Correlates of subjectively and objectively measured physical activity in young adolescents

Background： Many studies examining individual-level correlates in youth utilize self-report rather than objective measures of physical activity （PA）. This utilization of self-report may result in associations that are not present when examining objectively measured PA. The present study investigates the relationship between hypothesized correlates of PA with objectively and subjectively measured PA. Methods： Participating children （n 232, 101 males, mean age - 12.3 years） provided a minimum of four monitored days of PA （via accelerometer） and completed a survey assessing moderate-to-vigorous physical activity （MVPA）, sport competence, appearance, enjoyment, and self-efficacy. Height and weight were measured and body mass index （BMI） was calculated. Results： Hierarchical regression models controlling for sex, race, and BMI Z-score showed that only sex and BMI Z-score were significant correlates of objective MVPA while only sex was a significant correlate of objective total PA. However, in a separate model examining the relationship with subjective MVPA, enjoyment of PA and self-efficacy for PA were the only significant correlates of self-reported PA. Conclusion： Measuring MVPA via self-report versus accelerometry produces considerably different results in a sample of young adolescents. Future studies should use caution when selecting outcome measures if the intent is to identify modifiable correlates of MVPA in youth.

Building partnerships in a complex academic research environment

Change in the information landscape has afforded librarians an opportunity to actively seek new skills,knowledge,and opportunities in order to effectively integrate expertise at the point of need; in particular,librarians have shifted from being information providers to embedded information creators,integrators,and innovators. Our ability to capitalize on the strengths of our specific institutional environments and respond to information needs is ever more important if we are to remain central to the work of our academic enterprise. This article describes how the University of North Carolina at Chapel Hill ＇ s Health Sciences Library(HSL） has sought opportunities and established successful partnerships that integrate library expertise aligning with the two core strategies of Carolina＇s new strategic framework Blueprint for Next： Of the Public,For the Public,and Innovation Made Fundamental.These efforts have resulted in initiatives that improve access to quality health care and health care information for North Carolinians,accelerate the campus＇ research enterprise,and demonstrate the importance of evidence-based care at UNC and globally. By understanding and identifying the needs of our various stakeholders,we have been able to progress with our understanding of what key problems need to be solved,what interventions need to be developed,and in what ways librarians can integrate expertise around information synthesis and critical thinking so that we are seen as valued partners in our complex academic environment.