This study analyzed the associations between the 24-hour movement behaviors composition and fitness in preschoolers and investigated predicted changes in fitness when time in active behaviors is reallocated. This cross-sectional study was carried out with 270 preschoolers (132 boys; 3.97 ± 0.80 years-old). Light and moderate-to-vigorous physical activity (LPA and MVPA), and sedentary behavior (SB) were verified using an accelerometer. Sleep time was obtained through interviews with parents. Components of physical fitness (cardiorespiratory fitness—CRF, speed-agility, and lower-body muscular strength) were assessed using the PREFIT Battery. To verify the association between 24-hour movement behaviors and physical fitness, the compositional analysis was used, and for the time reallocation, the compositional isotemporal substitution analysis was used for active behaviors (LPA and MVPA). The daily composition, adjusted for body mass index, sex, and age, was significantly associated with CRF (P =.007; r2 = 0.29), speed-agility (P <.001; r2 = 0.14), and lower-body muscular strength (P =.01; r2 = 0.07). For CRF, the addition of MVPA, at the expense of any other behavior, was associated with significant improvements. For speed-agility and lower-body muscular strength, only reallocations between sleep and LPA yielded significant associations. The variation in CRF, speed-agility, and lower-body muscular strength was associated with the 24 hours movement composition, and reallocating 5, 10 or 15 minutes of SB or sleep for MVPA was significantly positive for CRF (P <.05). The present findings highlight the relevance of decreasing SB and increasing physical activity practice, particularly at high intensities, to promote a better CRF profile for preschoolers.
|Number of pages||9|
|Journal||Scandinavian Journal of Medicine and Science in Sports|
|Early online date||18 Feb 2021|
|Publication status||Published - Jun 2021|
Bibliographical noteThis is the peer reviewed version of the following article: Lemos, L, Clark, C, Brand, C, Pessoa, ML, Gaya, A, Mota, J, Duncan, M & Martins, C 2021, '24-hour movement behaviors and fitness in preschoolers: A compositional and isotemporal reallocation analysis', Scandinavian Journal of Medicine and Science in Sports, vol. 31, no. 6, pp. 1371-1379, which has been published in final form at 10.1111/sms.13938. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
This document is the author’s post-print version, incorporating any revisions
agreed during the peer-review process. Some differences between the published
version and this version may remain and you are advised to consult the published version if you wish to cite from it.
FunderBrazilian Federal Foundation for Support and Evaluation of Graduate Education-CAPES (CAPES-PRINT-88887.369625/2019-00)
- compositional analysis
- physical fitness
ASJC Scopus subject areas
- Orthopedics and Sports Medicine
- Physical Therapy, Sports Therapy and Rehabilitation