In the economic sense, an individual's time is split between work and leisure. Leisure is defined as "time not spent working", so any reduction in working hours will increase your leisure hours. Leisure time can be spent doing anything someone desires (chores, exercise, watching tv, reading, hobbies, etc.), it has nothing to do with sleeping or lying in bed.

https://opentextbc.ca/principlesofeconomics/chapter/6-3-labo...