The Relationship Between Three Sources of Social Support and Physical Activity Level in Middle-Aged and Older Adults.

This study examined how different sources of social support from family members (excluding partners), friends, and partners were associated with moderate and vigorous leisure-time physical activity (LTPA) among middle-aged and older adults. This study included married participants aged 45 or older (N = 2,155) from the Midlife in the United States secondary data set. Hierarchical linear regression was performed to investigate the relationship between the three sources of social support and moderate LTPA, and separately, with vigorous LTPA. Partner support (b = 0.19, p < .01), family support (b = -0.19, p < .01), and friend support (b = 0.26, p < .001) were all significantly associated with moderate LTPA. Only social support from friends was associated with vigorous LTPA (b = 0.24, p < .001). Our study emphasizes the significance of social support in influencing LTPA behaviors among middle-aged and older adults. Future programs promoting physical activity should incorporate social support from friends to have the greatest impact.

The impact of safety behavior, perceived risk, and workplace resources on COVID outcomes for U.S. Aircraft Rescue and Firefighting personnel.

BACKGROUND: Aircraft rescue and firefighting (ARFF) personnel are first responders located at airports in the United States who provide emergency response, mitigation, evacuation, and rescue of passengers and crew of aircraft at airports. The nature of their work puts ARFF personnel in close contact with travelers on a regular basis and at elevated risk for COVID-19 exposure. OBJECTIVE: In this study, we focused on safety behavior, perceived risk, and workplace resources to understand COVID-19 outcomes in the early pandemic among the overlooked worker population of ARFF personnel. The goal of this study was to examine how a self-reported positive COVID test were associated with safety behavior, perceived risk, and workplace resources. METHODS: Cross-sectional survey data were collected among ARFF personnel a year into the COVID-19 pandemic. RESULTS: Regression results showed that each additional unit increase in perceived susceptibility to COVID-19 was associated with a 133% increase in the odds of testing positive for COVID-19 (OR = 2.33, p <  0.05), and with each additional unit increase in perceived severity level, the odds of getting COVID-19 decreased by 47% (OR = 0.53, p <  0.05). CONCLUSIONS: Infection control among first responders may be improved by providing relevant information physical and emotional resources, and support that help shape perceptions of risk and adoption of prevention behaviors.

The Influence of Marriage and Cohabitation on Physical Activity Among Middle-Aged and Older People.

Using data from a nationally representative longitudinal study, Midlife in the United States (waves 1-3; N = 1113; aged 49-93), this study investigated whether partnered living status (partnered vs. non-partnered) and partnered living quality (support/strain from partner, partner disagreements) were associated with physical activity in middle-aged/older adults. Regressions were performed to test the effect of change or stability in partnered living status across three waves and relationship quality on the frequency of moderate and vigorous physical activity at Wave 3. Subjects who changed from non-partnered to partnered living had the highest moderate and vigorous physical activity levels. Partner support was positively associated with moderate physical activity (ß = .50, p < .01), and partner disagreement was negatively associated with vigorous physical activity (ß = -.27, p < .01). Results suggest that partnered living status and quality can influence physical activity among the aging population. Physical activity interventions among older adults may benefit from including social support as a key component.

Carboxyl-Alkyl Functionalized Conjugated Polyelectrolytes for High Performance Organic Electrochemical Transistors.

Contemporary design principles for organic mixed ionic electronic conductors (OMIECs) are mostly based on the ethylene glycol moiety, which may not be representative of the OMIEC class as a whole. Furthermore, glycolated polymers can be difficult to synthesize and process effectively. As an emerging alternative, we present a series of polythiophenes functionalized with a hybrid carboxyl-alkyl side chain. By variation of the alkyl spacer length, a comprehensive evaluation of both the impact of carboxylic acid functionalization and alkyl spacer length was conducted. COOH-functionalization endows the polymer with preferential intrinsic low-swelling behavior and water processability to yield solvent-resistant conjugated polyelectrolytes while retaining substantial electroactivity in aqueous environments. Advanced in situ techniques, including time-resolved spectroelectrochemistry and Raman spectroscopy, are used to interrogate the materials' microstructure, ionic-electronic coupling, and operational stability in devices. To compare these materials' performance to state-of-the-art technology for the design of OMIECs, we benchmarked the materials and demonstrated significant application potential in both planar and interdigitated organic electrochemical transistors (OECTs). The polythiophene bearing carboxyl-butyl side chains exhibits greater electrochemical performance and faster doping kinetics within the polymer series, with a record-high OECT performance among conjugated polyelectrolytes ([µC*]pOECT = 107 ± 4 F cm-1 V-1 s-1). The results provide an enhanced understanding of structure-property relationships for conjugated polyelectrolytes operating in aqueous media and expand the materials options for future OMIEC development. Further, this work demonstrates the potential for conjugated polymers bearing alkyl-COOH side chains as a path toward robust OMIEC designs that may facilitate further facile (bio)chemical functionalization for a range of (bio)sensing applications.