(A) Seat Width (E) Backrest Width

(B) Seat Height (C) Seat Depth (D) Backrest Height

Posture and ErgonomicsA good working posture is one that requires the least amount of static

muscle work with least muscular effort. The more varied the posture the

better. The correct sitting position is the critical first step in minimising

the risk of back pain.

The spine is one of the most delicate parts of the human body. As

demonstrated in (fig. 3), an incorrect sitting position such as slouching

may result in an unhealthy curve of the spine and puts increased pressure

on the soft tissues (muscles, discs and so on).

The first two illustrations (figs. 1 and 2) show the use of an upright sitting

position, used in combination with a correctly positioned computer screen

and keyboard. The lumbar curve is maintained in this way, which helps to

reduce the pressure on the structures of the back.

Adjust The Chair For Maximum HealthAll Posture Collection chairs can be adjusted in many ways to support and

allow movement to reduce the onset of discomfort. here are the key points

to remember when adjusting the chair to ensure a good working posture

is achieved:

• Initially sit at the desk, looking squarely at the computer. You are now

ready to adjust your chair.

• Firstly, adjust the seat height so that your elbows are resting slightly

higher than the desk surface (shoulders relaxed). Your thighs should be

between 90-95 degrees to the upright body. You may require a footrest

if your feet are not comfortably flat on the floor. The top of the display

screen should be approximately at eye level (you may need to raise the

screen) see fig. 1.

• secondly, adjust the seat depth - that is the horizontal part of the chair

seat - so that you can sit firmly against the back pad with a small gap

between the front of the seat pad and the back of your knees.

• Next the height of your backrest should be adjusted to match the small

of the back. To avoid neck and shoulder tension, shoulders should be

relaxed. Additional neck support is generally only required where the

person benefits from leaning back to change their posture and requires

further support. It is rarely used whilst the person is working; more

when they are reclining.

• sitting in your normal working posture, your forearms should rest

slightly higher than the working surface, whether using the keyboard,

the mouse, or paperwork. Armrests are to be used when resting and

encourage you to lean back and take the strain off your upper limbs.

• lastly, release the seat and back locking mechanism so the chair can

move freely. This free movement encourages your muscles to work and

to help your circulation. It greatly helps to reduce discomfort in a

sedentary job.

Ergonomics &Chair Adjustments

56 /

MeasurementsIn order to supply the right chair for each individual user, the correct

measurements must be taken. Use the diagrams and guidelines illustrated

below to specify the correct type of chair. All measurements are in mm

and should be taken with the person in a seated postilion.

A chair that promotes an upright back posture while working at the desk

is encouraged.

Taking User Measurements

(A) seat width

This measurement is taken from the width of the hips at the widest point.

It may be easier to measure the person sat on a chair without arms.

(b) seat height

Measure from the back of the person's knees to the floor. Make sure the

user is in a seated position and the feet are flat on the floor. Ensure their

typical footwear is considered.

(C) seat Depth

Taken from the back of the buttock to the back of the knee. Nb. All Posture

Collection chairs are standard with a seat slide that offers an additional

50mm of depth.

(D) backrest height

whilst sitting upright, measure from the top of the seat pad to the top of

the shoulder (the bony prominence at the outer edge of the shoulder).

A headrest option for additional support is also available on selected

models.

(E) backrest width

sitting upright, measure across the back at the widest point.

Other Important Measurements

(F) Armrest height

This measurement is taken from the top of the seat pad to the underside

of the elbow ensuring their shoulders are relaxed. This will help determine

whether the benefit of adjustable arms is required.

(G) Armrest width

Measured from the inside of the arm pads in both standard and widest

positions. A person exceeding the width of this dimension will not require

adjustable arms.

workstation height/Thickness

Measure the height from the desk surface to the floor.

Nb. Also measure the thickness of the desk and any obstructions.

Fig. 1

Fig. 2

Fig. 3

P

P

O

A

B

C

D

E

The RightMeasures

Code Style Back Mech Arms Finish GP1 GP2 GP3 GP4 GP5 GP6 GP7 GP8 KGP/PR20 Posture Medium Independent 3D Adjustable black 19.4P/PR40 Posture high Independent 3D Adjustable black 20.3P/PR60 Posture Full Independent 3D Adjustable black 21.2

PEXPRO RANGE

P/PR20 P/PR60

Model Examples

Upholstery: Xtreme Plus - Tarot.

Notes: *Measurement taken between arm pads.

Option Code Price

No Adjustable Arms NAA

synchro Mechanism sY

Coccyx Cut Out CO

Memory seat Foam M

silver base P

Polished base C

Cupped Telescopic Armrests (with wrist supports) Ts

Coding Example

Profile Posture high back Chair with synchro, 3D Adjustable Arms & Gel Pads

standard Chair Code: P/PR40

Options:

Coccyx Cut Out (CO)

Memory seat Foam (M)

Ordering Code: P/PR40/CO/M

Standard Features:

• Three back sizes (Medium, high & Full)

• Double Curvature back with Inflatable lumbar

• height Adjustable back

• Choice of Independent & synchro Mechanisms

• seat height Adjustment

• seat Depth Adjustment

• body Tension Adjustment

• 3D Adjustable Arms & Gel Pads (height, width & Depth)

• CMhR Foam

• black Nylon base

• 5cm Twin wheel hooded Castors

Dimensions

Model: P/PR20 P/PR40 P/PR60 - - - - - -

seat width 480 480 480 - - - - - -seat height 450-570 450-570 460-570 - - - - - -seat Depth 420-470 420-470 450-500 - - - - - -back height 390-470 490-570 590-670 - - - - - -Overall width 420 430 490 - - - - - -Arm height 180-280 180-280 180-280 - - - - - -Arm width 440-480* 440-480* 440-480* - - - - - -