Children's behavior was assessed with 3 cross-sectional random-digit-dial telephone surveys conducted 11 months before, 4 months after, and 6 months after September 11, 2001. Parents reported fewer behavior problems in children 4 months after the attacks compared with the pre-September 11 baseline. However, 6 months after the attacks, parents' reporting of behavior problems was comparable to pre-September 11 levels. In the 1st few months after a disaster, the identification of children who need mental health treatment may be complicated by a dampened behavioral response or by a decreased sensitivity of parental assessment to behavioral problems.

Objective: To systematically review the impacts of Wearable Fitness Trackers (WFTs), Motivational Interviewing (MI), and Self Determination Theory (SDT)–based interventions on physical activity (PA) and motivation for PA. Data Source: Manuscripts published between 2008 and 2018 in PubMed, Web of Science, CABAbstracts, and SPORTDiscus database were reviewed. Study Inclusion and Exclusion Criteria: Inclusion criteria were original pilot studies, randomized controlled trials (RCT), cross-sectional studies, qualitative assessments, prospective cohort studies, longitudinal observational studies, and pretest posttest designs published in peer-reviewed journals. Data Extraction: Studies were evaluated by 2 independent researchers for inclusion. Data Synthesis: Extracted data were synthesized in a tabular format and narrative summary. Results: Twenty-six studies met final inclusion criteria, 10 addressed WFT use and PA behavior, 4 investigated WFT use and its association with motivation for PA, and 10 examined SDT and/or MI and their effect on motivation for PA and/or PA behavior. Finally, 2 studies addressed SDT-based MI, WFT use, and the combined effect on PA behavior. Conclusions: While SDT-based interventions and MI positively impact motivation for PA and PA behavior, WFTs revealed mixed results. Wearable Fitness Trackers prove effective among individuals not currently meeting PA guidelines but have little impact on other populations. Self Determination Theory, MI, and WFTs use provides a promising combination of interventions to increase PA among sedentary individuals, though research is limited.

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This study used a daily diary approach to examine associations between day-level physical activity (PA) behavior, PA-specific motivational profile, and days since the COVID-19 national emergency declaration during the early months (April–June 2020) of the pandemic. A total of 468 US adults (Mage = 34.8 y, 79% female) participated in a 28-day smartphone-based daily diary study assessing PA. A baseline survey assessed PA and motivation for PA using the Behavioral Regulation in Exercise Questionnaire. Multilevel linear regression models examined the main effects and interactions of motivational profile and time (days since the US March 13, 2020, COVID-19 national emergency declaration) on daily PA minutes. Latent profile analysis identified 4 distinct motivational profiles for PA among this sample: profile 1: high amotivation (n = 100, 21%); profile 2: low controlled motivation (n = 55, 12%); profile 3: high external regulation (n = 47, 10%); and profile 4: moderate autonomous motivation (n = 266, 57%). After controlling for baseline PA, there were significant interactions between profile and time on daily PA (−0.21, P < .01). Profile 2 showed greater decreases in daily PA minutes over time than profile 1 (b = −0.29, P < .01). Profiles 3 and 4 did not indicate significant decreases in PA compared with profile 1 (b = 0.14, P = .31 and b = −0.16, P = .05, respectively). Contrary to previous research, individuals with lower controlled or moderate autonomous motivation demonstrated the largest decreases in PA over time, whereas individuals with higher amotivation or external regulation demonstrated smaller decreases over time. These findings suggest that external motivation may have provided short-term protection against declines in PA observed during early months of the COVID-19 pandemic.

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