Leisure, or free time, is time spent away from business, work, and domestic chores. It also excludes time spent on necessary activities such as eating, sleeping and, where it is compulsory, education.
The distinction between leisure and unavoidable activities is not a rigidly defined one, e.g. people sometimes do work-oriented tasks for pleasure as well as for long-term utility. A distinction may also be drawn between free time and leisure. For example, Situationist International maintains that free time is illusory and rarely free; economic and social forces appropriate free time from the individual and sell it back to them as the commodity known as "leisure". Certainly most people's leisure activities are not a completely free choice, and may be constrained by social pressures, e.g. people may be coerced into spending time gardening by the need to keep up with the standard of neighbouring gardens.
Leisure studies is the academic discipline concerned with the study and analysis of leisure.
The supine position (pron.: //) is a position of the body: lying down with the face up, as opposed to the prone position, which is face down, sometimes with the hands behind the head or neck. When used in surgical procedures, it allows access to the peritoneal, thoracic and pericardial regions; as well as the head, neck and extremities.
Using terms defined in the anatomical position, the dorsal side is down, and the ventral side is up.
In scientific literature "semi-supine" commonly refers to positions where the upper body is tilted (at 45° or variations) and not horizontal. In the Alexander technique semi-supine position, the knees are raised bent upward while the soles of the feet and the upper body remain in contact with the horizontal surface.