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Kathleen S. Wilson and Kevin S. Spink

Purpose: The use of self-efficacy to predict physical activity has a long history. However, this relationship is complex, as self-efficacy is thought to influence and be influenced by physical activity. The directionality of the self-regulatory efficacy (SRE) and physical activity relationship was examined using a cross-lagged design. A secondary purpose was to examine these relationships across differing weather conditions. Methods: Canadian adolescents (N = 337; aged between 13 and 18 years) completed the physical activity and SRE measures 4 times during a school year. Structural equation modeling was used to perform a cross-lag analysis. Results: The relationships between physical activity and SRE appeared to be weather dependent. During a more challenging weather period (eg, cold weather), the relationship between physical activity and SRE was bidirectional. However, no relationship emerged when the 2 constructs were assessed during a more optimal weather period (eg, warm weather). Conclusions: Some support has been provided for the bidirectional nature of the relationship between physical activity and SRE. The relationship appeared to be qualified by climate considerations, suggesting that future research examine how weather may relate not just to physical activity but also to the correlates of physical activity.

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Erin Gemmill, Constance M. Bayles, Kathleen McTigue, William Satariano, Ravi Sharma, and John W. Wilson

Background:

Adherence to protocols of accelerometer use by participants of research studies is crucial to ensure the most accurate measure of their physical activity.

Methods:

We used data from a study of 201 individuals 65 years of age and older to examine whether aging effects on physical and cognitive health limit the ability of an older adult to be adherent to an accelerometer protocol.

Results:

A comparison of participants who met the adherent person criteria with those who did not showed that the percentage of participants whose income is $20,000 or greater, the percentage of participants who reported white race, and the mean number of school grades completed were significantly different between the 2 groups. Logistic regression analyses showed that the best multivariate model to predict being a valid person included Instrumental Activities of Daily Living score, while the best multivariate model to predict being an adherent person included Modified Guralnik Lower Body Score and Mini-Mental State Examination Score.

Conclusions:

This study found that certain measures of physical and cognitive functioning were the best predictors of adherence to an accelerometer protocol among older adults.

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Mark W. Bruner, Jeremie M. Carreau, Kathleen S. Wilson, and Michael Penney

The purpose of this study was to investigate youth athletes’ perceptions of group norms for competition, practice, and social setting contexts in relation to personal and social factors. A secondary purpose of this study was to examine the interactions of the personal and situation factors on perceptions of group norms. Participants included 424 athletes from 35 high school sport teams who completed a survey assessing team norms in competition, practice, and social settings. Multilevel analysis results revealed differences in group norms by gender as well as gender by team tenure and gender by sport type interactions. Female teams held higher perceptions of norms for competition, practice, and social settings than male teams. Interactions between gender and team tenure and gender and sport type revealed significant differences in practice norms. No differences were found in norms by group size. The findings suggest that examining the characteristics of the team members (i.e., gender, team tenure) and team (i.e., type of sport) may enhance our understanding of group norms in a youth sport setting.

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Kim Gammage, Lori Dithurbide, Alison Ede, Blair Evans, Sean Locke, Eric Martin, Desi McEwan, and Kathleen Wilson

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Kim Gammage, Rachel Arnold, Lori Dithurbide, Alison Ede, Karl Erickson, Blair Evans, Larkin Lamarche, Sean Locke, Eric Martin, and Kathleen Wilson

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Kim Gammage, Rachel Arnold, Lori Dithurbide, Alison Ede, Karl Erickson, Blair Evans, Larkin Lamarche, Sean Locke, Eric Martin, and Kathleen Wilson

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Kim Gammage, Rachel Arnold, Nicole Bolter, Lori Dithurbide, Karl Erickson, Blair Evans, Larkin Lamarche, Sean Locke, Eric Martin, and Kathleen Wilson

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Kim Gammage, Desi McEwan, Lori Dithurbide, Alison Ede, Karl Erickson, Blair Evans, Larkin Lamarche, Sean Locke, Eric Martin, and Kathleen Wilson

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Kim Gammage, Rachel Arnold, Nicole Bolter, Lori Dithurbide, Karl Erickson, Blair Evans, Larkin Lamarche, Sean Locke, Eric Martin, and Kathleen Wilson

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Kim Gammage, Rachel Arnold, Nicole Bolter, Lori Dithurbide, Karl Erickson, Blair Evans, Larkin Lamarche, Sean Locke, Eric Martin, and Kathleen Wilson