| Life event |
In reference to the MeSH term definition for life-change events, yet with some adjustment, life events are conceptualized as singular occurrences (including biological, psychological, social, and environmental), which mark a change in status and therefore require (re)adjustment and effect a change in an individual’s pattern of living [31, 32, 35]. |
| Transition |
Transitions are conceptualized as status passages that temporally exceed the duration of life events. The duration of a transition varies as a function of the degree of (re)adjustment, which is necessary to adapt to a new status. Generally, life events, which imply a change in status, may trigger a transition or occur within the transitioning process itself (depending on an event’s foreseeability) [36, 37]. |
| Physical activity |
Physical activity is generally defined as any bodily movement produced by skeletal muscles resulting in energy expenditure [34] and may occur across various domains and contexts and at different intensities. |
