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Prior work, primarily focusing on habitual gait velocity, has demonstrated a cost while walking when coupled with a cognitive task. The cost of dual-task walking is exacerbated with age and complexity of the cognitive or motor task. However, few studies have examined the dual-task cost associated with maximal gait velocity. Thus, this cross-sectional study examined age-related changes in dual-task (serial subtraction) walking at two velocities. Participants were classified by age: young-old (45–64 years), middle-old (65–79 years), and oldest-old (≥80 years). They completed single- and dual-task walking trials for each velocity: habitual (N = 217) and maximal (N = 194). While no significant Group × Condition interactions existed for habitual or maximal gait velocities, the main effects for both condition and age groups were significant (p <.01). Maximal dual-task cost (p =.01) was significantly greater in the oldest-old group. With age, both dual-task velocities decreased. Maximal dual-task cost was greatest for the oldest-old group. [ABSTRACT FROM AUTHOR]

Lower-body power measured by a linear position transducer during the sit-to-stand (STS) movement declines with age and may be a predictor of physical disability in older adults. The purpose of this study was to establish normative data for STS power across the lifespan and to determine if differences exist between age cohorts, sexes, and age cohort–sex subgroups. Adults (N = 557) aged 18–89 were divided into five age cohorts and performed the STS connected to a linear position transducer, which calculated power and velocity during the movement. Significantly lower (p <.01) velocity was observed in a younger age cohort in females than males, whereas males saw a significant average power decrement (p <.01) in a younger age cohort than females. STS power norms give clinicians a metric predicting physical disability and may be of particular interest to males as their power production begins to decline at an earlier age. [ABSTRACT FROM AUTHOR]

Background: Alzheimer's disease and related dementias (ADRD) imposed an estimated financial cost to Americans of $355 billion in 2021 and is projected to rise to $1.1 trillion by 2050. ADRD affects more than 6 million Americans and is expected to rise to more than 13 million by 2050. Health coaching (HC) interventions improve many lifestyle factors also known to be protective against ADRD; however, their ability to provide protection in individuals at‐risk for developing cognitive decline is unknown. The purpose of the present investigation was to examine the effect of HC intervention adherence on ADRD protective factor score after 4 months. Method: Adults aged 45‐75 years (n = 104) with at least two ADRD risk factors and a maximum of one protective factor participated in this study. Participants completed the Australian National University Alzheimer's Disease Risk Index (ANU‐ADRI) both before and after a 4‐month HC protocol focusing on reducing modifiable risk factors for ADRD in six domains (diet, exercise, sleep, stress, social engagement, and cognitive activity). Participants who completed a number of check‐ins with the health coach greater than the group mean (5.6 check‐ins) were placed in the high adherence (HA) group, and individuals with fewer were placed in the low adherence (LA) group. A mixed factorial ANOVA was conducted to determine if there was a difference in pre‐ and post‐ANU‐ADRI overall protective factor score. Result: After the 4‐month HC intervention, ANU‐ADRI scores did not change overall in the pooled sample (F(1,102) = 1.45, p =.23). However, a significant adherence*time interaction effect indicated that HA improved overall protective factor score significantly more than LA (F(1,102) = 4.85, p =.03), and pairwise comparisons revealed that protective factor scores improved only in the HA group (p =.02 for HA versus p =.47 for LA). Conclusion: These results indicate an HC intervention may effect behaviors and emotional states understood to be ADRD protective factors when adherence with the protocol is high. This has the potential to improve the quality of life for individuals at‐risk for ADRD. Further investigation will shed light on whether the ADRD protection derived from HC is iterative and durable. [ABSTRACT FROM AUTHOR]

Background: A growing body of research has examined lifestyle-based interventions for dementia prevention. Specifically, health coaching interventions have been linked to decreased risk of Alzheimer disease (AD) comorbidities, such as diabetes. Despite the association, there is a lack of research examining the efficacy and perception of digital health coaching on reducing AD risk. Understanding the perceived benefits of participating in a digital health coach program is critical to ensure long-term use, including participant adherence and engagement., Objective: The purpose of this study is to examine the initial attitudes toward a digital health coaching intervention aimed at preventing cognitive decline among at-risk, rural participants., Methods: This exploratory qualitative study is part of the ongoing Digital Cognitive Multidomain Alzheimer Risk Velocity Study (DC-MARVel; ClinicalTrials.gov NCT04559789), a 2-year randomized control trial examining the effects of a digital health coaching intervention on dementia risk, cognitive decline, and general health outcomes. Participants were recruited from the northwest region of Arkansas via word of mouth, email, local radio, and social media. At the time of the analysis, 103 participants randomly assigned to the health coaching group completed an average of 4 coaching sessions over a 4-month period. The intervention included asynchronous messages 1-2 times per week from their health coach that contained health education articles based on the participant's goals (eg, increase physical activity), unlimited access to their coach for questions and recommendations, and monthly meetings with their coach via videoconference or phone to discuss their goals. Participants were asked 2 open-ended questions, "What were your top 1 or 2 takeaways from your recent Health Coaching session?" and "Is there anything you would change about our Health Coaching sessions?" A thematic analysis was conducted using feedback responses from 80 participants (mean age, SD 7.6 years)., Results: The following four themes emerged from participants' feedback: (1) healthy lifestyle and behavioral changes, (2) a sense of self-awareness through introspection, (3) value in coach support, and (4) a desire for a change in program format (eg, frequency). In total, 93% (n=74) of participants expressed that the intervention needed no changes., Conclusions: Initial participation in the digital cognitive health coaching intervention was well received, as evidenced by participants reporting value in goal setting and strategies for healthy lifestyle and behavioral changes as well as self-reflection on their personal lifestyle choices. Feedback about their assigned coach also offers insight into the importance of the coach-participant relationship and may serve as a significant factor in overall participant success. Given the exploratory nature of this study, more robust research is needed to elicit more information from participants about their experiences to fully understand the acceptability of the digital health coaching intervention., Trial Registration: ClinicalTrials.gov NCT04559789; https://clinicaltrials.gov/show/NCT04559789., International Registered Report Identifier (irrid): RR2-10.2196/31841., (©Jennifer Rae Myers, Kelsey N Bryk, Erica N Madero, Jacob McFarlane, Anthony Campitelli, Joshua Gills, Megan Jones, Sally Paulson, Michelle Gray, Jordan M Glenn. Originally published in JMIR Formative Research (https://formative.jmir.org), 22.07.2024.)