The Relationship between Physical Activity and Bone during Adolescence Differs according to Sex and Biological Maturity

Weeks, Benjamin Kurt; Beck, Belinda R.

doi:10.4061/2010/546593

Cited by 19 publications

(20 citation statements)

References 33 publications

(46 reference statements)

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“…However, it is possible that BMD among women depends more on variable accrual of peak bone mass during adolescence, and that these effects overwhelm the relatively smaller longitudinal physical activity effects. A recent study among adolescents demonstrated that the relationship between risk factors and BMD depends on sex, and in particular that PA was a more important predictor of BMD in adolescent boys than in adolescent girls [29]. The sexual dimorphism in bone acquisition is related to endocrine regulators, with testosterone and estrogen having different effects on acquisition of lean mass, fat mass, and bone.…”

Section: Discussionmentioning

confidence: 99%

Physical activity, body mass index and bone mineral density—associations in a prospective population-based cohort of women and men: The Canadian Multicentre Osteoporosis Study (CaMos)

Langsetmo

Hitchcock

Kingwell

et al. 2012

Bone

114

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Section: Discussionmentioning

confidence: 99%

Physical activity, body mass index and bone mineral density—associations in a prospective population-based cohort of women and men: The Canadian Multicentre Osteoporosis Study (CaMos)

Langsetmo

Hitchcock

Kingwell

et al. 2012

Bone

114

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“…Indeed, it is possible that the environmental determinants of bone development during adolescence differ according to sex as was previously described for the relationship between physical activity and BMD (54) . In order to optimize feasibility and to minimize radiation exposure we used forearm BMD measured by DXA.…”

Section: Discussionmentioning

confidence: 99%

Associations between apriori-defined dietary patterns and longitudinal changes in bone mineral density in adolescents

Monjardino

Lucas

Ramos

et al. 2012

Public Health Nutr.

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Objective: To quantify short-and long-term associations between dietary patterns defined a priori and bone mineral density (BMD) during adolescence. Design: Dietary patterns were defined at 13 years old using a Mediterranean diet (MD) quality index, the Dietary Approaches to Stop Hypertension (DASH) diet index and the Oslo Health Study (OHS) dietary index. Linear regression coefficients were used to estimate associations between dietary patterns and forearm BMD at 13 and 17 years, measured by dual-energy X-ray absorptiometry. 2 ) in the first and third tertiles was 0?338 and 0?347 for the MD pattern, 0?342 and 0?346 for the DASH diet, and 0?344 and 0?342 for the OHS index. None of these differences were significant. Mean BMD at 17 years and prospective variation were also not significantly different between tertiles of adherence to each score. However, a trend of increased BMD at 13 years with greater adherence to the MD pattern was observed in boys (adjusted coefficient 5 0?248; 95 % CI 0?052, 0?444). Conclusions: The selected dietary patterns may not capture truly important dietary differences in determining BMD or diet may not be, beyond nutrient adequacy, a limiting determinant of BMD.

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“…Given the reported relationship of physical activity and bone to maturity [21], examination of exercise effects in older children was warranted. The POWER PE trial [8] was designed to specifically target peripubertal adolescents.…”

Section: Discussionmentioning

confidence: 99%

Are Bone and Muscle Changes from POWER PE, an 8-month In-school Jumping Intervention, Maintained at Three Years?

Weeks

Beck

2012

PLoS ONE

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Our aim was to determine if the musculoskeletal benefits of a twice-weekly, school-based, jumping regime in healthy adolescent boys and girls were maintained three years later. Subjects of the original POWER PE trial (n = 99) were contacted and asked to undergo retesting three years after cessation of the intervention. All original measures were completed including: sitting height, standing height, weight, calcaneal broadband ultrasound attenuation (BUA), whole body, hip and spine bone mineral content (BMC), lean tissue mass, and fat mass. Physical activity was recorded with the bone-specific physical activity questionnaire (BPAQ) and calcium intake was estimated with a calcium-focussed food questionnaire. Maturity was determined by Tanner staging and estimation of the age of peak height velocity (PHV). Twenty-nine adolescents aged 17.3±0.4 years agreed to participate. Three years after the intervention, there were no differences in subject characteristics between control and intervention groups (p>0.05). Three-year change in weight, lean mass, and fat mass were similar between groups (p>0.05). There were no significant group differences in three-year change in BUA or BMC at any site (p>0.05), although the between-group difference in femoral neck BMC at follow-up exceeded the least significant change. While significant group differences were not observed three years after cessation of the intervention, changes in bone parameters occurred in parallel for intervention and control groups such that the original benefits of the intervention observed within the treatment group were sustained.

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The Relationship between Physical Activity and Bone during Adolescence Differs according to Sex and Biological Maturity

Cited by 19 publications

References 33 publications

Physical activity, body mass index and bone mineral density—associations in a prospective population-based cohort of women and men: The Canadian Multicentre Osteoporosis Study (CaMos)

Physical activity, body mass index and bone mineral density—associations in a prospective population-based cohort of women and men: The Canadian Multicentre Osteoporosis Study (CaMos)

Associations between apriori-defined dietary patterns and longitudinal changes in bone mineral density in adolescents

Are Bone and Muscle Changes from POWER PE, an 8-month In-school Jumping Intervention, Maintained at Three Years?

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