Format

Send to

Choose Destination
Rev Paul Pediatr. 2016 Jun;34(2):210-5. doi: 10.1016/j.rpped.2015.09.001. Epub 2016 Mar 8.

[Practice of martial arts and bone mineral density in adolescents of both sexes].

[Article in Portuguese]

Author information

1
Instituto de Biociências, Universidade Estadual Paulista Júlio de Mesquita Filho (Unesp), Rio Claro, SP, Brasil. Electronic address: igorhidekiito44@gmail.com.
2
Instituto de Biociências, Universidade Estadual Paulista Júlio de Mesquita Filho (Unesp), Rio Claro, SP, Brasil.
3
Universidade Estadual Paulista Júlio de Mesquita Filho (Unesp), Presidente Prudente, SP, Brasil.
4
Universidade do Algarve, Faro, Portugal.

Abstract

OBJECTIVE:

The purpose of this study was to analyze the relationship between martial arts practice (judo, karate and kung-fu) and bone mineral density in adolescents.

METHODS:

The study was composed of 138 (48 martial arts practitioners and 90 non-practitioners) adolescents of both sexes, with an average age of 12.6 years. Bone mineral density was measured using Dual-Energy X-ray Absorptiometry in arms, legs, spine, trunk, pelvis and total. Weekly training load and previous time of engagement in the sport modality were reported by the coach. Partial correlation tested the association between weekly training load and bone mineral density, controlled by sex, chronological age, previous practice and somatic maturation. Analysis of covariance was used to compare bone mineral density values according to control and martial arts groups, controlled by sex, chronological age, previous practice and somatic maturation. Significant relationships between bone mineral density and muscle mass were inserted into a multivariate model and the slopes of the models were compared using the Student t test (control versus martial art).

RESULTS:

Adolescents engaged in judo practice presented higher values of bone mineral density than the control individuals (p-value=0.042; Medium Effect size [Eta-squared=0.063]), while the relationship between quantity of weekly training and bone mineral density was significant among adolescents engaged in judo (arms [r=0.308] and legs [r=0.223]) and kung-fu (arms [r=0.248] and spine [r=0.228]).

CONCLUSIONS:

Different modalities of martial arts are related to higher bone mineral density in different body regions among adolescents.

KEYWORDS:

Adolescentes; Adolescents; Artes marciais; Bone mineral density; Densidade mineral óssea; Martial arts

PMID:
27017002
PMCID:
PMC4917273
DOI:
10.1016/j.rpped.2015.09.001
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for Scientific Electronic Library Online Icon for PubMed Central
Loading ...
Support Center