Bammann

Generation and Validation of ActiGraph GT3X+ Accelerometer Cut-Points for Assessing Physical Activity Intensity in Older Adults. The OUTDOOR ACTIVE Validation Study

Bammann, 2021

Description

Cut-points for Euclidean norm minus one (ENMO) per 1-sec for monitors worn at each hip, wrist, and ankle in older adults (59-73 years of age). Across wear locations, R² ranged from 0.08 to 0.59.

Development/Validation

Sample: 20 (11 males) older adults, 59-73 years of age

Setting: Laboratory

Activities: Activities of daily living, cycling, treadmill walking, stationary

Criterion: MedGraphics Ultima CPX (VO₂)

Accelerometer(s): ActiGraph GT3X+ on each hip, wrist, and ankle

Validation approach: Validation using treadmill data, also cross-validated in same sample performing five other activities

Phase Designation

(What's this?)

This model is in Phase 1.

Instructions

ENMO per 1-sec is calculated as square root of the sum of the squared acceleration in each axis, minus one, with negative values rounded up to zero. Below are the developed cut-points. You can also use the R package GGIR to calculate ENMO and apply these cut-points.

Source Information

Reference:

Bammann, K., Thomson, N. K., Albrecht, B. M., Buchan, D. S., & Easton, C. (2021). Generation and validation of ActiGraph GT3X+ accelerometer cut-points for assessing physical activity intensity in older adults. The OUTDOOR ACTIVE validation study. PloS one, 16(6), e0252615. https://doi.org/10.1371/journal.pone.0252615 Link to paper

Corresponding author: Karin Bammann, bammann@uni-bremen.de

Contact

Kimberly Clevenger at accelerometerrepository@gmail.com