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Test–retest repeatability of the NX-16: a three-dimensional (3D) body scanner in a male cohort

Douglas, Caroline Clare; Turpin, Richard Lincoln; Gleadall-Siddall, Damien Oliver; Turpin, Richard; Douglas, Caroline; Ingle, Lee; Garrett, Andrew Thomas


Caroline Clare Douglas

Richard Lincoln Turpin

Damien Oliver Gleadall-Siddall

Richard Turpin

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Dr Andrew Garrett
Senior Lecturer in Exercise and Environmental Physiology


© 2019, The Author(s). Purpose: Whole-body three-dimensional scanning is a tool utilised for the collection of body girths, volume, and surface area measurements. Few studies have investigated the validity and repeatability of this technology. The aim of the present study was to investigate the test retest variability of the NX-16 body scanner (NX-16, TC2, Cary, North Carolina, USA). Methods: Phase one involved the measurement of a mannequin on 300 occasions (30 scans over 10 sessions). In phase two, 13 apparently healthy male participants were recruited; each participant was scanned a total of four times (two scans over two sessions). Stature, body mass, and body fat % were obtained. Fourteen girth measurements were obtained (chest, underbust, stomach, waist, seat, hip, R/L bicep, R/L thigh, R/L mid-thigh, and R/L calf). Coefficient of variation was calculated for measurements obtained. Results: Coefficient of variation for phase one ranged from 0.0% for the R calf, to 3.3% for the L thigh measurement. For phase two, values were higher, ranging from 0.5% for calf and chest to 4.6% for thigh measurements. Conclusions: Test–retest variability of the measurements provided by the NX-16 body scanner varied according to body location. However, variability within measurements was low using a mannequin or human participant. The NX-16 body scanner (TC2, Cary, North Carolina, USA) may be a useful tool for tracking changes in body composition over time during large population studies.


Turpin, R. L., Douglas, C. C., Gleadall-Siddall, D. O., Turpin, R., Douglas, C., Ingle, L., & Garrett, A. T. (2020). Test–retest repeatability of the NX-16: a three-dimensional (3D) body scanner in a male cohort. Sport Sciences for Health, 16(2), 337-346.

Journal Article Type Article
Acceptance Date Nov 28, 2019
Online Publication Date Dec 13, 2019
Publication Date Jun 1, 2020
Deposit Date Nov 28, 2019
Publicly Available Date Oct 27, 2022
Journal Sport Sciences for Health
Print ISSN 1824-7490
Electronic ISSN 1825-1234
Publisher Springer (part of Springer Nature)
Peer Reviewed Peer Reviewed
Volume 16
Issue 2
Pages 337-346
Keywords body scanning; body composition; anthropometrics; circumference measurements
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