Human factors and Ergonomics

1. Human factors and ergonomics
Something , somewhere went terribly wrong
Dr. Samaresh Das

2. Ergonomics

3. Ergonomics
o Ergonomics is the science and the art of fitting the
job and the workplace to workers’ needs.
o It is the study of work & way to make jobs / tasks
in a better way
o It is a way to make work easier

4. Why Ergonomics?
To reduce the risk of
•Accidents
•Injury
• Ill health due to poor ergonomics
Reduce Sickness absence / Costs
Increase Performance / Output
Everyone in any organization is at risk and it is not just
“heavy” or “physical” jobs that cause injury
So our aim should be FEEL BETTER ,
WORK SMARTER

5. Assessments……
By assessing all aspects of:
o Individuals and the jobs they perform e.g. Their
physical capabilities, tasks, equipment ,tools and
working environment
oTo design work systems that are safe, flexible,
efficient and productive.

6. Health Issues Associated with
Poor Ergonomics
Back pain / Injuries
Work related
upper limb disorder
Psychological problems (Stress)

7. Musculoskeletal Disorders- MSDs
o Musculoskeletal Disorders affect the muscles, nerves
and tendons. They are:
o Carpal Tunnel Syndrome
o Tendinitis
o Rotator cuff injuries (shoulder problem)
o Epicondylitis (elbow problem)
o Muscle strains and low back pain

8. Back Pain & Injuries
oBending, Twisting, and Lifting
o Incorrect Posture
o Prolonged Sitting and/or Standing
o Slips & Fall
o Exposure to Vibration

9. Work Related Upper Limb Disorders
continued “over use” can lead to permanent damage through:
oRepetitive actions
oFrequent applications of force
oUnnatural postures/positions
oInadequate rest and recovery
oInadequate physical preparation (warming up)

10. Psychological Factors
Person under too much “pressure” may be more at risk at
o Physical / Ergonomic Injury
o Fatigue
o Accidents ( mistakes, inattention, saving time, shortcut’s)
o General ill health (run down / poor condition)
o Substance Abuse

12. The Worker & Ergonomics
Two Basic Objectives
o Match the requirements of a task to the individual
o Optimise the design of the task to the individual to reduce the
risk of injury, ill health and discomfort.
o E.g.: Work stations may need to be adjustable so that they
suit a range of people.

13. The Worker & Ergonomics

14. The Worker
Each worker is unique:
oSize & Shape
o Age and Gender
o Race and Language
o Physical Ability (Health & Fitness)
o Limitations Vulnerabilities, Disabilities, Mental Ability
o Experience
oIt is very difficult to optimise a task or a workplace to suit
everyone

15. People and Comfort….
Different views about
• Temperature
• Ventilation
• Lighting
• Background Noise
• Isolation
• Overcrowding
• Communication
Discomfort will influence how a person will work

16. The Risk of Injury….
o Doing something too frequently without break
o Work in awkward position/ angles
o Workstation is not “fit”
o Working under discomfort and significant pressure

17. Office Ergonomics

18. Office of horrors

19. Ideal Office

20. Good ergonomics

21. Ergonomics

22. o One of the biggest injury risk factors is static posture.
o Try to spend at least 5 minutes /hr hour away from your computer.
o Remember to ONLY stretch to the point of mild tension.
o Try to incorporate the stretches into your daily routine.
o This slide provides some illustrations of simple active stretches to
perform at the office.
Hand Exercises
o Tightly clench your hand into a fist and release, fanning out the
fingers. Repeat 3 times
Good ergonomics

23. Back and Shoulder Exercises
Stand up straight, place your right hand on your left
shoulder and move your head back gently. Do the
same thing for the right shoulder

24. Head and Neck Exercises…
o Move head sideways from left to right and back to
left
o Move head backwards and then forward

25. Stretches…..

26. Stretches Cont……

27. Stretches Cont……

28. Home Ergonomics
oIt is about making home more comfortable, efficient and user-friendly
living space.
oThe ergonomics of home greatly affect body and overall health.

29. Kitchen
oInstall a cushioned mat to stand
o Use oven that is mounted near chest height, eliminating
the need to bend over.
o Choose a refrigerator that has a bottom-mounted freezer,
which reduces the need to bend over when accessing the
main body of the fridge.

30. Living Room
o Furniture should be easy to move
o Avoid couches that are too low and without a proper
lumbar support
o Avoid sitting in front of the television in a position
where neck is maintaining an upward tilt
o When eating in front of the television, place food on a
surface that is high enough to eliminate the need to
bend over to eat.

31. Bedroom
oUse cervical pillow that supports the natural curve of
neck.
o Use products that properly support your neck while
reading or watching television in bed
o Use a mattress that supports your spine

32. Bathroom
oUse bath, floor mats and install hand bars to prevent slips
and falls.
oBathroom sinks and showerheads not be too low

33. Driving Ergonomics

34. Driving Ergonomics

35. For back Support
o Choose a vehicle that sits high - an SUV instead of a
sports car
oEnter the car first by sitting down and then swinging
your legs under the wheel
o To leave your vehicle, slide the car seat back before
swinging your legs out and planting your feet on the
ground.
oLook for cars with automatic transmissions and power
steering.
oUse a lumbar support cushion and add foam wedges to
the seat to elevate pelvis

36. For Neck and shoulder
o Avoid leaning forward when sit in the driver’s seat
o Position the car seat comfortable and not stretching
o Make sure there is sufficient room between head and
the roof of the car

37. Optimal car seat
o Choose a comfortable and supportive seat
o Confirm all adjustment mechanisms are easy to use
o Make sure the seat material does not create discomfort
and all parts of the seat provide adequate support

38. Ergo Driving Break
o To reset spine and alleviate pressure caused by
prolonged sitting, take advantage of red lights or sitting
in traffic by doing some simple stretches
oHolding a steering wheel in awkward postures or too
tightly can cause carpal tunnel syndrome

39. Ergo Checklist

40. Thanks