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Knee alignment can help predict sedentary behaviour in children: a pilot study.

S P Shultz1, M Kagawa, P W Fink

  • 1School of Human Movement Science, Institute of Health and Biomedical Innovation Queensland University of Technology, Brisbane, Australia - s.p.shultz@massey.ac.nz.

The Journal of Sports Medicine and Physical Fitness
|April 9, 2014
PubMed
Summary
This summary is machine-generated.

Knee alignment, or tibiofemoral angle (TFA), may predict children's sedentary behavior. Parent and child factors, including TFA, help predict activity levels, with gender-specific differences observed.

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Area of Science:

  • Pediatric Orthopedics
  • Sports Medicine
  • Child Development

Background:

  • Childhood sedentary behavior is a growing public health concern.
  • Understanding predictors of sedentary behavior is crucial for intervention development.
  • Musculoskeletal factors are not typically considered in evaluating physical activity levels.

Purpose of the Study:

  • To investigate knee alignment (tibiofemoral angle) as a potential predictor of sedentary behavior in children.
  • To explore anthropometric, musculoskeletal, and parental factors associated with children's sedentary time.
  • To examine gender-specific predictors of sedentary behavior in youth.

Main Methods:

  • 47 children (ages 5-14) and their parents underwent dual-energy x-ray absorptiometry (DXA) and anthropometric assessments.
  • Lower extremity alignment was measured using the tibiofemoral angle (TFA) from DXA scans.
  • Parent-reported questionnaires provided data on physical activity and sedentary behavior.

Main Results:

  • Parental weight, parental sedentary time, and children's TFA were moderate predictors of children's sedentary behavior (R²=0.469).
  • In boys, TFA, parental sedentary time, and waist circumference were significant predictors (R²=0.648).
  • In girls, only weight was a significant predictor of sedentary behavior (R²=0.479).

Conclusions:

  • Negative associations between TFA and sedentary behavior suggest that even minor variations in knee alignment may impact a child's physical activity motivation.
  • Orthopaedic factors, such as knee alignment, should be considered alongside other factors when assessing physical activity in children.
  • This pilot study highlights the potential role of musculoskeletal alignment in childhood sedentary behavior, warranting further investigation.