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