TY - JOUR
T1 - Length of moderate-to-vigorous physical activity bouts and cardio-metabolic risk factors in elementary school children
AU - Willis, Erik A.
AU - Ptomey, Lauren T.
AU - Szabo-Reed, Amanda N.
AU - Honas, Jeffery J.
AU - Lee, Jaehoon
AU - Washburn, Richard A.
AU - Donnelly, Joseph E.
N1 - Funding Information:
Disclosure of funding: This study was supported by the National Institutes of Health ( R01-DK85317 ). Trial registration: US NIH Clinical Trials, NCT01699295 .
Publisher Copyright:
© 2015 Elsevier Inc.
PY - 2015/4/1
Y1 - 2015/4/1
N2 - Background: Accumulating moderate-to-vigorous physical activity (MVPA) in bouts of 10. min is associated with improved cardio-metabolic risk factors (CMRF) in adults. Purpose: To assess the association between the lengths of MVPA bouts and CMRF in elementary school age children. Methods: The sample included 396, 2nd and 3rd grade students from eastern Kansas (182 boys, 214 girls; age 7.6. ±. 0.6. years; Body Mass Index Percentile [BMI%ile]: 61.6. ±. 9.3) in the fall of 2011. Analyses were conducted in 2014. MVPA bouts were defined as sporadic (<. 5. min), short (5-<. 10. min) or medium-to-long (≥. 10. min). Latent profile analysis was used to identify distinct subgroups (classes) based on the composition of MVPA bouts. Bayesian probability-based Wald chi-square test was used to compare CMRF between classes controlling for age, sex, BMI%ile, and total moderate and total vigorous PA. Results: Three classes of accumulated physical activity were identified: A (n. =. 78); 97% sporadic 2%, short, 1% medium-to-long bouts; B (n. =. 174); 93% sporadic, 5% short, 2% medium-to-long; C (n. =. 144); and 86% sporadic, 9% short, 5% medium-to-long bouts. Class C had significantly lower BMI%ile (57.3. ±. 2.3 (SE)), waist circumference (WC; 55.8. ±. 0.5. cm) compared with Class A (BMI%ile. =. 70.9. ±. 0.5, p<. 0.01.030, WC. =. 61.0. ±. 1.0. cm, p=. 0.<. 0.01). Class B had significantly lower WC (56.6. ±. 0.6. cm), p<0.01 than Class A. No significant differences between classes were shown in other outcomes. Conclusion: Children who accumulated MVPA with a higher percentage of short (5-<. 10. min) and medium-to-long bouts (≥. 10. min) had lower BMI%ile, and WC compared with children who accumulated MVPA with a lower percentage short and medium-to-long bouts.
AB - Background: Accumulating moderate-to-vigorous physical activity (MVPA) in bouts of 10. min is associated with improved cardio-metabolic risk factors (CMRF) in adults. Purpose: To assess the association between the lengths of MVPA bouts and CMRF in elementary school age children. Methods: The sample included 396, 2nd and 3rd grade students from eastern Kansas (182 boys, 214 girls; age 7.6. ±. 0.6. years; Body Mass Index Percentile [BMI%ile]: 61.6. ±. 9.3) in the fall of 2011. Analyses were conducted in 2014. MVPA bouts were defined as sporadic (<. 5. min), short (5-<. 10. min) or medium-to-long (≥. 10. min). Latent profile analysis was used to identify distinct subgroups (classes) based on the composition of MVPA bouts. Bayesian probability-based Wald chi-square test was used to compare CMRF between classes controlling for age, sex, BMI%ile, and total moderate and total vigorous PA. Results: Three classes of accumulated physical activity were identified: A (n. =. 78); 97% sporadic 2%, short, 1% medium-to-long bouts; B (n. =. 174); 93% sporadic, 5% short, 2% medium-to-long; C (n. =. 144); and 86% sporadic, 9% short, 5% medium-to-long bouts. Class C had significantly lower BMI%ile (57.3. ±. 2.3 (SE)), waist circumference (WC; 55.8. ±. 0.5. cm) compared with Class A (BMI%ile. =. 70.9. ±. 0.5, p<. 0.01.030, WC. =. 61.0. ±. 1.0. cm, p=. 0.<. 0.01). Class B had significantly lower WC (56.6. ±. 0.6. cm), p<0.01 than Class A. No significant differences between classes were shown in other outcomes. Conclusion: Children who accumulated MVPA with a higher percentage of short (5-<. 10. min) and medium-to-long bouts (≥. 10. min) had lower BMI%ile, and WC compared with children who accumulated MVPA with a lower percentage short and medium-to-long bouts.
KW - Accelerometer
KW - Bouts
KW - Cardio-metabolic risk factors
KW - Physical activity
UR - http://www.scopus.com/inward/record.url?scp=84922434371&partnerID=8YFLogxK
U2 - 10.1016/j.ypmed.2015.01.022
DO - 10.1016/j.ypmed.2015.01.022
M3 - Article
C2 - 25647532
AN - SCOPUS:84922434371
SN - 0091-7435
VL - 73
SP - 76
EP - 80
JO - Preventive Medicine
JF - Preventive Medicine
ER -