The benefits of good posture - Murat Dalkilinç

16,004,883 views ・ 2015-07-30

TED-Ed


Please double-click on the English subtitles below to play the video.

00:07
Has anyone ever told you, "Stand up straight!"
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or scolded you for slouching at a family dinner?
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Comments like that might be annoying, but they're not wrong.
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Your posture, the way you hold your body when you're sitting or standing,
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is the foundation for every movement your body makes,
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and can determine how well your body adapts to the stresses on it.
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These stresses can be things like carrying weight,
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or sitting in an awkward position.
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And the big one we all experience all day every day: gravity.
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If your posture isn't optimal,
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your muscles have to work harder to keep you upright and balanced.
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Some muscles will become tight and inflexbile.
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Others will be inhibited.
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Over time, these dysfunctional adaptations
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impair your body's ability to deal with the forces on it.
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Poor posture inflicts extra wear and tear on your joints and ligaments,
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increases the likelihood of accidents,
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and makes some organs, like your lungs, less efficient.
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Researchers have linked poor posture to scoliosis,
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tension headaches,
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and back pain,
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though it isn't the exclusive cause of any of them.
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Posture can even influence your emotional state
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and your sensitivity to pain.
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So there are a lot of reasons to aim for good posture.
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But it's getting harder these days.
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Sitting in an awkward position for a long time can promote poor posture,
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and so can using computers or mobile devices,
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which encourage you to look downward.
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Many studies suggest that, on average, posture is getting worse.
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So what does good posture look like?
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When you look at the spine from the front or the back,
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all 33 vertebrae should appear stacked in a straight line.
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From the side, the spine should have three curves:
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one at your neck, one at your shoulders, and one at the small of your back.
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You aren't born with this s-shaped spine.
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Babies' spines just have one curve like a "c."
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The other curves usually develop by 12-18 months
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as the muscles strengthen.
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These curves help us stay upright and absorb some of the stress
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from activities like walking and jumping.
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If they are aligned properly,
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when you're standing up,
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you should be able to draw a straight line
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from a point just in front of your shoulders,
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to behind your hip,
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to the front of your knee,
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to a few inches in front of your ankle.
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This keeps your center of gravity directly over your base of support,
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which allows you to move efficiently
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with the least amount of fatigue and muscle strain.
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If you're sitting, your neck should be vertical,
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not tilted forward.
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Your shoulders should be relaxed with your arms close to your trunk.
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Your knees should be at a right angle with your feet flat on the floor.
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But what if your posture isn't that great?
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Try redesigning your environment.
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Adjust your screen so it's at or slightly below eyelevel.
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Make sure all parts of your body,
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like your elbows and wrists, are supported,
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using ergonomic aids if you need to.
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Try sleeping on your side with your neck supported
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and with a pillow between your legs.
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Wear shoes with low heels and good arch support,
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and use a headset for phone calls.
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It's also not enough to just have good posture.
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Keeping your muscles and joints moving is extremely important.
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In fact, being stationary for long periods with good posture
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can be worse than regular movement with bad posture.
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When you do move, move smartly.
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Keep anything you're carrying close to your body.
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Backpacks should be in contact with your back carried symetrically.
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If you sit a lot, get up and move around on occassion,
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and be sure to exercise.
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Using your muscles will keep them strong enough to support you effectively,
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on top of all the other benefits to your joints, bones, brain and heart.
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And if you're really worried, check with a physical therapist,
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because yes, you really should stand up straight.
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