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Pediatr Phys Ther. 2013 Fall;25(3):248-55. doi: 10.1097/PEP.0b013e318299127d.

Effects of passive versus dynamic loading interventions on bone health in children who are nonambulatory.

Author information

1
Human Performance and Engineering Laboratory, Kessler Foundation Research Center, West Orange, New Jersey 07052, USA. mdd7@njit.edu

Abstract

PURPOSE:

To investigate the effectiveness of a novel dynamic standing intervention compared with a conventional passive standing intervention on bone health in children with cerebral palsy who are nonambulatory.

METHODS:

Four children in passive standers and 5 in dynamic standers were followed for 15 months (standing 30 min/d, 5 d/wk). Dual-energy x-ray absorptiometry scans of the distal femur were obtained at 3-month intervals to measure changes in bone mineral density (BMD), bone mineral content, and area.

RESULTS:

Increases in BMD were observed during dynamic standing (P < .001), whereas passive standing appeared to maintain the baseline BMD. Increases in bone mineral content were observed in each standing intervention (P < .001), with dynamic standing inducing greater increases. Increases in area were comparable between interventions (P = .315).

CONCLUSIONS:

Dynamic standing demonstrated the potential of moderate-magnitude, low-frequency loading to increase cortical BMD. Further investigations could provide insight into the mechanisms of bone health induced through loading interventions.

PMID:
23797395
DOI:
10.1097/PEP.0b013e318299127d
[Indexed for MEDLINE]

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