Psychological determinants of physical activity across the life span and critical life-stage transitions: Cross-sectional, longitudinal causal modelling, and experimental interventions

久坐不动的生活方式和缺乏身体活动日益成为世界范围内的主要健康问题。尽管体育活动对健康有益，但现有的以医学为导向的干预措施对提高人口活动水平的影响有限。我们提出了一种心理学方法，强调主观体验（心流）的质量、动机、身体自我概念和改变的跨理论模型。我们将评估与健康有关的体育活动的心理决定因素，并在两个关键的生命阶段实施实验性体育活动增强干预措施：针对青少年晚期和老年澳大利亚人。该提案在国家研究优先领域推进理论和方法，为澳大利亚的重要社会问题提供具有社会经济效益的实际解决方案。

Increasingly, sedentary lifestyles and physical inactivity are major worldwide health problems. Despite well-established health benefits of physical activity, existing medical-oriented interventions have had limited effects on increasing population-levels of activity. We propose a psychological approach, emphasizing quality of subjective experience (flow), motivation, physical self-concept, and the transtheoretical model of change. We will evaluate psychological determinants of health-related physical activity and implement experimental physical activity enhancing interventions at two critical life stages: for late-adolescents and older Australians. The proposal advances theory and methodology in a National Research Priority area, providing practical solutions to important societal problems with socioeconomic benefits for Australia.