Abstract
BackgroundProlonged sedentary behaviour is associated with poor health outcomes. Office workers often engage in excessive sedentary behaviour, however limited research reports on how this sedentary behaviour is accumulated. This study examines objectively measured patterns of prolonged sedentary behaviour in female office workers during weekdays and weekend days and across time of day.MethodsFull time female office workers from a Scottish University participated (N = 27 mean age 43.0 ± 11.5 yrs; BMI 25.8 ± 4.1 kg/m2). Participants wore an activPAL™ for 7 days and completed a diary of waking and working hours. Average week and weekend time sitting, standing and stepping was calculated and also expressed as a proportion of waking day. Average week and weekend daily step count and sit to stand transitions were calculated. Continuous bouts of sedentary behaviour were categorised as: 20–40, 40–60 and > 60 minutes and compared between week and weekend days and across time of day.ResultsAverage weekday sitting time and proportion was higher (P < 0.05) than weekend days [9.1 hrs (66%) vs 8.1 hrs (56%)]. Time and proportion spent standing was higher (P < 0.01) at weekends than weekdays [4.6 hrs (32%) vs 3.8 hrs (27%)]. Time spent stepping [weekday 1.8 hrs (12%) vs weekend 1.7 hrs (12%)] and total daily step count (weekday 8903 vs weekend day 8014) were not significanlty different (P > 0.05) on weekdays vs weekend days. The pattern of sedentary behaviour bouts was different between week and weekend days. Week days were dominated by a consistent pattern of shorter (20–40 mins) sedentary behaviour bouts. The longest continuous sedentary behaviour bouts occurred in the evening, particularly at weekends.ConclusionsIn office workers the most prolonged sedentary behaviour occurred in the evening, particularly at weekends. Interventions need to target these highly saturated periods of sedentary behaviour.
Highlights
Sedentary behaviour is characterised as waking activity in a sitting or reclining posture with a resultant energy expenditure of less than 1.5 metabolic equivalents [1]
Office workers often engage in excessive sedentary behaviour, limited research reports on how this sedentary behaviour is accumulated
This study examines objectively measured patterns of prolonged sedentary behaviour in female office workers during weekdays and weekend days and across time of day
Summary
Sedentary behaviour is characterised as waking activity in a sitting or reclining posture with a resultant energy expenditure of less than 1.5 metabolic equivalents [1]. This study examines objectively measured patterns of prolonged sedentary behaviour in female office workers during weekdays and weekend days and across time of day. Average week and weekend time sitting, standing and stepping was calculated and expressed as a proportion of waking day. Continuous bouts of sedentary behaviour were categorised as: 20–40, 40–60 and > 60 minutes and compared between week and weekend days and across time of day. Results: Average weekday sitting time and proportion was higher (P < 0.05) than weekend days [9.1 hrs (66%) vs 8.1 hrs (56%)]. The pattern of sedentary behaviour bouts was different between week and weekend days. Week days were dominated by a consistent pattern of shorter (20–40 mins) sedentary behaviour bouts. Conclusions: In office workers the most prolonged sedentary behaviour occurred in the evening, at weekends. Interventions need to target these highly saturated periods of sedentary behaviour
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