Polar Active used in a sedentary study in older people
This study examined the association of physical activity (PA) and sedentary time (ST) with glucose metabolism according to waist circumference (WC) in older people. A population-based sample of 702 individuals (aged 67–70 years) wore wrist-worn accelerometers (Polar Active) for two weeks and underwent an oral glucose tolerance test. The associations between moderate-to-vigorous (MVPA) and light (LPA) PA, ST, and glucose metabolism across the tertiles of WC were analysed using general linear regression. The results did show that among highest waist circumference (WC) tertile, LPA negatively associated with fasting insulin, hepatic insulin resistance (HOMA-IR) and pancreatic beeta-cell function (HOMA-b). Sedentary time associated with 120 min glucose . Among lowest WC tertile, MVPA negatively associated with 30 min insulin and 120 min insulin and positively associated with Matsuda index. Light PA negatively associated with 120 min insulin As a conclusion authors stated that with the limitation of the cross-sectional study, reducing ST and increasing LPA may be beneficial for glucose metabolism among abdominally obese older adults. Lean older adults could benefit more from increasing MVPA.
Miia Länsitie et al. Association between accelerometer-measured physical activity, glucose metabolism, and waist circumference in older adults. Diabetes Res Clin Pract. 2021 Aug;178:108937. doi: 10.1016/j.diabres.2021.108937. Epub 2021 Jul 1.