Impact of martial arts (Judo, Karate, and Kung Fu) on bone mineral density gains in adolescents of both genders: 9-month follow-up

Igor H. Ito, Han C.G. Kemper, Ricardo R. Agostinete, Kyle R. Lynch, Diego G.D. Christofaro, Enio R. Ronque, Rômulo A. Fernandes

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Purpose: To compare bone mineral density (BMD) gains in adolescents of both genders stratified according to different martial art styles in a 9-month follow-up study. Methods: The longitudinal study consisted of 29 adolescents of both genders and age between 11 and 17 years stratified into a control group (not engaged in any sport) and 50 fighters (kung fu/karate, n = 29; judo, n = 21). All 79 subjects underwent anthropometric measures (weight, height, leg length, and height set) and dual-energy X-ray absorptiometry (BMD, in g/cm2) at 2 moments, baseline and 9 months later. Maturity offset (age at peak height velocity), lean soft tissue, chronological age, and resistance training were treated as covariates. Results: Male judoists presented higher gains in BMD-spine [0.098 g/cm2 (95% confidence interval, 0.068–0.128)] than control group [0.040 g/cm2 (95% confidence interval, 0.011–0.069)] (post hoc test with P = .030). There was no effect of martial art on BMD gains among girls. Independently of gender, in all multivariate models, lean soft tissue constituted the most relevant covariate. Conclusions: Judo practice in adolescents affected the bone accrual significantly after 9-month follow-up compared with controls, mainly in boys.

Original languageEnglish
Pages (from-to)496-503
Number of pages8
JournalPediatric Exercise Science
Volume29
Issue number4
DOIs
Publication statusPublished - 1 Nov 2017

Cite this

Ito, Igor H. ; Kemper, Han C.G. ; Agostinete, Ricardo R. ; Lynch, Kyle R. ; Christofaro, Diego G.D. ; Ronque, Enio R. ; Fernandes, Rômulo A. / Impact of martial arts (Judo, Karate, and Kung Fu) on bone mineral density gains in adolescents of both genders : 9-month follow-up. In: Pediatric Exercise Science. 2017 ; Vol. 29, No. 4. pp. 496-503.
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abstract = "Purpose: To compare bone mineral density (BMD) gains in adolescents of both genders stratified according to different martial art styles in a 9-month follow-up study. Methods: The longitudinal study consisted of 29 adolescents of both genders and age between 11 and 17 years stratified into a control group (not engaged in any sport) and 50 fighters (kung fu/karate, n = 29; judo, n = 21). All 79 subjects underwent anthropometric measures (weight, height, leg length, and height set) and dual-energy X-ray absorptiometry (BMD, in g/cm2) at 2 moments, baseline and 9 months later. Maturity offset (age at peak height velocity), lean soft tissue, chronological age, and resistance training were treated as covariates. Results: Male judoists presented higher gains in BMD-spine [0.098 g/cm2 (95{\%} confidence interval, 0.068–0.128)] than control group [0.040 g/cm2 (95{\%} confidence interval, 0.011–0.069)] (post hoc test with P = .030). There was no effect of martial art on BMD gains among girls. Independently of gender, in all multivariate models, lean soft tissue constituted the most relevant covariate. Conclusions: Judo practice in adolescents affected the bone accrual significantly after 9-month follow-up compared with controls, mainly in boys.",
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Impact of martial arts (Judo, Karate, and Kung Fu) on bone mineral density gains in adolescents of both genders : 9-month follow-up. / Ito, Igor H.; Kemper, Han C.G.; Agostinete, Ricardo R.; Lynch, Kyle R.; Christofaro, Diego G.D.; Ronque, Enio R.; Fernandes, Rômulo A.

In: Pediatric Exercise Science, Vol. 29, No. 4, 01.11.2017, p. 496-503.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Impact of martial arts (Judo, Karate, and Kung Fu) on bone mineral density gains in adolescents of both genders

T2 - 9-month follow-up

AU - Ito, Igor H.

AU - Kemper, Han C.G.

AU - Agostinete, Ricardo R.

AU - Lynch, Kyle R.

AU - Christofaro, Diego G.D.

AU - Ronque, Enio R.

AU - Fernandes, Rômulo A.

PY - 2017/11/1

Y1 - 2017/11/1

N2 - Purpose: To compare bone mineral density (BMD) gains in adolescents of both genders stratified according to different martial art styles in a 9-month follow-up study. Methods: The longitudinal study consisted of 29 adolescents of both genders and age between 11 and 17 years stratified into a control group (not engaged in any sport) and 50 fighters (kung fu/karate, n = 29; judo, n = 21). All 79 subjects underwent anthropometric measures (weight, height, leg length, and height set) and dual-energy X-ray absorptiometry (BMD, in g/cm2) at 2 moments, baseline and 9 months later. Maturity offset (age at peak height velocity), lean soft tissue, chronological age, and resistance training were treated as covariates. Results: Male judoists presented higher gains in BMD-spine [0.098 g/cm2 (95% confidence interval, 0.068–0.128)] than control group [0.040 g/cm2 (95% confidence interval, 0.011–0.069)] (post hoc test with P = .030). There was no effect of martial art on BMD gains among girls. Independently of gender, in all multivariate models, lean soft tissue constituted the most relevant covariate. Conclusions: Judo practice in adolescents affected the bone accrual significantly after 9-month follow-up compared with controls, mainly in boys.

AB - Purpose: To compare bone mineral density (BMD) gains in adolescents of both genders stratified according to different martial art styles in a 9-month follow-up study. Methods: The longitudinal study consisted of 29 adolescents of both genders and age between 11 and 17 years stratified into a control group (not engaged in any sport) and 50 fighters (kung fu/karate, n = 29; judo, n = 21). All 79 subjects underwent anthropometric measures (weight, height, leg length, and height set) and dual-energy X-ray absorptiometry (BMD, in g/cm2) at 2 moments, baseline and 9 months later. Maturity offset (age at peak height velocity), lean soft tissue, chronological age, and resistance training were treated as covariates. Results: Male judoists presented higher gains in BMD-spine [0.098 g/cm2 (95% confidence interval, 0.068–0.128)] than control group [0.040 g/cm2 (95% confidence interval, 0.011–0.069)] (post hoc test with P = .030). There was no effect of martial art on BMD gains among girls. Independently of gender, in all multivariate models, lean soft tissue constituted the most relevant covariate. Conclusions: Judo practice in adolescents affected the bone accrual significantly after 9-month follow-up compared with controls, mainly in boys.

KW - Bone health

KW - Combat sports

KW - Pediatric population

KW - Youth

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U2 - 10.1123/pes.2017-0019

DO - 10.1123/pes.2017-0019

M3 - Article

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EP - 503

JO - Pediatric Exercise Science

JF - Pediatric Exercise Science

SN - 0899-8493

IS - 4

ER -