Cross-sectional associations of housework with cognitive, physical and sensorimotor functions in younger and older community-dwelling adults: the Yishun Study

<p><b>Objectives: </b>Regular moderate-to-vigorous intensity recreational physical activity (PA) improves physical and cognitive functions. However, the age-associated relationships between non-recreational PA with functional ability remain less explored. We examined the associations between housework and functional health among younger and older Singaporean community-dwelling adults.</p><p><b>Design: </b>Cross-sectional study</p><p><b>Setting and Participants: </b>Younger (<65yrs, <i>n</i>=249) and older (≥65yrs, <i>n</i>=240) community-dwelling adults were randomly recruited from a large residential town in Singapore.</p><p><b>Outcome measures: </b>Physical function was assessed using Short Physical Performance Battery, repeated-chair-sit-to-stand and gait speed. Cognitive and sensorimotor functions were assessed using Repeatable Battery for the Assessment of Neuropsychological Status (RBANS) and Physiological Profile Assessment (PPA) respectively. </p><p><b>Methods:</b> Light (LH) and heavy housework (HH), recreational, occupational, and transport-related PA were assessed using PA questionnaires. Participants were dichotomised into low- and high-volume LH and HH groups. Results were adjusted for level of recreational and other non-recreational PA.</p><p><b>Results: </b>Among older but not younger adults, RBANS scores were 8% and 5% higher in high HH and LH groups compared with low HH and LH groups respectively (<i>p</i>=0·012 and <i>p</i>=0·016). Specifically, HH was associated with 14% higher attention score (<i>p</i>=0·014), and LH with 12% and 8% higher immediate and delayed memory scores respectively (<i>p</i><0·001 and <i>p</i>=0·004). In older adults, sit-to-stand-time and PPA scores were 8% and 23% lower in high HH than low HH group respectively (<i>p</i>=0·011 and <i>p</i>=0·040). SPPB and gait speed did not differ with age or HH. LH was not associated with physical or sensorimotor function. </p><p><b>Conclusions: </b>Among older adults, housework is associated with higher cognitive function, specifically in attention and memory. Associations between housework with physical and sensorimotor performance were intensity-dependent. Housework PA is positively associated with functional health among community-dwelling older adults, independent of recreation and other non-recreational physical activities. </p>