Triaxial accelerometer output predicts oxygen uptake in adults with Down syndrome

Comparison of uniaxial and triaxial accelerometer outputs among individuals with and without Down syndrome

“…VM) can better predict sedentary behaviours than uniaxial accelerometer outputs for adults with DS (McCreary et al 2020). Potentially, the better accuracy of triaxial accelerometer cut point in predicting oxygen uptake from Allred et al (2019) and the higher magnitude of correlation coefficient between triaxial accelerometer outputs and oxygen uptake from the current study could cause by the unique walking characteristics of individuals with DS. It was demonstrated that individuals with DS exhibit a walking pattern characterised by significant amounts of mediolateral sway (Kubo & Ulrich 2006;Agiovlasitis et al 2009).…”

“…Previous reports found a different (non-linear) relationship between uniaxial accelerometer outputs and energy expenditure for individuals with DS, when compared with individuals without DS (Agiovlasitis et al 2012). Another study by Allred et al (2019) found that adults with DS have a different _ VO 2 to VM (triaxial accelerometer outputs). The study suggested that the difference in response could be due to the higher BMI of adults with DS (Allred et al 2019).…”

“…Uniaxial approaches are not able to fully capture the increased energy expenditure exhibited by individuals with DS because of the increased movement along the mediolateral axis. Rather, using a triaxial cut point might be better suited for measuring physical activity levels for individuals with DS, such as the cut points developed by Allred et al (2019). The results of this study recommended that when measuring physical activity levels of individuals with DS, using a cut point based on triaxial accelerometer outputs would lead to better results.…”

“…Uniaxial approaches may neglect the increased movement along the mediolateral axis among individuals with DS during walking activities, while triaxial approaches may more adequately capture their movement patterns. Currently, there are both uniaxial and triaxial cut points in measuring physical activity levels for individuals with DS (Agiovlasitis et al 2012;Allred et al 2019). However, to the authors' knowledge, no previous studies have compared the relationship of accelerometer outputs and energy expenditure between the two types of accelerometer outputs, uniaxial and triaxial of individuals with DS.…”

“…2012; Allred et al . 2019). However, to the authors' knowledge, no previous studies have compared the relationship of accelerometer outputs and energy expenditure between the two types of accelerometer outputs, uniaxial and triaxial of individuals with DS.…”