drivers: how we sit in our vehicles
DESCRIPTION
Drivers: How we sit in our vehicles. BY Kim Fulford & Josh Prince S332 Ergonomics. Car Ergonomics. Keeping fatigue low by avoiding stress while driving on long trips Good seat position Good shoulder & leg position Appropriate Arm and Shoulder position. Ergonomics for good road trips. - PowerPoint PPT PresentationTRANSCRIPT
BYKim Fulford & Josh Prince
S332 Ergonomics
Keeping fatigue low by avoiding stress while driving on long trips
Good seat position Good shoulder & leg position Appropriate Arm and Shoulder
position.
http://video.about.com/autorepair/Car-ergonomics-long-trip-mov.--3o.htm
Car-ergonomics-long-trip-mov.--3o.htm
Shoulder impingement Increased load on lower lumbar Sciatic nerve pain (hip impingement) Leg room – lack of Carpal Tunnel symptoms Head and neck pain – no head room Body is subjected to outside forces:
vibration, jerking, no stabilization
JOSH’S WORK TRUCK KIM IN WORK TRUCK
Josh: • Height: 76 in• Seat angle: 105 deg• Shoulder to steering
wheel: 25 in• Elbow to steering
wheel: 12 in• Leg angle: 110 deg• Arm angle: 170 deg
Kim:• Height: 66 in• Seat angle: 105 deg• Shoulder to steering
wheel: 21 in• Elbow to steering
wheel: 14 in• Leg angle: 140 deg• Arm angle: 120 deg
JOSH PERSONAL TRUCK KIM PERSONAL TRUCK
Josh:• Height: 76 in• Seat angle: 100 deg• Shoulder to steering
wheel: 20 in• Elbow to steering
wheel: 13 in• Leg angle: 140 deg• Arm angle: 120 deg
Kim:• Height: 66 in• Seat angle: 110 deg• Shoulder to steering
wheel: 21 in• Elbow to steering
wheel: 14 in• Leg angle: 135 deg• Arm angle: 129 deg
Data from charts p. 36-37
Taken from Kromer & Grandjean p. 36-37 mm converted to inches
MEN WOMEN
Dimension 5th % 50th % 95th % SD 5th % 50th % 95th % SDStature * 64.8 69.0 73.5 2.6 60.1 64.0 68.3 2.5Eye height 60.1 64.2 68.6 2.5 55.7 59.6 63.8 2.4Shoulder height 52.8 56.7 60.8 2.4 48.8 52.4 56.3 2.2Elbow height 39.1 42.2 45.3 1.8 36.4 39.2 42.2 1.7Sitting height 33.6 35.9 38.2 1.4 31.2 33.5 35.8 1.3Knee height 20.2 21.9 23.8 1.1 18.6 20.2 22.0 1.0Hip breadth (sitting) 12.9 14.3 16.2 0.9 13.5 15.0 17.0 1.0
Shoulder - elbow length 13.3 14.5 15.7 0.7 12.1 13.1 14.3 0.6
Elbow - finger length 17.6 14.5 20.6 0.9 15.9 17.4 19.0 0.9
Forward grip reach 27.2 29.5 32.0 1.4 24.8 26.9 29.2 1.3Weight 128.0 172.0 218.0 29.0 86.0 137.0 187.0 31.0 *All numbers have been converted from mm to inches; and kg to pounds
When looking for a new car make sure the seat offer:• Seat distance• Seat height• Seat back rest angle• Lumbar cushion
Change posture often on long drives
“Fitting the Task to the Human”, Fifth edition, 2005, Kroemer and Grandjean
“Car ergonomics for Comfortable Road Trips”, video, www.video.about.com
“Driving Ergonomics”, www.safemotoring.co.uk