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首页> 外文期刊>International Journal of Behavioral Nutrition and Physical Activity >Increasing weight-bearing physical activity and calcium-rich foods to promote bone mass gains among 9–11 year old girls: outcomes of the Cal-Girls study
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Increasing weight-bearing physical activity and calcium-rich foods to promote bone mass gains among 9–11 year old girls: outcomes of the Cal-Girls study

机译：增加负重体育锻炼和富含钙的食物以促进9-11岁女孩的骨量增加：Cal-Girls研究的结果

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Background A two-year, community-based, group-randomized trial to promote bone mass gains among 9–11 year-old girls through increased intake of calcium-rich foods and weight-bearing physical activity was evaluated. Methods Following baseline data collection, 30 5th-grade Girl Scout troops were randomized to a two-year behavioral intervention program or to a no-treatment control group. Evaluations were conducted at baseline, one year, and two years. Measures included bone mineral content, density, and area (measured by DXA), dietary calcium intake (24-hour recall), and weight-bearing physical activity (physical activity checklist interview). Mixed-model regression was used to evaluate treatment-related changes in bone mineral content (g) for the total body, lumbar spine (L1-L4), proximal femur, one-third distal radius, and femoral neck. Changes in eating and physical activity behavioral outcomes were examined. Results Although the intervention was implemented with high fidelity, no significant intervention effects were observed for total bone mineral content or any specific bone sites. Significant intervention effects were observed for increases in dietary calcium. No significant intervention effects were observed for increases in weight-bearing physical activity. Conclusion Future research needs to identify the optimal dosage of weight-bearing physical activity and calcium-rich dietary behavior change required to maximize bone mass gains in pre-adolescent and adolescent girls.
机译：背景评估了一项为期两年的基于社区的小组随机试验，目的是通过增加摄入富含钙的食物和负重体育锻炼来促进9-11岁女孩的骨量增加。方法收集基线数据后，将30名5级女童军部队随机分配到为期两年的行为干预计划或无治疗对照组。在基线，一年和两年进行评估。测量包括骨矿物质含量，密度和面积（通过DXA测量），饮食中钙的摄入量（24小时召回）和负重身体活动（身体活动清单访问）。使用混合模型回归来评估治疗相关的全身，腰椎（L1-L4），股骨近端、,骨远端三分之一和股骨颈的矿物质含量（g）的变化。检查饮食和体育锻炼行为结果的变化。结果尽管采取了高保真的干预措施，但对于总骨矿物质含量或任何特定的骨部位均未观察到明显的干预效果。观察到饮食中钙的增加有明显的干预作用。对于负重体育锻炼没有观察到明显的干预作用。结论未来的研究需要确定最佳的负重体力活动剂量和富含钙的饮食行为改变，以最大限度地增加青春期前和青春期女孩的骨骼质量。

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