What's the best posture at the desk?
Updated: 5 days ago
How to get the right posture at the desk is the most common question of my clients who have a desk job.
So this post has been inspired both by the request of my patients and an article about the Neutral Body Posture ( NBP ) created by NASA ( National Aeronautics and Space Administration ) in the 1980 from measurements of 12 people in the microgravity environment onboard Skylab, today utilized to produce comfortable car seats ( https://spinoff.nasa.gov/Spinoff2013/t_4.html ).
The photo above shows that the body automatically entered into a particular posture with certain angles made by the joints and certain position assumed by the limbs when crew members were physically relaxed in the microgravity condition of the space.
Even if there are different variables like muscle conditions ( hypertrophy ) or spinals condition and the presence of the full gravity, this could be considered a good position to assume to get less stress for joints, limbs and muscles.
I have experimented that a simple way to reach a similar position of hip, legs and spine at desk is to seat on a gym ball as show from the photo below.
A little support can be added under the heel to reach their right angle.
This particular posture can be reached easily with some Sweden Chair too that It generally adds the chest support.
One aspect that I consider to modify is the head position as It is influenced a lot from the full gravity on the earth.
The NBP assumed in the microgravity the head is inclined of 24° respect to the body-centered vertical reference that, as I’ll show you later, increases a lot the head weight.
Since the head's center of gravity is located a few centimetres in front of the Atlas ( Head Joint ), the neck muscles are forced to work isometrically to support the head (Fm).
When there is an inclination of the head forward the weight of the head increases because the arm of the mg Force, which the head is subjected to due to the force of gravity, increases.
In this condition of inclination the neck muscles are forced to work a lot more to support the head ( FM ).
So when the head is inclined for long time, you can get easier neck stiffness or neck muscles inflammation.
It’s very important the head position when we are working at desk or looking at our phone.
The photo below shows how the head weight changes with its inclination forward when we look at our phone or whatever other screen.
The normal weight of the head is around 5 kg that can increase by 5 times with an inclination forward of 60°!!!
I strongly advice you do not incline to much the head both when you look at the desk screen and at the mobile phone.
The simplest way to get the right posture of the head It is positioning the screen both of your PC and mobile phone on the line of your sight with 0 degrees inclination of your head.
Anyway even if you get the best posture at the desk if you stay in that position for long time, It's very stressful for your muscle and joints.
So I strongly advice you get a little rest of few minutes every hour.
In summary, these are the things to keep in mind to have an ideal posture at the desk:
0 Degrees of the head's inclination.
125°-130° Degrees of inclination between chest and legs.
130°-140° Degrees of the knees' angle.
120°-130° Degrees of the elbows.
Screens at the sight level.
Little rest every hour of sitting at the desk.