Chapter 03.3 - The Body and Performance

Question 1

2 reasons to consider body dimensions

Answer 1

1. Certain body dimensions seem to be related to optimal performance in some activities
2. User must fit into space provided, be able to make required reaches or movements.

Question 2

Anthropometry

Answer 2

Studies of body dimensions

Question 3

Designing population

Answer 3

Design for average Person is a mistake. Design for 95% of potential users (remember frequency from Statistics)

Question 4

Kinds of measurement

Answer 4

Static

Functional

Question 5

Three purposes of Measurement

Answer 5

To help in making decisions concerning reach

To help making decisions concerning clearance

Where ranges of dimensions are important

Question 6

Range of movement

Answer 6

Movable joints: hinged joints-fingers; pivot joints-elbow; ball and socket joint - shoulder and hip

Question 7

Aging and gender vs range of movement

Answer 7

Healthy people between 20 and 60 have good mobility.
Arthritis is a common disease after 45 years.
Women exceed men in all joints but the knee
Slender people exceed heavier people

Question 8

Strength

Answer 8

Maximum strength - Late 20’s
Age 40 - 90%
Age 50 - 85%
Age 60 - 80%

Question 9

Resistance levels for controls

Answer 9

Should not require the application of maximum strength.

Low enough - prevent fatigue & discomfort

High enough - prevent inadvertent operation of controls