Normative values for relative schoolbag weight in primary school children aged 6-14 from Czech Republic: A pilot study

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14510%2F19%3A00116345" target="_blank" >RIV/00216224:14510/19:00116345 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1371/journal.pone.0225741" target="_blank" >https://doi.org/10.1371/journal.pone.0225741</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1371/journal.pone.0225741" target="_blank" >10.1371/journal.pone.0225741</a>

Result language

angličtina

Original language name

Normative values for relative schoolbag weight in primary school children aged 6-14 from Czech Republic: A pilot study

Original language description

Little evidence from observational studies has been provided regarding `optimal' relative schoolbag load during primary education. Also, no study to date has provided reference-based standards for relative schoolbag weight. Therefore, the main purpose of the study was to establish normative values of relative schoolbag weight in a sample of children. In this crosssectional study, we recruited 584 primary school students aged 6-14 (mean(age)+/- SD = 9.6 +/- 2.4 yrs, mean(height)+/- SD = 1.4 +/- 0.2 m, mean(weigh)t +/- SD = 37.5 +/- 13.3 kg, mean(body-mass) (index)+/- SD = 17.6 +/- 3.1 kg/m(2), 44.4% girls) chosen from five schools in the city of Brno. Schoolbag weight and child's body weight were objectively measured by using digital scale. Relative schoolbag weight was calculated by dividing schoolbag weight with child's body weight and the result was expressed in percentage. Lambda, Mu and Sigma (LMS) method was used to create sex- and age-percentile curves. Boys carried slightly heavier schoolbag, compared with girls (mean difference 0.2 kg, p = 0.020). No significant differences between sexes in relative schoolbag weight were observed (p = 0.240). Median values (P50) for boys and girls were similar and the largest observed between ages 6-9 in boys (15-17%) and 6-8 in girls (16-18%). The percentage of children carrying relative schoolbag weight beyond 10% of their body weight was very high, especially between ages 6-10 in boys (85.1-100%) and 6-11 in girls (86.8-95.4%). This study provides first sex- and age- relative schoolbag weight normative values in primary school children. Future studies should use similar methods for generating comparable data.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

30306 - Sport and fitness sciences

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Plos one

ISSN

1932-6203

e-ISSN

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Volume of the periodical

14

Issue of the periodical within the volume

11

Country of publishing house

US - UNITED STATES

Number of pages

7

Pages from-to

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UT code for WoS article

000533891000044

EID of the result in the Scopus database

2-s2.0-85075514066