Sex specific association of physical activity on proximal femur BMD in 9 to 10 year-old children.

The results of physical activity (PA) intervention studies suggest that adaptation to mechanical loading at the femoral neck (FN) is weaker in girls than in boys. Less is known about gender differences associated with non-targeted PA levels at the FN or other clinically relevant regions of the proxi...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Graça Cardadeiro, Fátima Baptista, Rui Ornelas, Kathleen F Janz, Luís B Sardinha
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0ece4f29f9094d7bbdd05e3ecc5686e8
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:0ece4f29f9094d7bbdd05e3ecc5686e8
record_format	dspace
spelling	oai:doaj.org-article:0ece4f29f9094d7bbdd05e3ecc5686e82021-11-18T08:07:02ZSex specific association of physical activity on proximal femur BMD in 9 to 10 year-old children.1932-620310.1371/journal.pone.0050657https://doaj.org/article/0ece4f29f9094d7bbdd05e3ecc5686e82012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23209801/?tool=EBIhttps://doaj.org/toc/1932-6203The results of physical activity (PA) intervention studies suggest that adaptation to mechanical loading at the femoral neck (FN) is weaker in girls than in boys. Less is known about gender differences associated with non-targeted PA levels at the FN or other clinically relevant regions of the proximal femur. Understanding sex-specific relationships between proximal femur sensitivity and mechanical loading during non-targeted PA is critical to planning appropriate public health interventions. We examined sex-specific associations between non-target PA and bone mineral density (BMD) of three sub-regions of the proximal femur in pre- and early-pubertal boys and girls. BMD at the FN, trochanter (TR) and intertrochanter (IT) regions, and lean mass of the whole body were assessed using dual-energy x-ray absorptiometry in 161 girls (age: 9.7±0.3 yrs) and 164 boys (age: 9.7±0.3 yrs). PA was measured using accelerometry. Multiple linear regression analyses (adjusted for body height, total lean mass and pubertal status) revealed that vigorous PA explained 3-5% of the variability in BMD at all three sub-regions in boys. In girls, vigorous PA explained 4% of the variability in IT BMD and 6% in TR BMD. PA did not contribute to the variance in FN BMD in girls. An additional 10 minutes per day of vigorous PA would be expected to result in a ∼1% higher FN, TR, and IT BMD in boys (p<0.05) and a ∼2% higher IT and TR BMD in girls. In conclusion, vigorous PA can be expected to contribute positively to bone health outcomes for boys and girls. However, the association of vigorous PA to sub-regions of the proximal femur varies by sex, such that girlś associations are heterogeneous and the lowest at the FN, but stronger at the TR and the IT, when compared to boys.Graça CardadeiroFátima BaptistaRui OrnelasKathleen F JanzLuís B SardinhaPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 11, p e50657 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Graça Cardadeiro Fátima Baptista Rui Ornelas Kathleen F Janz Luís B Sardinha Sex specific association of physical activity on proximal femur BMD in 9 to 10 year-old children.
description	The results of physical activity (PA) intervention studies suggest that adaptation to mechanical loading at the femoral neck (FN) is weaker in girls than in boys. Less is known about gender differences associated with non-targeted PA levels at the FN or other clinically relevant regions of the proximal femur. Understanding sex-specific relationships between proximal femur sensitivity and mechanical loading during non-targeted PA is critical to planning appropriate public health interventions. We examined sex-specific associations between non-target PA and bone mineral density (BMD) of three sub-regions of the proximal femur in pre- and early-pubertal boys and girls. BMD at the FN, trochanter (TR) and intertrochanter (IT) regions, and lean mass of the whole body were assessed using dual-energy x-ray absorptiometry in 161 girls (age: 9.7±0.3 yrs) and 164 boys (age: 9.7±0.3 yrs). PA was measured using accelerometry. Multiple linear regression analyses (adjusted for body height, total lean mass and pubertal status) revealed that vigorous PA explained 3-5% of the variability in BMD at all three sub-regions in boys. In girls, vigorous PA explained 4% of the variability in IT BMD and 6% in TR BMD. PA did not contribute to the variance in FN BMD in girls. An additional 10 minutes per day of vigorous PA would be expected to result in a ∼1% higher FN, TR, and IT BMD in boys (p<0.05) and a ∼2% higher IT and TR BMD in girls. In conclusion, vigorous PA can be expected to contribute positively to bone health outcomes for boys and girls. However, the association of vigorous PA to sub-regions of the proximal femur varies by sex, such that girlś associations are heterogeneous and the lowest at the FN, but stronger at the TR and the IT, when compared to boys.
format	article
author	Graça Cardadeiro Fátima Baptista Rui Ornelas Kathleen F Janz Luís B Sardinha
author_facet	Graça Cardadeiro Fátima Baptista Rui Ornelas Kathleen F Janz Luís B Sardinha
author_sort	Graça Cardadeiro
title	Sex specific association of physical activity on proximal femur BMD in 9 to 10 year-old children.
title_short	Sex specific association of physical activity on proximal femur BMD in 9 to 10 year-old children.
title_full	Sex specific association of physical activity on proximal femur BMD in 9 to 10 year-old children.
title_fullStr	Sex specific association of physical activity on proximal femur BMD in 9 to 10 year-old children.
title_full_unstemmed	Sex specific association of physical activity on proximal femur BMD in 9 to 10 year-old children.
title_sort	sex specific association of physical activity on proximal femur bmd in 9 to 10 year-old children.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/0ece4f29f9094d7bbdd05e3ecc5686e8
work_keys_str_mv	AT gracacardadeiro sexspecificassociationofphysicalactivityonproximalfemurbmdin9to10yearoldchildren AT fatimabaptista sexspecificassociationofphysicalactivityonproximalfemurbmdin9to10yearoldchildren AT ruiornelas sexspecificassociationofphysicalactivityonproximalfemurbmdin9to10yearoldchildren AT kathleenfjanz sexspecificassociationofphysicalactivityonproximalfemurbmdin9to10yearoldchildren AT luisbsardinha sexspecificassociationofphysicalactivityonproximalfemurbmdin9to10yearoldchildren
_version_	1718422152102805504

Sex specific association of physical activity on proximal femur BMD in 9 to 10 year-old children.

Ejemplares similares