Accelerometer-Determined Physical Activity and Sarcopenic Obesity Risk in Older European Men and Women

Sarcopenic obesity (SO) is characterized by the presence of both obesity and sarcopenia and is related to disability and loss of independence in older adults. The extent to which time spent in light physical activity (LPA), or moderate-to-vigorous physical activity (MVPA) is associated with SO risk in older adults remains unclear. The aim of this study was (a) to examine the association between the level of adherence to recommended amounts of MVPA and the risk of SO in older adults and (b) to determine whether time spent in LPA is associated with SO risk independently of time spent in MVPA.

This cross-sectional study involved 862 community-dwelling older adults (58% women; aged 65-79 years) from four European countries. Accelerometer-determined time in MVPA was categorized as follows: inactive (< 75 min/week), moderately active (75-149 min/week), active (150-299 min/week) and highly active (≥ 300 min/week). Time in LPA was expressed in tertiles. The outcome measure SO risk was determined based on appendicular lean mass, waist circumference, handgrip strength and the 5-times sit-to-stand test. Odds ratios (OR) with a 95% confidence interval (95% CI) of high SO risk across levels of MVPA and LPA were determined by binary logistic regression adjusted for the level of systemic inflammation (high-sensitivity C-reactive protein) and dietary protein intake.

Compared to the inactive group, ORs of having a high SO risk were about 50%-80% lower, depending on the MVPA level, with the largest risk reduction in the highly active group (OR: 0.23, 95% CI: 0.13-0.39; p < 0.05). The likelihood of having a high SO risk was significantly lower among the highly active group compared to the active group (OR: 0.50; 95% CI: 0.33-0.77; p < 0.05). More time in LPA was associated with a significantly lower likelihood of having high SO risk (highest vs. lowest tertile: OR: 0.52, 95% CI: 0.30-0.89; p < 0.05) only in participants with low amounts of MVPA. In contrast, LPA was not associated with SO risk among participants meeting the MVPA recommendation.

MVPA is strongly associated with a lower likelihood of having a high SO risk in older adults, independently of the level of systemic inflammation and intakes of dietary proteins. LPA is related to SO risk in sedentary older adults, which supports the promotion of physical activity regardless of intensity for mitigating SO.