Arm rests prevent the user from bringing the chair in close enough to the desk to utilise the back support. The user “perches” forwards on the seat to reach the keyboard and is effectively sitting unsupported. With no arms rests to collide with the desk, the ephgrave chair can easily be pulled close to the desk, facilitating use of the back support.
When the seat is too deep, it is often difficult and unwieldy to pull the chair in close enough to the desk. Users therefore position the chair too far back and either “perch” forward on the seat without using the back support, or else bring their bottom forward and then lean back into a slump position as they tire. With a shorter seat, it is easy to pull the ephgrave chair in close enough to the desk to ensure the back support is used.
Do not try to forcefully sit back into the chair. If you try to arch your back as you “sit back”, then your lower back muscles will still be working and you may be gripping through your hips and tipping your pelvis forwards. Try to relax your muscles and allow your body weight to fall backwards from your hips, letting the ephgrave chair do the work for you
Tucking feet under chair:
It is important to let your feet rest on the floor. Tucking your feet back under the chair increases the tension in your quads muscle. This pulls your body weight forward, unbalancing your spine, and causing you to grip with your hips and lower back. Letting your feet rest flat on the floor allows your body weight to move backwards so the pelvis and lower back can relax and let the chair do its work.
Positioning of cushion:
– Too low:
If you position the cushion too low (beneath the keystone vertebra), then the cushion will exaggerate the arch of the lower back and the spine will collapse above it (as in a conventional office chair). Your mid-back will slump and your head and shoulders will fall forward.
– Too high:
If you position the cushion too high (above the keystone vertebra) then it will push the upper body too far forwards and the lower back will collapse down beneath it. It will feel like the chair is pushing you forwards and downwards, encouraging your spine to collapse into a C-shape.
– The impact of changing your sitting position:
The back cushion may initially feel very different to what you are used to. The load through your spine will alter and certain muscles and joints will be gently stretched as your posture improves. Any initial discomfort will quickly wear off as you body adapts.
With a standing desk your spine has no passive support. The brain/body has to work harder to actively keep itself upright and balanced over the feet. Over time, you will shift position and sink down into certain joints as the muscles get fatigued. The ephgrave chair effortlessly keeps the spine aligned, reducing fatigue and freeing your mind to concentrate on the task at hand.
This is because our bodies adapt to the position they are most often in. If you habitually use a chair that allows your upper body to slump, then the muscles around the joints adapt to that position so it feels “normal” and quite comfortable for a short period of time. However, as the joints are poorly aligned, over a period of time they become slowly overloaded and painful – hence the feeling of growing discomfort over the day.
A gym ball gives you an unstable base to sit on with no support for your spine. This is useful in a gym session when you are focussing on training your muscles to support your body correctly. When carrying out desk-based activities, your mind is focussed on these tasks, not on your body. It takes a lot of effort to hold the moveable parts centrally balanced on an unstable base. Your muscles will fatigue and the short, tight dominant muscles will take over as your body tends towards its habitual posture. As these muscles get tired, the spine will collapse down and the overwork will reinforce any muscle imbalances that you may have.
The ephgrave chair supports your keystone ensuring an effortless, balanced sitting posture. With strain and discomfort eliminated, your mind is free to concentrate on work