Ergonomics training session for -high volume data entry operators

Transcription

1 Ergonomics training session for -high volume data entry operators

2 Training Objectives 1. Identify the musculoskeletal hazards associated with high data entry (manual handling) work 2. Provide information on best practice workstation set up and office environment to reduce the impact of high data entry work 3. Provide information on best practice work methods to reduce the impact of high data entry work

3 OHS Obligations and responsibilities Providing a healthy and safe work place for everyone means: Complying with OHS Legislation: OHS Act 2004 & OHS Regulations 2007 Having OHS systems in place: A method/system of managing workplace hazards & controlling risks, audited for compliance. Internal reporting systems for incidents, injuries, near misses - Incident reports THEMIS: Dedicated OHS advisory staff to provide support Taking reasonable care, working safely, following procedures, completing training.

4 What is Manual handling?... any activity requiring exertion of human force including Lifting / Lowering Carrying / Holding / Restraining Pushing / Pulling Throwing / Catching / Hitting / Striking Repetitive tasks (packing, picking, sorting, filing, typing, assembly, shelving, writing) Using hand tools, equipment Most tasks we undertake involve some level of force exertion or manual handling. Manual handling in the office can be defined as any task that involves repetitive or sustained forces, movements or postures. *Not all manual handling is hazardous!

5 Most common Office Work injuries WorkSafe Victoria - Injury Hotspots : Office Work Highlights the most common injuries associated with working in an office. Further information: e_hotspot.html

6 What are high volume data injuries? 1. Musculoskeletal disorders (MSD s). These arise from the cumulative effect of regular strain, load, speed, and/or force on the soft tissues of the body. Injuries can affect many parts of the body but typically: Neck and back Shoulders, arms, forearms Wrists, hands, fingers and thumbs 2. Psychological /stress related conditions which can arise from high work loads, deadlines

7 Hazardous manual handling Factors that can increase your risk of injury Duration and frequency (workload) In an office environment undertaking continuous data entry for more than 30 minutes at a time or 2 hours per shift Environment Unsuitable working conditions e.g. Poorly designed workstation, chair Poor light, thermal comfort Inadequate space, clutter Individual factors Stress, anxiety, muscle tension Insufficient rest breaks Poor organisation, planning Poor health and fitness

8 Repetitive or sustained awkward posture, movements, forces Repetitive = More than 2 x per minute or Sustained = More than 60 seconds at a time

9 High data entry evidence Key findings from 22 ergonomic research studies on impact of high data entry on body health reveal: Overwhelmingly periodic brief rest breaks throughout the work day reduce musculoskeletal discomfort Maintaining neutral spine (S shape) enables optimal postural muscle function and minimises mechanical stress Keeping the shoulder and elbow of the mouse hand close to the body reduces the muscle work in the shoulder and neck area

10 How do we manage musculoskeletal injuries? The 4 Steps Identify: hazardous work tasks that you perform 2. Assess: whether the task is risky - i.e. likely to cause an injury 3. Control: eliminate or reduce the risk 4. Review: the control measures to see if they are effective

11 In order to demonstrate the impact of high data entry manual handling on the body, a brief overview of the structure and function of the musculoskeletal system follows: The Musculoskeletal System

12 The Musculoskeletal System The Musculoskeletal System is made up of the: Skeleton/spine Muscles Joints Tendons Ligaments All these are potentially subject to stress at work

13 The spine The spine is configured in an S shape to permit maximum mobility, balance, flexibility and stress absorption. We refer to this as neutral spine. 3 notable spinal curves create the S shape: 1. Neck: curves inwards 2. Middle back: curves outwards 3. Lower back: curves inwards Maintaining these curves (neutral spine ) optimises spine health and function

14 Back health Any deviation away from neutral spine increases the stress and load on the spinal structures The further away from neutral e.g. slouching, bending or twisting, the greater the load Prolonged poor postures can accelerate wear and tear on the spine and the surrounding soft tissues

15 Sitting Postures Bad Posture X Good Posture

16 Back/neck discomfort Back/neck discomfort can occur at a computer workstation because of: Unsuitable physical environment/ equipment/furniture - poor design, dimensions, fit Poor workstation set up and organisation - body trying to adapt and fit to the workstation rather than the workstation fitting the body. Prolonged sitting without regular changes in posture - loads the discs, slows down nutrition to the discs Poor postures - slouching and leaning, places uneven loads and strains on the discs, joints, ligaments and muscles Weak core muscles -spine sloppy not stabilised

17 Muscles The main framework of the body (skeleton) is covered by muscles, whose function is to permit movement, exert power and maintain posture.

18 Muscle work Static muscle work: Occurs when body parts are held stationary and muscles are held static e.g. gripping mouse, phone. Muscles contract-but no movement results. Fatiguing, not sustainable for long periods Dynamic muscle work: Rhythmic action between contracting and relaxing muscles e.g. walking, swinging arms Muscles contract and body parts move More sustainable, more favourable for the body

19 Static muscle work When the muscles are under static load: Blood supply including oxygen and nutrients needed by muscles and soft tissues is restricted. Waste product (lactic acid) which can cause a muscle burning sensation) is not flushed away Fatigue, discomfort and soft tissue damage can eventuate Prolonged computer data entry can involve prolonged static muscle loading.

20 Joints and ligaments Joints and ligaments (like the spine) are subject to extra stress when overloaded, over stretched or when awkward postures are adopted. Joints and ligaments can be best protected by: Maintaining neutral, balanced joint positions Deviation away from neutral amplifies forces on joints and tissues

21 Wrist posture Keeping the wrist neutral and aligned with the arm greatly reduces the stress and strain on all the surrounding soft tissues. Unnatural bent wrist positions can lead to conditions such as carpal tunnel syndrome

22 Tendon health Tendons connect muscles to bone. If the action of pulling the muscle is highly repetitive a tendon can become inflamed and movement can become painful and restricted This is a musculoskeletal disorder often referred to as tendonitis or repetitive strain injury (RSI) It can be associated with high volume mouse or keyboard use particularly if technique is poor Ensuring optimal postures and taking regular stretching breaks greatly lowers the risk of developing tendonitis

23 What is best practice Fitting your workstation to you

24 OR ELSE terrible things may happen!!

25 Desk dimensions and layout Fixed height desks should be mm for most workers Desktop thickness 33mm maximum Desks should be 750 mm minimum deep (front to back) to accommodate monitor/s and focal length Space under the desk for legs should enable: 450mm forward clearance at knee 600mm at feet, & 400mm either side of navel. Office chair should swivel from side to side without obstruction

26 Staff task chair set up Staff task chairs should have adequate adjustability to support an optimal sitting posture The chair should be adjusted so that the: back support is slightly reclined and comfortably fits the lumbar curve about a fist gap should exist between the back support and the seat pan seat pan is approximately horizontal and comfortably accommodates thigh length. When sitting back in the chair there should be 2-3 fingers width between the front edge of the seat and the back of the knee. desk height is approximately in line with the navel footrests are generally required for users under 172cm ( 5 7) sitting at a standard fixed height (720mm) desk

27 Best practice computer seated posture Ears in vertical alignment with shoulders Spine neutral (S shape) Hips slightly higher than knees Feet supported on floor or footrest Shoulders relaxed and symmetrical Elbows slightly higher than wrists Elbows in near vertical alignment with shoulders Wrists neutral (slightly bent up ) Fingers relaxed with joints slightly curled (not stiff)

28 Best practice computer seated posture Elbows should be slightly higher than your wrists when operating keys/mouse The desk should be approx mm high The back support should be at an angle of 90 to 100 and supporting the lumbar curve Hips should be slightly higher than knees Feet should be adequately supported on the floor or by a footrest There should be approximately 2-3 finger width clearance between the front edge of the seat and the back of your knee

29 Desktop items and reach zones Frequently used desktop items should be positioned within comfortable reach to minimise stresses and forces on joints and tissues.

30 Monitor position Directly in front and about arm s reach away Top of the monitor just below seated eye height. If not, raise with a monitor stand. Shelving/fixtures over the desk should not interfere with monitor placement Text should be readable without peering. If not, check and adjust brightness, contrast and font size. Free from glare if not, check office lighting- see lighting section Avoid twisting and bending the neck Scroll the work up to the top of the screen to reduce the need to bend the neck Multifocal wearers may need to angle the bottom of the screen up slightly to avoid tilting the head back

31 More is not better!

32 Best practice set up for two monitors Two monitors used equally Same height and distance away Position as above Swivel chair to view screens don t twist neck Primary and secondary monitors Same height and distance away Primary monitor directly in line with user Secondary monitor to one side Swivel chair to view screen don t twist neck

33 Best practice keyboard position and use The keyboard should be positioned directly in line with the screen Mini keyboards (minus numeric pad) enable a more desirable arm and mouse posture Keyboard feet should be lowered unless high visual control over keyboard is needed Avoid resting wrists on the desk when keying - a wrist rest no higher than the keyboard may help keep the wrist neutral/flat Key strike should be light - keep fingers relaxed, joints soft or curved- not stiff Use keyboard shortcut keys wherever possible: shortcuts.html

34 Keeping the shoulder and elbow in close

35 Keeping the wrist neutral

36 Keeping the wrist neutral

37 Check the mouse fits your hand comfortablycontact with the desk top should be the padded regions of the palm not the wrist. If not, a more suitable size mouse may be required- one size does not fit all Best practice mouse use

38 Best practice mouse use Swap hands - change primary click button settings through the computer control panel Place mouse mat directly next to keyboard elbow should be approximately tennis ball distance from waist Relax shoulder, support forearm on desk, maintain middle finger in line with wrist and elbow Use a whole arm circular movement -avoid repetitive sideways wrist movements.

39 Best practice mouse use Avoid hovering index finger over mouse in readiness to click.take hand off mouse when reading screen X Take hand off mouse ever 5 minutes for 20 seconds and stretch handsopen /shut, shrug shoulders Gel filled mouse rests are not recommended as they promote a poor wrist position and repetitive sideways wrist movement

40 Document holders If you need to transcribe from or refer to documents Neck /shoulder strain can result from twisting & bending the neck to read documents placed on the desk. An adjustable angled document holder is the preferred design and should be placed between keyboard and screen to maintain a neutral, symmetrical neck posture 3M in line model from Lyreco

41 Optimal phone use Place phone unit within comfortable reach. Avoid reaching across the body If there is a requirement to simultaneously speak on the phone and write/use keyboard, a headset or blue tooth device should be used so a symmetrical posture can be maintained- contact IT telephony. Use speaker function if appropriate Never tuck the phone between your shoulder and ear

42 Physical environment Noise should not be at a level which > interferes with communication > is annoying or distracting > affects performance of tasks such as reading and writing Air quality/ flow should not cause discomfort- drafts can be addressed with air vent deflectors Temperature should be comfortable (ambient office temperature C recommended) Thermal comfort varies greatly between individuals and clothing is the most obvious and effective control.

43 Physical environment Lighting Too much or too little light can cause eye strain and poor postures eyes are controlled by muscles The monitor should be placed in a position to minimise glare and/or reflections from light sources Overhead lights or light entering through windows should not be directly in the visual field Light can be controlled with blinds, or modifying artificial lighting: diffusers, removing light tubes Focus on objects at different distances, blink regularly to refresh eyes Take breaks away from computer

44 Rest breaks and stretches Break from sitting every 30 minutes for 1-2 minutes to stretch and mobilise working muscles Take micro pauses of 5-10 seconds every 5 10 minutes to remove hands from the keyboard/ mouse during prolonged periods of data entry Set a timer as a rest break prompt Microsoft Outlook or access free downloadable timers e.g. Take time to perform some stretches When tired, stressed or under time pressure you are more likely to experience elevated muscle tension. Don t skip rest breaks

45 S-t-r-e-t-c-h

46 S-t-r-e-t-c-h

47 Stress A range of stressors exist in our lives, both inside and outside of the work environment - workloads, deadlines, challenging personalities Stress and anxiety can produce muscle tension Tune in to your body; relax, stretch, take some deep breaths and sighs, release physical tension Tune in to your mind. Is your self-talk rational and your attitude positive? More tips on wellbeing and stress management may be viewed at the Counselling and Psychological Services website: s/wellbeing/stress_management

48 Reporting: when, how, where and why WHEN: HOW: WHERE: WHY: Early first advise your supervisor Complete incident report via Themis Self Service (if necessary) Themis Staff Self Service at: - To optimise recovery. - To predict and prevent other incidents/injuries occurring. No-one should be working in discomfort or risking their health and safety. There is always a solution.

49 Where to go for help Supervisor Computer Workstation Ergonomic Self Assessment Checklist at: ecklist.pdf Local OHS Manager UoM OHS & Injury Management website at: Enrol in the Office Ergonomics course at: Officewise - A guide to Health and Safety in the office available at: from home website at:

50 Acknowledgements / References WorkSafe publications Images: Unless indicated, all images are sourced from Microsoft Office Clip Art at: