Poor Posture and Pressure on your Spine

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Freddie Mercury was right: we’re under pressure. Nothing can be truer when it comes to your spine. It’s because of simple physics: the pressure or load on your back increases as you move away from a neutral posture. Here are the numbers: Standing straight puts 100mm of pressure on the intervertebral discs of your spine; add a forward bend while flexing or rounding your back and you’ve more than double the pressure, or 220mm. Can you see now why reaching your toes in Uttanasana or any standing forward bend before you’re ready isn’t worth the potential harm to your back?

What poor posture means to the ongoing health of your back?

Over time, poor posture causes the discs between the vertebrae to wear down and lose their ability to cushion and act as shock absorbers. The discs are pushed out towards the back from their normal position which causes bulging or herniated discs. These bulging and worn out discs can cause a more serious problem by increasing the pressure on the spinal nerves and the spinal cord itself. The result is pain in the legs, including sciatica, arms, shoulders, and neck, and problems with muscle innervations, movement patterns and the sensation of temperature, pressure and pain.

These same problems can be worsened when sitting, believe it or not. Sitting, in contrast to standing, actually increases the intradiscal load compared to standing; spinal pressure “sits’ around 140mm pressure. If you slouch (I’m talking to you desk slouchers!), spinal pressure increases to 190mm; add some weight and you’ve put a whopping 275 pounds of pressure on your spine. This is why in certain methods of yoga like Iyengar students learn standing poses before sitting ones as a general rule as they’re considered more advanced.

Sitting for long periods of time can definitely cause back pain or worsen an existing back problem. Sitting is a static posture that increases stress on the entire back, shoulders, arms, and legs, and especially the muscles of the spine. Slouching overstretches spinal ligaments and surrounding structures of the spine and nerves, blood supply is interrupted and the back muscles are overstretched.

The Solution

If you’re not a yogi yet but find yourself slouching or sitting for long periods of time during the day, your yoga can be as simple as doing the following:

  1. Getting up periodically to stand up and take the pressure off your spine

  2. Sit back into your chair so your back is supported. In yoga postures, ground evenly into your support and allow your spine to straighten up

  3. Use a lumbar roll between your lumbar or lower back and your chair. To judge the proper size of the roll, sit back in your chair, place your forearm behind your lower back between it and your chair and lean back. Your forearm is approximately the size of a lumbar roll. This works when driving too.

  4. Move! Joints don’t have much blood flow. Joints get nutrition in and waste out by physical movement. Move freely in your chair instead of sitting still for hours at a time.

For you yogis, body awareness is key to minimizing the pressure on your back. I’m not saying never practice a forward bend or a seated pose but rather know how to practice them safely. Even a seemingly friendly pose like Savasana can do harm. Sure, while lying down you’re at the lowest end of the spinal load spectrum at 25mm. As a teacher, I ask my students to roll to the side before sitting up not simply to avoid feeling dizzy and lightheaded but also to reduce the pressures on the spine. For the record, resting on your side applies 75mm pressure on your back, which is quite a bit less than pulling yourself straight up from lying flat on your back.

So, the take home message is: do the work in other poses which don’t load the spine first to lengthen your leg muscles and hamstrings, and strengthen your back before you throw yourself into a forward bend. Realize which types of poses are right for you. Gentle flexion of the spine isn’t for everybody and that’s ok. Once your body is ready, you’ll be reaping the benefits of practicing Uttanasana instead of causing harm to our back.



Standing Tall: Why Posture Matters

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Remember how your mom used to always lecture you to stand up straight? Well, she might have made some mistakes over the years (that outfit in your 5th grade school picture), but on this one, she’s right. Posture matters more than you may think.

First, let’s talk about your body, starting at the top. Each inch your head is forward of your shoulders doubles the amount of weight it puts on the rest of your body. Although the average head only weighs between 8-10 pounds, your upper back (and then lower back and hips) will become misaligned if your head “lives” in a forward position – all in an attempt to balance your now-too-heavy head.

And, unless you sit in an ergonomically perfect workstation, chances are you round forward over your keyboard or laptop like something straight out of the latest episode of the “Walking Dead.” Most of us, sadly, are in the process of developing this posture. Blame the Internet (we’re talking to you, Mark Zuckerberg) or your boss (for making you work too much).

What happens to our bodies? Back pain, neck pain, hip pain and knee pain. And, let’s not forget your breathing. Collapsing forward compresses your lungs, reducing their capacity by 30 percent or more. Your organs can’t function properly, and neither can your muscles, joints, or connective tissue.

Posture also matters for your mental health. Good posture allows you to breathe more fully, calming your nervous system, which can help with everything from good sleep to good moods. Plus, standing up tall makes you feel more confident. Slouching pulls your energy downward, even making walking and balance more difficult.

What to do? First, analyze your own posture. Do your shoulders slouch? Is your head forward? Do you have back or neck pain? When you walk do you have a tendency to lean forward and feel like you’re lifting your knees towards you?

Since it is vital to have extension in the upper torso in standing posture, the starting place is simply awareness of how you’re standing or sitting. Imagine lifting out of your pelvis, shoulders back, head looking slightly above the horizon.

Don’t spend too much time sitting at your desk, especially in bad posture. Take a walk. Inhale your arms overhead and slightly back. Regularly engage your lower trapezius to draw your shoulders away from your ears, and your rhomboids to draw your shoulders together.

And balance the forward posture with a lot of back bends. Stretch your pecs and anterior shoulder muscles with anahatasana pose (think child’s pose with your hips over your heels, reaching your tailbone and chest away from each other). Camel pose has been called the “antidote to sitting” because it stretches the entire front of your body.

If you have access to a Pilates reformer, you’re in luck. Do seated arm circles to take your shoulders through a weighted stretch, and turn around for chest expansion to, well, expand your chest and your lung capacity. Or just lie down on a mat, extending arms and legs long on the floor, and lift up, fluttering arms and legs in opposition while breathing deeply.

Most importantly, throughout your day, remember to stand up straight. Don’t slouch. Just listen to mom on this one. You can still argue about your clothes, your politics, and what’s for dinner. On posture, she’s right.

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