Association Between Physical Activity With Bone Mineral Density And Handgrip In Children With Osteogenesis Imperfecta

Abstract

PURPOSE: To evaluate the association between physical activity with bone mineral density and handgrip in children with osteogenesis imperfecta. METHODS: The sample consisted of 8 children of both sexes (8.2±1.3) years old, with osteogenesis imperfecta (I, III and IV type), body weight (24.0±7.9) kg, height (116.9±14.1)cm, cycle of intravenous pamidronate therapy (7.2±4.9). These patients are linked to the Reference Center for Osteogenesis Imperfecta in Santa Casa Medical School. Weight (kg), height (cm), handgrip (kg) were evaluated by CELAFISCS standardization. Physical activity (MET's) [Barros et al., 1993], total bone mineral density (g/cm2), total body less head TBLH (g/cm2) lumbar bone mineral density (g/cm2) [Bishop et al., 2008] and bilateral handgrip (Matsudo, 2005). STATISTICAL ANALYSIS: Pearson's correlation (r) was used for association between usual weekly physical activity and the following variables: total bone mineral density (g/cm2), total body less head TBLH (g/cm2), lumbar bone mineral density (g/cm2), and bilateral handgrip (kg). It was used a significant level of p≤ .05. RESULTS: There was a positive and significant high intensity correlation between physical activity with lumbar bone mineral density, but not with total bone mineral density, total body less head TBLH, and bilateral handgrip (see table bellow). CONCLUSION: it seems that physical activity exert a positive effect on the lumbar bone mineral density. However, physical activity was not significantly associated with total bone mineral density, total body less head TBLH and handgrip in children with osteogenesis imperfecta.