Dataset Information

Changes in time-segment specific physical activity between ages 10 and 14 years: A longitudinal observational study.

ABSTRACT:

Objectives

Describe (1) time-segment specific changes in physical activity (PA) into adolescence, (2) differences in change in PA between specific time-segments (weekdays-weekends, in-school-out-of-school, out-of-school-weekends, lesson-time-lunch-time), and (3) associations of change in time-segment specific with overall PA.

Design

Longitudinal observational study (4-year follow-up).

Methods

Children from the SPEEDY study (n=769, 42% boys) had PA measured by accelerometer for at least three days at ages 10.2±0.3, 11.2±0.3 and 14.3±0.3years. Changes in moderate-to-vigorous PA (?MVPA, minutes ?2000counts/minute [cpm]) and total PA (?TPA, average cpm) during weekdays, weekends, in-school, out-of-school, lesson-times and lunch-times, were tested using three level (age, individual, school) mixed-effects linear regression. Differences in ?MVPA/?TPA between time-segments were tested using time-segment×age interaction terms. Associations of four-year time-segment specific ?MVPA/?TPA with four-year overall ?MVPA/?TPA were tested using two level (time-segment specific ?MVPA/?TPA, school) mixed-effects linear regression.

Results

MVPA and TPA declined in all time-segments, except lesson-time MVPA. Annual ?MVPA and, for boys only, ?TPA was greater on weekends than weekdays (beta±SE for interaction term: boys, -3.53±0.83min, -29.64±7.64cpm; girls, -2.20±0.64min) and out-of-school (boys, -4.36±0.79min, -19.36±8.46cpm; girls, -2.44±0.63min). ?MVPA and ?TPA during lunch-time was greater than during lesson-time (boys, -0.96±0.20min, -36.43±6.55cpm; girls, -0.90±0.13min, -38.72±4.40cpm). ?TPA was greater out-of-school than in-school (boys, -19.89±6.71cpm; girls, -18.46±6.51cpm). For all time-segments, four-year ?MVPA/?TPA was positively associated with four-year overall ?MVPA/?TPA (all p<0.042), except for girl's in-school and lunch-time TPA.

Conclusions

Interventions focused on PA maintenance could target all time-segments, but weekends and out-of-school may be particularly advantageous due to the relatively large declines observed.

SUBMITTER: Brooke HL

PROVIDER: S-EPMC4678171 | biostudies-literature | 2016 Jan

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

Changes in time-segment specific physical activity between ages 10 and 14 years: A longitudinal observational study.

Brooke Hannah L HL Atkin Andrew J AJ Corder Kirsten K Ekelund Ulf U van Sluijs Esther M F EM

Journal of science and medicine in sport 20141016 1

<h4>Objectives</h4>Describe (1) time-segment specific changes in physical activity (PA) into adolescence, (2) differences in change in PA between specific time-segments (weekdays-weekends, in-school-out-of-school, out-of-school-weekends, lesson-time-lunch-time), and (3) associations of change in time-segment specific with overall PA.<h4>Design</h4>Longitudinal observational study (4-year follow-up).<h4>Methods</h4>Children from the SPEEDY study (n=769, 42% boys) had PA measured by accelerometer ...[more]

PMID: 25459234

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Dataset Information

Changes in time-segment specific physical activity between ages 10 and 14 years: A longitudinal observational study.

Objectives

Design

Methods

Results

Conclusions

Publications

Changes in time-segment specific physical activity between ages 10 and 14 years: A longitudinal observational study.

Similar Datasets

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