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Aoife Lane, Michael Harrison, and Niamh Murphy

Background:

Independent associations between screen time (ST)/physical activity (PA) and overweight (OW)/obesity have been demonstrated but little research exists on the role of ST among sufficiently active children.

Purpose:

To examine the combined influence of ST and PA on risk of OW/obesity in a nationally representative sample of 9-year-old Irish children.

Methods:

The sample in this cross sectional analysis contained 8568 children. Self-report parent data were used to group children into ST and PA categories and related to OW/obesity using forced entry logistic regression.

Results:

High ST (> 3 hours/day), bedroom TV and mobile phone ownership increased risk of OW/obesity in high and low active children (P < .05). Low PA (<9 bouts fortnightly) was also associated with OW/obesity. In combined analyses, OW/obesity was lowest in the reference low ST/high PA group with ORs of 1.38, 1.63, and 2.07, respectively, in the low ST/low PA, high ST/high PA, and high ST/low PA groups. Access to electronic media, low socioeconomic status, parental obesity, and not engaging in sports were all related to high ST (P < .05).

Conclusion:

This study supports findings that ST is associated with OW/Obesity demonstrating this separately in high and low active children.

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Aoife Lane, Niamh Murphy, Adrian Bauman, and Tien Chey

Background:

To promote maintenance of sufficient physical activity (PA), better understanding of factors associated with behavioral relapse is needed.

Purpose:

To identify PA relapsers and predictors of this state in a large community sample of women who participated in 2 mass 10-km events in Ireland.

Methods:

Relapsers to ‘low active’ were identified at 3-month follow-up, and factors associated with relapse investigated.

Results:

11% of the sample decreased their participation by at least 60 minutes of moderate-intensity PA per week and regressed to ‘insufficiently active.’ Adjusted analysis indicated relapse was associated with walking the event (OR = 1.40; 95% CI = 1.05−1.85) and not achieving tertiary education (OR = 1.49; 95% CI = 1.18−1.88). Normal-range BMI, training continuously, urban residence, and increases in self efficacy and positive perceptions of the physical environment were related to lower incidence of relapse.

Conclusion:

Education, living in an urban area, BMI, walking the event, training, and self efficacy are all associated with relapse and while mass events are a useful motivator for PA, strategies are required following events to maintain participation levels and generate a lasting public health impact.