BackgroundMost studies on day-to-day patterns of physical behaviours (i.e. physical activities and sedentary behaviour) are based on adult populations of high socioeconomic status (SES) and without differentiating between work and leisure time. Thus, we aimed to characterise the day-to-day leisure time physical behaviours patterns among low SES adults and investigate if a day of the week, workday, work duration, and work physical behaviours influence these leisure-time patterns.MethodsThis cross-sectional study included 1012 adults from typical low SES occupations (e.g. manufacturing, cleaning and transportation). The participants wore accelerometers for 1-7 days to measure daily physical behaviours during work and leisure time, expressed as 3-part time-use compositions consisting of time spent 1) sedentary, 2) standing or 3) being active (i.e. walking, running, stair climbing, or cycling). Multivariate multilevel log-ratio models were used to regress leisure time-use composition on day-of-week and the interaction between day-of-week and (1) type of day, (i.e., work/non-work), (3) work duration, and (4) work time-use composition. Models were adjusted for sex, age, BMI, and smoking-status. ResultsOver the course of a week, the workers were primarily sedentary during leisure time, while spending most work time standing or being active. Leisure time physical behaviours were associated with type of day (p < 0.005, more sedentary on workdays vs. non-workdays), day-of-week (p < 0.005, more sedentary on Friday, Saturday and Sunday), standing work (p < 0.005, more sedentary and less active leisure time on Sunday), active work (p < 0.005, less sedentary and more active leisure time on Sunday), and work duration (p < 0.005, less active leisure time on Friday). ConclusionsOur findings suggest that while low SES adults’ leisure time is mostly sedentary, their work time is predominantly standing or active. Leisure time was spent more sedentary on workdays compared to non-workdays, indicating that work factors influenced day-to-day leisure time behaviours. Accordingly, work physical behaviours and work duration were differently associated with leisure time physical behaviours. Our findings support the value of considering the influence of work factors when planning strategies aiming to increase health-enhancing leisure time activities among low SES adults.