Prevalence and Risk Factors for Sedentary Behavior Among Malaysian Adults

Background and Context

Sedentary behaviour—characterised by prolonged sitting or reclining with very low energy expenditure—has emerged as an independent risk factor for non-communicable diseases (NCDs), distinct from mere physical inactivity. While the detrimental health consequences of insufficient exercise have been well documented, researchers have increasingly recognised that extended periods of sedentariness carry their own unique metabolic risks, even among individuals who meet recommended physical activity guidelines.

Malaysia has experienced a dramatic epidemiological transition over the past three decades, with NCDs now accounting for the majority of morbidity and mortality. Rapid urbanisation, the growth of sedentary occupations in manufacturing and services, and the proliferation of screen-based leisure activities have collectively reshaped the activity profiles of the Malaysian population. According to broader regional data, Malaysia has been identified as one of the least physically active countries in the world, with over 60 per cent of adults classified as essentially sedentary. Against this backdrop, the present study sought to provide nationally representative estimates of sedentary behaviour prevalence and to identify the sociodemographic and health factors most strongly associated with prolonged sitting time among Malaysian adults.

Study Design and Methods

This study analysed data from the Third National Health and Morbidity Survey (NHMS III), a large-scale cross-sectional nationwide survey conducted in 2006 by the Institute for Public Health, Ministry of Health Malaysia. A total of 33,385 adults aged 18 years and above were recruited through a rigorous multistage stratified sampling design, with the sampling frame provided by the Department of Statistics Malaysia to ensure national representativeness across all states and territories.

Sitting time data were collected using the International Physical Activity Questionnaire (IPAQ), a validated instrument that quantifies the total time spent in sedentary postures during waking hours over the preceding seven-day period. Sedentary behaviour was defined as sitting time exceeding a specified threshold consistent with international classification standards. Information on sociodemographic variables—including age, sex, ethnicity, marital status, educational attainment, and employment status—was gathered through structured face-to-face interviews. Clinical data on self-reported physician-diagnosed diabetes mellitus, hypertension, and dyslipidaemia were also collected. All statistical analyses were performed using SPSS Version 21.0, employing chi-square tests for bivariate associations and multivariable logistic regression to identify independent predictors of sedentary behaviour while controlling for potential confounders.

Key Results

The overall prevalence of sedentary behaviour among Malaysian adults was 23.5 per cent. When examined by sociodemographic subgroups, several significant patterns emerged. Higher proportions of sedentariness were observed among older adults, with the prevalence increasing progressively with age. Adults aged 50 years and above demonstrated the strongest association, with adjusted odds ratios ranging from 1.20 to 2.92 depending on the specific age stratum, after controlling for other variables.

Ethnicity played a notable role: Malaysian Chinese adults had 74 per cent higher odds of being sedentary compared to other ethnic groups (OR = 1.74, 95% CI: 1.58–1.91). Marital status also emerged as a relevant factor, with unmarried individuals showing 19 per cent higher odds of sedentariness (OR = 1.19, 95% CI: 1.08–1.30). Employment status was significant as well—those who were unemployed demonstrated substantially elevated sedentary behaviour, as did respondents without formal education.

The relationship between sedentary behaviour and existing health conditions was particularly notable. Adults with self-reported diabetes, hypertension, and dyslipidaemia each showed significantly higher rates of sedentary behaviour compared to those without these conditions. While the cross-sectional design precludes definitive causal inferences, these associations are consistent with a bidirectional relationship whereby chronic disease both promotes and is exacerbated by prolonged sitting.

Public Health Implications

The finding that nearly one in four Malaysian adults engages in excessive sedentary behaviour carries substantial public health implications. Malaysia’s sedentary prevalence, while lower than some high-income nations, is concerning in the context of the country’s already high NCD burden. The data suggest that Malaysian adults spend approximately 41 per cent of their waking day in a seated position—a figure that has been cited in subsequent public health advocacy and media reporting.

The strong age gradient underscores the need for targeted interventions among older adults, who may face mobility limitations, social isolation, or reduced occupational activity following retirement. The elevated sedentariness among Chinese Malaysians may reflect cultural, occupational, or residential factors that warrant further exploration. The association between unemployment and sedentary behaviour highlights the potential role of structured daily routines and occupational physical demands in maintaining activity levels.

From a policy perspective, these findings support the WHO Global Action Plan on Physical Activity 2018–2030, which calls for a 15 per cent relative reduction in physical inactivity among adults by 2030. For Malaysia specifically, interventions could include workplace health programmes that incorporate standing desks and movement breaks; community-based exercise initiatives targeting older adults and unemployed populations; urban planning that facilitates walking and active transport; and public health campaigns that distinguish between physical inactivity and sedentary behaviour as distinct risk factors requiring different intervention strategies.

Limitations

Several limitations should be considered when interpreting these findings. First, the study relied on self-reported sitting time, which is subject to recall bias and may underestimate actual sedentary behaviour. The IPAQ, while internationally validated, has been shown to have moderate reliability in diverse populations. Second, the cross-sectional design prevents the establishment of temporal or causal relationships between sedentary behaviour and comorbidities. Third, the data were collected in 2006, and subsequent socioeconomic changes, including increased smartphone use and the growth of sedentary occupations in the digital economy, may have further altered sedentary behaviour patterns. Fourth, the study did not account for all potential confounders, such as dietary habits, neighbourhood walkability, or specific occupational demands.

Significance for Malaysian Public Health

This study provides the first nationally representative estimate of sedentary behaviour prevalence among Malaysian adults and identifies key sociodemographic and health factors associated with prolonged sitting. The data have been widely cited in subsequent Malaysian and international research on physical inactivity, and they contributed to evidence-based advocacy for sedentary behaviour reduction policies. As Malaysia continues to grapple with rising NCD rates, understanding and addressing the specific patterns of sedentariness across different population subgroups remains a critical public health priority.