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Decrease of physical activity level in adolescents with limb fractures: an accelerometry-based activity monitor

Dimitri Ceroni1, Xavier Martin, Cécile Delhumeau

  • 1Pediatric Orthopedic Unit, University of Geneva Hospitals and University of Geneva Faculty of Medicine, Geneva, Switzerland. dimitri.ceroni@hcuge.ch

BMC Musculoskeletal Disorders
|May 6, 2011
PubMed
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Adolescents with limb fractures experience significant reductions in physical activity (PA) during cast immobilization. This decreased skeletal loading may contribute to osteopenia, highlighting the need for careful management of immobilization duration.

Area of Science:

  • Orthopedics
  • Pediatric Medicine
  • Sports Medicine

Background:

  • Immobilization due to limb fractures leads to reduced physical activity (PA), potentially causing osteopenia (bone loss from disuse).
  • Mechanical loading is crucial for maintaining bone integrity.
  • Adolescents with skeletal fractures experience a decrease in PA levels.

Purpose of the Study:

  • To quantify the reduction in PA in adolescents with limb fractures during cast immobilization.
  • To compare PA levels in fractured adolescents with healthy controls.

Main Methods:

  • Two hundred twenty adolescents (120 healthy, 100 with fractures) were matched for age, gender, and season.
  • Physical activity (PA) was assessed using accelerometers during cast immobilization.

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  • Time spent in sedentary, light, moderate, and vigorous PA was recorded.

    • Main Results:

    • Adolescents with limb fractures showed a statistically significant reduction in total PA compared to healthy controls.
    • Lower limb fractures resulted in a greater decrease in total PA (-62.4%) than upper limb fractures (-30.1%).
    • Moderate-to-vigorous and vigorous PA decreased substantially in both fracture groups, with lower limb fractures showing greater reductions.

    Conclusions:

    • Accelerometers effectively measure decreased PA in adolescents with limb fractures.
    • Quantified reduction in skeletal loading during immobilization provides insight into disuse osteopenia.
    • Findings emphasize the importance of considering reduced PA and skeletal loading when determining cast immobilization duration.