Changes in physical activity associated with the COVID-19 pandemic in individuals with overweight and obesity: an interrupted time series analysis with historical controls.

The objective of this study was to investigate changes in physical activity patterns associated with the COVID-19 pandemic in individuals with overweight and obesity who were participating in a school district worksite weight loss program. We conducted comparative design interrupted time series analyses on physical activity device (Fitbit) data from the 2018-2019 and 2019-2020 school years (N = 211). We administered a questionnaire in 2020 to supplement device data. After the stay-at-home orders in 2020, participants tended to decrease their weekly step count (B = -1315.7, SE = 627.7, p = .045), decrease their weekly "Lightly active minutes" (B = -39.1, SE = 12.6, p = .007), and increase their weekly "Very active minutes" compared to their counterparts from the year before (B = 7.6, SE = 3.2, p = .020). Decreased motivation, gym closures, and safety concerns were cited as barriers to physical activity. Having more time and health consciousness were cited as facilitators of physical activity. The COVID-19 pandemic was related to changes in physical activity in both positive and negative ways, revealing opportunities to promote healthy lifestyle behaviors in this population. More research is needed to determine optimal approaches to health promotion in the post-COVID-19 era.

Temporal relationship of posttraumatic stress disorder symptom clusters during and after an expressive writing intervention for Chinese American breast cancer survivors.

OBJECTIVE: Posttraumatic stress disorder (PTSD) is a significant condition and frequently observed among breast cancer survivors. Extant literature has demonstrated the effectiveness of expressive writing interventions in reducing PTSD among breast cancer survivors. However, little is known about how different PTSD symptom clusters influence each other over time during and after the expressive writing intervention among breast cancer survivors. We investigated how the three PTSD symptom clusters (reexperiencing, avoidance and hyperarousal) influence each other during and after an expressive writing intervention among Chinese American breast cancer survivors. METHODS: Chinese American breast cancer survivors (n = 136) completed an expressive writing intervention. Their PTSD symptoms were assessed at baseline, 1-, 3-, and 6-month follow-ups. RESULTS: Using cross-lagged panel analysis, the model with hyperarousal symptoms at each assessment wave predicting the subsequent severity of avoidance and reexperiencing symptoms indicated the best fit, χ2(52) = 65.422, p = .100; CFI = 0.990, RMSEA = 0.044, 95% CI [0.000, 0.074]. CONCLUSION: The results suggest that hyperarousal symptoms predict the subsequent severity of reexperiencing and avoidance symptoms over time during and after the expressive writing intervention. The findings highlight the importance of early diagnosis, monitoring and treatment of hyperarousal symptoms in enhancing the efficacy of PTSD interventions and reducing the chronicity in PTSD among Chinese American breast cancer survivors. Clinical Trial Registration atClinicalTrials.gov: NCT02946619.