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Muscular Strength of Upper and Lower Limbs and Self-Esteem in Chilean SchoolChildren: Independent Associations with Body Composition Indicators

Authors
  • Bolados, Cristian Cofre1
  • Ferrari, Gerson1
  • Suárez-Reyes, Mónica1
  • Quintiliano Scarpelli Dourado, Daiana
  • Diaz-Peña, Helen
  • Pizarro, Tito1
  • 1 (T.P.)
Type
Published Article
Journal
International Journal of Environmental Research and Public Health
Publisher
MDPI AG
Publication Date
Jan 06, 2021
Volume
18
Issue
2
Identifiers
DOI: 10.3390/ijerph18020361
PMID: 33418855
PMCID: PMC7825018
Source
PubMed Central
Keywords
Disciplines
  • Article
License
Green

Abstract

The aim of this study was to analyze the relationship between muscular strength from upper and lower limbs with self-esteem among Chilean schoolchildren, drawing independent associations with body composition indicators. The sample consisted of 1078 schoolchildren. The muscular strength of the upper and lower limbs was evaluated using a digital dynamometer and long jump performance. The general strength index was calculated based on Z-score values. Rosenberg’s test was used to determine the level of self-esteem of participants. Body fat and body mass index were employed as body composition indicators. Boys had significantly more upper and lower strength, and a general strength index higher than girls (11.7 vs. 10.6; 109.7 vs. 97.4; 0.19 vs. −0.24, respectively). For boys and girls combined, there were no significant associations between all muscular strength variables and self-esteem. In boys, upper and lower limb strength was positively associated with self-esteem. In girls, no association between muscular strength and self-esteem was found. In both sexes, the general strength index was not associated with self-esteem. Strategies and programs that promote mental health and muscular strength among schoolchildren, specifically in boys, are needed.

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