GB/T 39223.5-2020Ergonomic requirements for healthy home—Part 5: Mattress (English PDF)

3.1 Mattress body pressure distribution

The pressure distribution between the surface of the mattress and the contact surface of various parts of the human body.

3.2 Peak pressure

The human body lies flat on the mattress, and the maximum pressure generated between the body part and the contact surface.

3.3 Waist to hip pressure ratio

The ratio of the peak pressure at the waist of the human body to the peak pressure at the hip of the human body.

Note. The waist of the human body is between the first lumbar vertebrae to the fifth lumbar vertebra; the human buttocks are between the upper edge of the sacrum and the transverse buttocks.

3.4 user experience

People's feelings and reactions to products, systems, or services that they use or expect to use.

Note 1.User experience includes all the user’s emotional response, trust response, preference response, sensory response, physiological and psychological responses before, during and after use.

Management response, as well as behavior and performance.

Note 2.User experience refers to the brand image, appearance characteristics, functional characteristics, system performance, interactive behavior and auxiliary functions of the interactive system.

Attitudes, skills, and personality characteristics are the result of the comprehensive effects of the internal psychological and physical state, and the use of situations.

Note 3.From the perspective of the realization of the user's personal goals, usability may include the kind of perceptual and emotional content that is very relevant to the user experience. Available

Sexual criteria can be used to evaluate all aspects of the user experience.

[ISO 9241-210.2019, definition 3.15] […]