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Temporal Relationship Between Insulin Sensitivity and the Pubertal Decline in Physical Activity in Peripubertal Hispanic and African American Females

Temporal Relationship Between Insulin Sensitivity and the Pubertal Decline in Physical Activity in Peripubertal Hispanic and African American Females

Authors :
Britni R. Belcher
Donna Spruijt-Metz
Chih-Ping Chou
Ya-Wen Hsu
Selena T. Nguyen-Rodriguez
Marc J. Weigensberg
Michael I. Goran
Arianna D. McClain
Source :
Diabetes Care
Publication Year :
2013
Publisher :
American Diabetes Association, 2013.

Abstract

OBJECTIVE Little attention has been paid to possible intrinsic biological mechanisms for the decline in physical activity that occurs during puberty. This longitudinal observational study examined the association between baseline insulin sensitivity (SI) and declines in physical activity and increases in sedentary behavior in peripubertal minority females over a year. RESEARCH DESIGN AND METHODS Participants were Hispanic and African American girls (n = 55; 76% Hispanic; mean age 9.4 years; 36% obese). SI and other insulin indices were measured at baseline using the frequently sampled intravenous glucose tolerance test. Physical activity was measured on a quarterly basis by accelerometry and self-report. RESULTS Physical activity declined by 25% and time spent in sedentary behaviors increased by ∼13% over 1 year. Lower baseline SI predicted the decline in physical activity measured by accelerometry, whereas higher baseline acute insulin response to glucose predicted the decline in physical activity measured by self-report. Time spent in sedentary behavior increased by ~13% over 1 year, and this was predicted by lower baseline SI. All models controlled for adiposity, age, pubertal stage, and ethnicity. CONCLUSIONS When evaluated using a longitudinal design with strong outcome measures, this study suggests that lower baseline SI predicts a greater decline in physical activity in peripubertal minority females.

Details

ISSN :
19355548 and 01495992
Volume :
36
Database :
OpenAIRE
Journal :
Diabetes Care
Accession number :
edsair.doi.dedup.....e11bf407562e1d0b67ff8fa7327aebf7
Full Text :
https://doi.org/10.2337/dc13-0083