Sedentary Behaviour
Prolonged sitting or reclining with low energy expenditure, which independently increases the risk of weight gain.
Plain English
Patient-Friendly Explanation
Sedentary behaviour means spending long periods sitting or lying down while awake — such as working at a desk, watching television, or driving. Even if you exercise regularly, too much sitting can negatively affect your metabolism and contribute to weight gain over time.
Medical
Clinical Definition
Sedentary behaviour is defined as any waking behaviour characterised by energy expenditure ≤1.5 metabolic equivalents (METs) while in a sitting, reclining, or lying posture. It is distinct from physical inactivity — an individual can meet physical activity guidelines yet still be highly sedentary. Prolonged sedentary time is independently associated with increased all-cause mortality, cardiovascular disease, type 2 diabetes, and obesity, mediated in part by reduced lipoprotein lipase activity and impaired glucose uptake.
Key Insight
Why It Matters
Breaking up sedentary time with short movement breaks — even standing or walking for 2 minutes every 30 minutes — has measurable metabolic benefits. Dr Joseph Wang emphasises that sustainable weight management combines both structured exercise and reducing daily sitting time.
Sources
Reviewed against standard medical references.
Medically reviewed by
Family Physician & Registered Acupuncturist, Accord Medical Clinic. MBBS (NUS), Graduate Diploma in Family Medicine (NUS), Graduate Diploma in Acupuncture (Singapore College of TCM).
Last reviewed: August 2026
This page is general health education, not medical advice. Whether any treatment is appropriate for you is a decision made in consultation after assessment.