Nicola D Ridgers1, Jill A Hnatiuk2, Grace E Vincent3, Anna Timperio3, Lisa M Barnett4, Jo Salmon3. 1. Centre for Physical Activity and Nutrition Research, Deakin University, Australia. Electronic address: nicky.ridgers@deakin.edu.au. 2. School of Science and Health, Western Sydney University, Australia. 3. Centre for Physical Activity and Nutrition Research, Deakin University, Australia. 4. School of Health and Social Development, Deakin University, Australia.
Abstract
OBJECTIVES: To identify the number of hours and days or nights of monitoring required to reliably estimate energy expenditure (EE), steps, waking sedentary time, light- (LPA), moderate- (MPA), vigorous- (VPA), moderate- to vigorous-intensity physical activity (MVPA), time in bed and total sleep time using the SenseWear Armband. DESIGN: Cross-sectional study. METHODS: One hundred and two children (50% boys) aged 8-11 years from six schools wore a SenseWear Armband (BodyMedia Inc, USA) for eight consecutive days (seven consecutive nights). Hourly increments of valid day wear time criteria were examined (days/week; 8h/day-14h/day). Intra-class correlation coefficients estimated the reliability for any individual day for each wear time criteria. The Spearman-Brown prophecy formula was used to determine the number of days/nights of monitoring needed to achieve reliability estimates of 0.7, 0.8 and 0.9. RESULTS: Fewer monitoring days were needed as the valid day criteria became more stringent. For example, at least 12h of wear time on at least 2 days was required to achieve a reliability of 0.7 for EE. In contrast, at least 8h/day on 5 days resulted in reliable estimates (0.7) for MPA, VPA and MVPA. Between 6 and 7 nights of monitoring were required to reliably estimate children's time in bed and total sleep time, respectively. CONCLUSIONS: A 7-day monitoring protocol in primary school-aged children would provide acceptable reliability for the assessment of EE, waking sedentary time, LPA, MPA, VPA, MVPA, time in bed and total sleep time, as assessed by the SenseWear Armband. Copyright Â
OBJECTIVES: To identify the number of hours and days or nights of monitoring required to reliably estimate energy expenditure (EE), steps, waking sedentary time, light- (LPA), moderate- (MPA), vigorous- (VPA), moderate- to vigorous-intensity physical activity (MVPA), time in bed and total sleep time using the SenseWear Armband. DESIGN: Cross-sectional study. METHODS: One hundred and two children (50% boys) aged 8-11 years from six schools wore a SenseWear Armband (BodyMedia Inc, USA) for eight consecutive days (seven consecutive nights). Hourly increments of valid day wear time criteria were examined (days/week; 8h/day-14h/day). Intra-class correlation coefficients estimated the reliability for any individual day for each wear time criteria. The Spearman-Brown prophecy formula was used to determine the number of days/nights of monitoring needed to achieve reliability estimates of 0.7, 0.8 and 0.9. RESULTS: Fewer monitoring days were needed as the valid day criteria became more stringent. For example, at least 12h of wear time on at least 2 days was required to achieve a reliability of 0.7 for EE. In contrast, at least 8h/day on 5 days resulted in reliable estimates (0.7) for MPA, VPA and MVPA. Between 6 and 7 nights of monitoring were required to reliably estimate children's time in bed and total sleep time, respectively. CONCLUSIONS: A 7-day monitoring protocol in primary school-aged children would provide acceptable reliability for the assessment of EE, waking sedentary time, LPA, MPA, VPA, MVPA, time in bed and total sleep time, as assessed by the SenseWear Armband. Copyright Â
Authors: Massimiliano de Zambotti; Nicola Cellini; Aimée Goldstone; Ian M Colrain; Fiona C Baker Journal: Med Sci Sports Exerc Date: 2019-07 Impact factor: 5.411
Authors: Ana María Contardo Ayala; Bronwyn Sudholz; Jo Salmon; David W Dunstan; Nicola D Ridgers; Lauren Arundell; Anna Timperio Journal: PLoS One Date: 2018-09-20 Impact factor: 3.240
Authors: Felicity J Pendergast; Nicola D Ridgers; Anthony Worsley; Sarah A McNaughton Journal: Int J Behav Nutr Phys Act Date: 2017-03-14 Impact factor: 6.457