Searchable abstracts of presentations at key conferences on calcified tissues
Bone Abstracts (2013) 2 P79 | DOI: 10.1530/boneabs.2.P79

ICCBH2013 Poster Presentations (1) (201 abstracts)

High sedentary lifestyle practices has adverse influence on musculoskeletal health in adolescent boys and girls: findings from a population-based study in Malaysia

Pey Sze Teo 1 , Nurul-Fadhilah Abdullah 1 , Chee Keong Chen 2 , Mohd Ezane Aziz 2 & Leng Huat Foo 1


1School of Health Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia; 2School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia.


The combined effect of lifestyle physical activity (PA) and sedentary behavioral practices on musculoskeletal health in growing populations is still poorly understood.

Objectives: To investigate the combined influence of mechanical loading of weight-bearing PA (WBPA) and screen-based sedentary practice (SSR) on musculoskeletal profiles among 455 adolescents aged 12–19 years.

Methods: Validated PA and SSR behaviour assessments were used to determine daily physical activities and sedentary practices, respectively. Bone mass of total body (TB), lumbar spine (LS) and proximal femur (PF) was assessed using dual energy X-ray absorptiometry, while muscular strength of the upper and lower extremity were determined using handgrip and isokinetic dynamometers respectively.

Results: Four groups of combined influence of the WBPA and SSR were i) HighWBPALowSSR, ii) HighWBPAHighSSR, iii) LowWBPALowSSR and iv) LowWBPAHighSSR. Multivariate analysis model showed that adolescents with high SSR and low WBPA had significantly lower size-adjusted bone mineral content (BMC) of the LS and PF (all, P<0.01) and TB bone area (TBBA) (P<0.001), muscular strength of the handgrip (P<0.001) and hamstring (P<0.01) than those at high WBPA and low SSR group, after adjusting for body size, pubertal growth status, socio-demographic and calcium intakes. Furthermore, participants with higher levels of WBPA and SSR practices had significantly higher size-adjusted PFBMC (P<0.01) and TBBA (P<0.01) compared to those adolescents engaged only in high SSR levels.

Conclusion: These findings suggest that adolescents with higher participation of daily WBPA and low SSR practices exert positive impact on bone mass and muscular strengths than those involved only in high sedentary practice. Effective strategies to promote active lifestyle practices should be emphasised in children and adolescents in order to maximise bone mass accretion and muscular strength during these growing years.

Declaration of interest: This study was funded by University Science Malaysia Research University (RU grant: 1001/PPSK/812015).

Volume 2

6th International Conference on Children's Bone Health

Rotterdam, The Netherlands
22 Jun 2013 - 25 Jun 2013

ICCBH 

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