sit a lot may also differ in diet, sleep, work and health to begin with. Researchers adjust for what they can measure, but they can't rule everything out. The lab findings above make the link plausible, which is part of why health bodies such as the World Health Organization now advise adults to limit the time they spend sitting.

You may have heard that sitting is the new smoking. It is a catchy line, but researchers who have compared the two point out that it goes too far. The risks linked to long sitting are real and much smaller than those of smoking, and unlike smoking, the fix is easy and fairly pleasant.

Why a workout after work is not the whole answer

Regular exercise still matters a great deal. The WHO suggests 150 to 300 minutes of moderate activity a week, such as brisk walking or cycling, and active people tend to be healthier than inactive ones, however much they sit.

There is good news on how far exercise can go, too. One large analysis that pooled studies of more than a million adults found that high levels of moderate activity, around an hour a day, appeared to remove most of the extra risk of early death linked to sitting a lot. But an hour a day is far more than most people do. The usual guideline works out to roughly 20 to 45 minutes a day, and the WHO itself says that people who sit a lot should aim for more than the minimum.

There is also the day itself. A run at 6 PM doesn't help the back that was stiff at 3 PM, the blood sugar after lunch, or the fog in the middle of the afternoon. Those happen during the working day, so that is where they get fixed. Researchers even have a name for someone who exercises well and then sits for nearly every other waking hour: an active couch potato.

So the answer is both. Keep the workout, and break up the sitting.

The easy fixes

None of these are exercise in the gym sense. They are small and a bit unglamorous, and they work because they are easy to repeat.

1. Get up about once an hour. Two to five minutes is enough: refill your water, take the stairs, walk to another room. How often should you get up from your desk has a rhythm that fits a real day.
2. Change position more often. Every 20 or 30 minutes, shift something: sit back, stand to read a document, stretch your arms overhead.
3. Stand or walk for some calls. Audio-only calls work well on foot, and a counter or a shelf makes a fine standing desk for listening.
4. Walk after lunch. Ten easy minutes outside, which also gets you daylight. There is more in why a short walk after lunch makes the afternoon easier.
5. Stretch the parts that stiffen. Hips, calves, upper back and neck. Two-minute desk stretches has steps for each.
6. Let the room make you move. Use a smaller glass, keep the printer and the bin a short walk away, and take the stairs. If you have a standing desk, use it in spells rather than all day.
7. Count light movement. It doesn't have to make you sweat. A walk to the kitchen counts.

If sitting or getting up causes pain that doesn't settle, or you have a condition that limits how you can move, ask a doctor or a physiotherapist what suits you.

Where Notchpals fits

The hard part of all this is noticing. Hours vanish when you are absorbed, and by the time you realize how long you have been sitting, it is mid-afternoon. The Movement characters in Notchpals do the noticing for you.

Whichever Movement character you pick brings three moments. The one that matters most on a sitting-heavy day is Stand up: after 55 minutes at the Mac without a break, any time from 8 AM to 10 PM, the character slides down out of the notch and tells you to get up. Stretch visits come now and then, drawn from the same daily allowance as the rest of the crew's repeating reminders. And once a day, somewhere between 1:30 and 3:30 PM, there is a Short walk, which is about when the afternoon fog rolls in.

Coach FlexAlmost an hour in that chair?! Your legs are filing a complaint! UP!

Those 55 minutes only count time you are actually at the Mac. If the keyboard and mouse sit untouched for two minutes, you count as away, so a coffee run or a phone call in the hallway doesn't add to the total. Press Done once you're on your feet. Later gives you 20 minutes to finish what you're doing, then the character asks one more time, and a second Later lets it go. Notchpals has no way of telling whether you actually stood. It takes your word for it, and your lower back keeps its own score.