The development of overweight and bone density among adolescent girls: A 3-year prospective cohort study

青少年时期超重与许多健康问题有关，无论是在青春期还是在整个生命周期中。澳大利亚成年人超重的比例正在迅速增加，澳大利亚青少年超重的比例似乎也在增加。不幸的是，关于体育活动、久坐活动和饮食脂肪摄入对青少年超重发展的相对影响知之甚少。了解这一问题将有助于我们预防澳大利亚青少年超重发展和保持健康体重的努力。老年人骨折对他们的整体健康、生活质量以及独立和满意生活的能力有重大影响。骨骼强度在青春期达到顶峰，尽管骨骼强度可以在成年后通过适当的饮食和体育活动在很大程度上保持，但在成年期几乎无法进一步加强骨骼。公共卫生的目标是促进青少年骨骼强度的最大发展，以减少未来老年人骨质疏松症的严重程度。我们对影响最大骨强度发展的因素的理解不足以设计旨在最大限度提高当前一代青少年骨强度的方案和干预措施。这项研究旨在对我们理解青少年超重和骨骼强度的发展做出重大贡献。随着我们对这些健康问题的理解的提高，我们将能够为澳大利亚人口的健康做出更有效的贡献，无论是在青春期还是在整个生命周期。

Being overweight as an adolescent is associated with many health problems, both during adolescence and throughout the rest of the life span. The proportion of Australian adults who are overweight is increasing rapidly and it appears that overweight is also increasing among Australian adolescents. Unfortunately, little is known about the relative influences of physical activity, sedentary activity and dietary fat intake on the development of overweight among adolescents. Understanding this issue will inform our efforts to prevent the development of overweight and to maintain healthy weight among Australian adolescents. Bone fractures among older adults have a major impact on their overall health, quality of life and capacity for independent and satisfying living. Peak bone strength is reached during adolescence and, although bone strength can be largely maintained though adult life with appropriate diet and physical activity, little can be done to further strengthen bones during adulthood. The goal of public health is to foster the development of maximum bone strength among adolescents in order to reduce the severity of osteoporosis among the older adults of the future. Our understanding of the factors which influence the development of maximum bone strength is inadequate to the task of designing programs and interventions intended maximise bone strength among the current generation of adolescents. This proposed study is intended to make a significant contribution to our understanding of the development of overweight and bone strength among adolescents. As our understanding of these health issues improves we will be able to make more effective contributions to the health of the Australian population, both during adolescence and across the lifespan.