Sreerangan, Pooja-Comparing Movement Measures in Toddlers with Actical and ActiGraph Accelerometers (Dr. Joyce Obeid and Dr. Sara King-Dowling)
Background: Accelerometers are considered to be the most promising tool for measuring movement in children aged 0 to 5 years. However, existing accelerometers use brand-specific proprietary activity counts to quantify movement, making it difficult to directly compare data between monitors. Studies are now shifting towards the usage of raw acceleration to measure movement, but it is currently unknown how this data will compare between different accelerometers. Therefore, the objective of this study is to determine how measures of movement in toddlers differ between two commonly used accelerometers, ActiGraph and Actical.
Methods: Healthy toddlers aged 12 to 35 months were recruited to participate in a play session. Participants were fitted with both ActiGraph and Actical accelerometers on a waistband worn over their right hip. The play session consisted of simple sedentary and active toddler-appropriate games. Participants also wore the accelerometers at home for 7 days, and caregivers were instructed to only remove the accelerometers while sleeping or when accelerometers may come into contact with water.
Results: We hypothesize that raw accelerations will differ between ActiGraph and Actical because of differences in how their sensors detect accelerations. However, the ranking of total activity counts in participants will not differ between accelerometers. Discussion: The results of this study can be used to better understand how to measure movement levels in toddlers, and eventually determine optimal physical activity levels for this population.