1.1c Physiological factors

Physiological factors are connected to Comfort, Discomfort and Biomechanics

Types of physiological factor data available to designers:

•For example, bodily tolerances such as fatigue and comfort.
•muscle strength in different body positions
•endurance in different body positions
•visual acuity
•tolerance to extremes of temperature
•frequency range of human hearing,
•size
•eye/hand coordination

The use of Biomechanics leads to better designed products and specifically sporting goods. They interact better with the user to improve their performance, enjoyment factor and even reduce/prevent injury.

Biomechanics is the sport science field that applies the laws of mechanics and physics to human performance, in order to gain a greater understanding of performance in athletic events through modelling, simulation and measurement.
http://www.topendsports.com/biomechanics/

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Comfort and Fatigue.
The premise for Design for discomfort is to create a situation that provides comfort for only a limited amount of time. This approach has been adopted by airports, fast food chains, shopping malls, supermarkets and bus stations.

The design is to facilitate movement, to avoid loitering and to discourage people resting or stopping for long periods of time. This conversely will encourage movement to retails facilities.

Material choice has a big factor in this approach as well as the design itself. Music has even be used to create an environment or mood of choice.

Comfort: This various between people. For instance the type of bed that a person will choose is determined by the firmness of the mattress.

Fatigue: When people are put under physical or mental stress/activities for extended periods, fatigue can set in. People react differently when they are fatigued. Errors can creep in which then could prove dangerous. Designers need to understand peoples tolerances and design products and environments that help to reduce fatigue.

Designers engineer products to be comfortable, prevent or mitigate injury and enhance human performance. The study of BIOMECHANICS allows this.

This is applied to the entire population; elderly, young, those with disability, biomedical design involves a process called ​DESIGN FOR INCLUSION.

What is Inclusive Design?

Every design decision has the potential to include or exclude customers. Inclusive design emphasizes the contribution that understanding user diversity makes to informing these decisions, and thus to including as many people as possible. User diversity covers variation in capabilities, needs and aspirations.

http://www.inclusivedesigntoolkit.com/whatis/whatis.html
https://abc.2008php.com/tu_shouji.php?id=908515