Longitudinal analysis of physical function in older adults: The effects of physical inactivity and exercise training.

Lack of exercise contributes to systemic inflammation and is a major cause of chronic disease. The long-term impact of initiating and sustaining exercise in late life, as opposed to sustaining a sedentary lifestyle, on whole-body health measures such as physical performance is not well known. This is an exploratory study to compare changes in physical performance among older adults initiating exercise late in life versus inactive older adults. Data from two observational cohorts were included in this analysis, representing two activity groups. The Active group cohort comprises older adults (n = 318; age 72.5 ± 7.2 years) enrolled in a supervised exercise program, "Gerofit." The inactive group comprises older adults (n = 146; age 74.5 ± 5.5 years) from the Italian study "Act on Ageing" (AOA) who self-reported being inactive. Participants in both groups completed physical performance battery at baseline and 1-year including: 6-min walk test, 30-s chair stand, and timed up-and-go. Two-sample t-tests measured differences between Gerofit and AOA at baseline and 1-year across all measures. Significant between-group effects were seen for all performance measures (ps = 0.001). The AOA group declined across all measures from baseline to 1 year (range -18% to -24% change). The Gerofit group experienced significant gains in function for all measures (range +10% to +31% change). Older adults who initiated routine, sustained exercise were protected from age-related declines in physical performance, while those who remained sedentary suffered cumulative deficits across strength, aerobic endurance, and mobility. Interventions to reduce sedentary behaviors and increase physical activity are both important to promote multi-system, whole-body health.

Physical Function Effects of Live Video Group Exercise Interventions for Older Adults: A Systematic Review and Veteran's Gerofit Group Case Study.

Background: Literature on telehealth interventions for older adults has been primarily on asynchronous interventions. During the COVID-19 pandemic, older adult exercise programs transitioned to an online format. This systematic review and case study examines the effectiveness of older adult live video exercise group interventions on physical health with insights from a Los Angeles VA program, Gerofit. Methods: PubMed was searched for live video older adult exercise groups from database inception to November 2021. All eligible studies included assessments of physical health and were limited to participants with an average age of 65 years or greater. Ten Veterans, who had participated in both in-person and virtual Gerofit sessions, were surveyed in the case study. Results: Nine studies met the inclusion criteria. Four studies included an equivalent in-person group as a comparator to the live video group and reported no significant between-group differences in outcomes, including energy expenditure and 6-minute walking distance test (6MWD). The other five studies reported statistically significant in-group improvement in outcomes including isokinetic knee strength. Case study participants reported similar attendance rates and perceived benefits, such as improved balance, when comparing virtual and in-person sessions. Discussion: Live video exercise groups in older adults demonstrated an improvement in physical function that was not statistically different from the comparison in-person sessions with the added benefit of averaging a higher attendance rate, providing initial support for the use of live video in older adult exercise programs. Insights from the case study supplement this by demonstrating older adults' positive attitude on these groups.

Cost and Quality of Life Outcomes of the STepped Exercise Program for Patients With Knee OsteoArthritis Trial.

OBJECTIVES: This study aimed to evaluate the cost-effectiveness of the randomized clinical trial STEP-KOA (STepped Exercise Program for patients with Knee OsteoArthritis). METHODS: The trial included 230 intervention and 115 control participants from 2 Veterans Affairs (VA) medical centers. A decision tree simulated outcomes for cohorts of patients receiving arthritis education (control) or STEP-KOA (intervention), which consisted of an internet-based exercise training program (step 1), phone counseling (step 2), and physical therapy (step 3) according to patient's response. Intervention costs were assessed from the VA perspective. Quality of life (QOL) was measured using 5-level EQ-5D US utility weights. Incremental cost-effectiveness ratios (ICERs) were calculated as the difference in costs divided by the difference in quality-adjusted life-years (QALYs) between arms at 9 months. A Monte Carlo probabilistic sensitivity analysis was used to generate a cost-effectiveness acceptability curve. RESULTS: The adjusted model found differential improvement in QOL utility weights of 0.042 (95% confidence interval 0.003-0.080; P=.03) for STEP-KOA versus control at 9 months. In the base case, STEP-KOA resulted in an incremental gain of 0.028 QALYs and an incremental cost of $279 per patient for an ICER of $10 076. One-way sensitivity analyses found the largest sources of variation in the ICER were the impact on QOL and the need for a VA-owned tablet. The probabilistic sensitivity analysis found a 98% probability of cost-effectiveness at $50 000 willingness-to-pay per QALY. CONCLUSIONS: STEP-KOA improves QOL and has a high probability of cost-effectiveness. Resources needed to implement the program will decline as ownership of mobile health devices increases.

The Sickle Cell Disease Functional Assessment (SCD-FA) tool: a feasibility pilot study.

BACKGROUND: The life expectancy for individuals with sickle cell disease (SCD) has greatly increased over the last 50 years. Adults with SCD experience multiple complications such as cardiopulmonary disease, strokes, and avascular necrosis that lead to limitations that geriatric populations often experience. There are no dedicated instruments to measure functional decline and functional age to determine risk of future adverse outcomes in older adults with SCD. The objective of this study was to assess the feasibility of performing the Sickle Cell Disease Functional Assessment (SCD-FA). METHODS: We enrolled 40 adults with SCD (20 younger adults aged 18-49 years as a comparison group and 20 older adults aged 50 years and older) in a single-center prospective cohort study. Participants were recruited from a comprehensive sickle cell clinic in an academic center in the southeastern United States. We included measures validated in an oncology geriatric assessment enriched with additional physical performance measures: usual gait speed, seated grip strength, Timed Up and Go, six-minute walk test, and 30-second chair stand. We also included an additional cognitive measure, which was the Montreal Cognitive Assessment, and additional patient-reported measures at the intersection of sickle cell disease and geriatrics. The primary outcome was the proportion completing the assessment. Secondary outcomes were the proportion consenting, duration of the assessment, acceptability, and adverse events. RESULTS: Eighty percent (44/55) of individuals approached consented, 91% (40/44) completed the SCD-FA in its entirety, and the median duration was 89 min (IQR 80-98). There were no identified adverse events. On the acceptability survey, 95% (38/40) reported the length as appropriate, 2.5% (1/40) reported a question as upsetting, and 5% (2/40) reported portions as difficult. Exploratory analyses of physical function showed 63% (25/40) had a slow usual gait speed (< 1.2 m/s). CONCLUSION: The SCD-FA is feasible, acceptable, and safe and physical performance tests identified functional impairments in adults with SCD. These findings will inform the next phase of the study where we will assess the validity of the SCD-FA to predict patient-important outcomes in a larger sample of adults with SCD.

Diet quality and exercise in older veterans with PTSD: a pilot study.

Older veterans with posttraumatic stress disorder (PTSD) are at increased risk of obesity and cardiometabolic disease. Physical activity and healthy eating are two behaviors that impact health, functional independence, and disease risk in later life, yet few studies have examined the relationship between PTSD and diet quality. This secondary analysis aimed to: (a) characterize the diet quality of older veterans with PTSD in comparison to U.S. dietary guidelines and (b) explore if participation in a supervised exercise intervention spurred simultaneous changes in dietary behavior. Diet quality was assessed with the Dietary Screener Questionnaire (DSQ), which measures daily intake of fiber, calcium, added sugar, whole grain, dairy, and fruits/vegetables/legumes. The sample included 54 military veterans ≥ 60 years old with PTSD who participated in a randomized controlled pilot trial comparing 12 weeks of supervised exercise (n = 36) to wait-list usual care (n = 18). The DSQ was administered at baseline and 12 weeks. Consumption of added sugar exceeded U.S. dietary guideline recommendations and consumption of whole grains, fruits/vegetables/legumes, fiber, calcium, and dairy fell short. Participation in the supervised exercise intervention was not associated with changes in diet quality. Results revealed that the diet quality of older veterans with PTSD is poor, and while the exercise intervention improved health through exercise, it did not make veterans any more likely to adopt a more healthful diet. Interventions targeting diet, or diet + exercise, are needed to manage the increased risk of obesity and cardiometabolic disease present in older veterans with PTSD.

Older veterans with posttraumatic stress disorder (PTSD) are at risk for several physical health conditions that reduce their quality of life. Physical activity and healthy eating are important behaviors for promoting good health and physical function in later life. The purpose of this study was to examine the diet quality of older veterans with PTSD and explore whether a program designed to increase exercise also improved diet. Diet quality was measured with a self-report survey, the Dietary Screener Questionnaire (DSQ), which measures daily intake of fiber, calcium, added sugar, whole grain, dairy, and fruits/vegetables/legumes. Study participants were 54 military veterans age 60 years and older with PTSD who participated in a randomized controlled pilot trial comparing 12 weeks of supervised exercise to wait-list usual care. The DSQ was administered at baseline and 12 weeks post intervention. Results show that older veterans with PTSD have overall poor diet quality that included consuming too much added sugar and not enough whole grains, fruits/vegetables/legumes, fiber, calcium, and dairy. Participation in the supervised exercise did not lead to simultaneous diet quality changes over 12 weeks. This study shows that diet quality is poor in older veterans with PTSD and future programs are needed to target this health behavior.

Reliability of Virtual Physical Performance Assessments in Veterans During the COVID-19 Pandemic.

OBJECTIVE: To determine the reliability of 3 physical performance tests performed via a telehealth visit (30-s arm curls test, 30-s chair stand test, 2-min step test) among community-dwelling older veterans. DESIGN: Cross sectional study. SETTING: Virtual. PARTICIPANTS: Veterans (N=55; mean age 75y) who enrolled in Gerofit, a virtual group exercise program. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Participants were tested by 2 different assessors at 1 time point. The intraclass correlation coefficient (ICC) with 95% confidence intervals and Bland-Altman plots were used as measures of reliability. To assess generalizability, ICCs were further evaluated by health conditions (type 2 diabetes, arthritis, obesity, depression). RESULTS: Assessments were conducted among 55 participants. The ICC was above 0.98 for all 3 tests across health conditions and Bland-Altman plots indicated that there were no significant systematic errors in the measurement. CONCLUSIONS: The virtual physical performance measures appear to have high reliability and the findings are generalizable across health conditions among veterans. Thus, they are reliable for evaluating physical performance in older veterans in virtual settings.

Towards "mobility is medicine": Socioecological factors and hospital mobility in older adults.

BACKGROUND: Understanding the factors that influence hospital mobility, especially in the context of a heightened focus on falls prevention, is needed to improve care. OBJECTIVE: This qualitative study uses a socioecological framework to explore factors that influence hospital mobility in older adults. DESIGN: Qualitative research PARTICIPANTS: Semi-structured interviews and focus groups were conducted with medically-ill hospitalized older adults (n = 19) and providers (hospitalists, nurses, and physical and occupational therapists (n = 48) at two hospitals associated with an academic health system. APPROACH: Interview and focus group guides included questions on perceived need for mobility, communication about mobility, hospital mobility culture, and awareness of patients' walking activity. Data were analyzed thematically and mapped onto the constructs of the socioecological model. KEY RESULTS: A consistent theme among patients and providers was that "mobility is medicine." Categories of factors reported to influence hospital walking activity included intrapersonal factors (patients' health status, fear of falls), interpersonal factors (patient-provider communication about mobility), organizational factors (clarity about provider roles and responsibilities, knowledge of safe patient handling, reliance on physical therapy for mobility), and environmental factors (falls as a never event, patient geographical locations on hospital units). Several of these factors were identified as potentially modifiable targets for intervention. Patients and providers offered recommendations for improving awareness of patient's ambulatory activity, assigning roles and responsibility for mobility, and enhancing education and communication between patients and providers across disciplines. CONCLUSION: Patients and providers identified salient factors for future early mobility initiatives targeting hospitalized older adults. Consideration of these factors across all stages of intervention development and implementation will enhance impact and sustainability.

Assessing Moderate to Vigorous Physical Activity in Older Adults: Validity of a Commercial Activity Tracker.

Purpose: Despite the potential for commercial activity devices to promote moderate to vigorous physical activity (MVPA), limited information is available in older adults, a high-priority target population with unique gait dynamics and energy expenditure. The study purpose was to investigate the content validity of the Garmin Vivosmart HR device for step counts and MVPA in adults ≥65 years of age in free-living conditions. Methods: Thirty-five participants (M age= 73.7 (6.3) years) wore Garmin and ActiGraph GT3X+ devices for a minimum of 2 days. Accuracy and intra-person reliability were tested against a hip worn ActiGraph device. Separate analyses were conducted using different accelerometer cut-off values to define MVPA, a population-based threshold (≥2,020 counts/minute) and a recommended threshold for older adults (≥1,013 counts/minute). Results: Overall, the Garmin device overestimated MVPA compared with the hip-worn ActiGraph. However, the difference was small using the lower, age-specific, MVPA cut-off value [median (IQR) daily minutes; 50(85) vs. 32(49), p = 0.35] in contrast to the normative standard (50(85) vs. 7(24), p < 0.001). Regardless of the MVPA cut-off, intraclass correlation showed poor reliability [ICC (95% CI); 0.16(-0.40, 0.55) to 0.35(-0.32, 0.7)] which was supported by Bland-Altman plots. Garmin step count was both accurate (M step difference: 178.0, p = 0.22) and reliable [ICC (95% CI; 0.94) (0.88, 0.97)]. Conclusion: Results support the accuracy of a commercial activity device to measure MVPA in older adults but further research in diverse patient populations is needed to determine clinical utility and reliability over time.

PTSD Improvement Associated with Social Connectedness in Gerofit Veterans Exercise Program.

OBJECTIVE: Post-traumatic stress disorder (PTSD) is common in Veterans. Symptoms can perpetuate into late life, negatively impacting physical and mental health. Exercise and social support are beneficial in treating anxiety disorders such as PTSD in the general population, although less is known about the impact on Veterans who have lived with PTSD for decades. This study assessed associations between social connectedness, physical function and self-reported change in PTSD symptoms among older Veterans specifically participating in Gerofit. DESIGN: Prospective clinical intervention. SETTING: Twelve sites of Veterans Affairs (VA) Gerofit exercise program across the United States. PARTICIPANTS: Three hundred and twenty one older Veteran Gerofit participants (mean age = 74) completed physical assessments and questionnaires regarding physical and emotional symptoms and their experience. MEASUREMENTS: Measures of physical function, including 30-second chair stands, 10-m and 6-min walk were assessed at baseline and 3 months; change in PTSD symptoms based on the Diagnostic Statistical Manual-5 (DSM-5) assessed by a self-report questionnaire; and social connection measured by the Relatedness Subscale of the Psychological Need Satisfaction in Exercise scale (PNSE) were evaluated after 3 months of participation in Gerofit. RESULTS: Ninety five (29.6%) Veterans reported PTSD. Significant improvement was noted in self-rated PTSD symptoms at 3 months (P < .05). Moderate correlation (r = .44) was found between social connectedness with other participants in Gerofit and PTSD symptom improvement for those Veterans who endorsed improvement (n = 59). All participants improved on measures of physical function. In Veterans who endorsed PTSD there were no significant associations between physical function improvement and PTSD symptoms. CONCLUSION: Veterans with PTSD that participated in Gerofit group exercise reported symptom improvement, and social connectedness was significantly associated with this improvement. In addition to physical health benefits, the social context of Gerofit may offer a potential resource for improving PTSD symptoms in older Veterans that warrants further study.

Stepped Exercise Program for Patients With Knee Osteoarthritis : A Randomized Controlled Trial.

BACKGROUND: Evidence-based models are needed to deliver exercise-related services for knee osteoarthritis efficiently and according to patient needs. OBJECTIVE: To examine a stepped exercise program for patients with knee osteoarthritis (STEP-KOA). DESIGN: Randomized controlled trial. (ClinicalTrials.gov: NCT02653768). SETTING: 2 U.S. Department of Veterans Affairs sites. PARTICIPANTS: 345 patients (mean age, 60 years; 15% female; 67% people of color) with symptomatic knee osteoarthritis. INTERVENTION: Participants were randomly assigned in a 2:1 ratio to STEP-KOA or an arthritis education (AE) control group, respectively. The STEP-KOA intervention began with 3 months of an internet-based exercise program (step 1). Participants who did not meet response criteria for improvement in pain and function after step 1 progressed to step 2, which involved 3 months of biweekly physical activity coaching calls. Participants who did not meet response criteria after step 2 went on to in-person physical therapy visits (step 3). The AE group received educational materials via mail every 2 weeks. MEASUREMENTS: Primary outcome was Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) score. Scores for the STEP-KOA and AE groups at 9 months were compared by using linear mixed models. RESULTS: In the STEP-KOA group, 65% of participants (150 of 230) progressed to step 2 and 35% (81 of 230) to step 3. The estimated baseline WOMAC score for the full sample was 47.5 (95% CI, 45.7 to 49.2). At 9-month follow-up, the estimated mean WOMAC score was 6.8 points (CI, -10.5 to -3.2 points) lower in the STEP-KOA than the AE group, indicating greater improvement. LIMITATION: Participants were mostly male veterans, and follow-up was limited. CONCLUSION: Veterans in STEP-KOA reported modest improvements in knee osteoarthritis symptoms compared with the control group. The STEP-KOA strategy may be efficient for delivering exercise therapies for knee osteoarthritis. PRIMARY FUNDING SOURCE: Department of Veterans Affairs, Health Services Research and Development Service.

Geriatric assessment for older adults with sickle cell disease: protocol for a prospective cohort pilot study.

BACKGROUND: The life expectancy for people with sickle cell disease (SCD) has improved tremendously over the last 50 years. This population experiences hemolysis and vaso-occlusion in multiple organs that lead to complications such as cardiopulmonary disease, strokes, and avascular necrosis. These complications can limit mobility and aerobic endurance, similar to limitations that often occur in geriatric populations. These sickle-cell and age-related events lead to frequent hospitalization, which further increases the risk of functional decline. We have few tools to measure functional decline in people with SCD. The purpose of this paper is to describe a protocol to evaluate the feasibility of sickle cell disease geriatric assessment (SCD-GA). METHODS/DESIGN: We will enroll 40 adults with SCD (20 age 18-49.99 years and 20 age ≥ 50 years) in a prospective cohort study to assess the feasibility of SCD-GA. The SCD-GA includes validated measures from the oncology geriatric assessment enriched with additional physical and cognitive measures. The SCD-GA will be performed at the first study visit, at 10 to 20 days after hospitalization, and at 12 months (exit visit). With input from a multidisciplinary team of sickle cell specialists, geriatricians, and experts in physical function and physical activity, we selected assessments across 7 domains: functional status (11 measures), comorbid medical conditions (1 measure), psychological state (1 measure), social support (2 measures), weight status (2 measures), cognition (3 measures), and medications (1 measure). We will measure the proportion completing the assessment with feasibility as the primary outcome. Secondary outcomes include the proportion consenting and completing all study visits, duration of the assessment, acceptability, and adverse events. DISCUSSION: We present the protocol and rationale for selection of the measures included in SCD-GA. We also outline the methods to determine feasibility and subsequently to optimize the SCD-GA in preparation for a larger multicenter validation study of the SCD-GA.

Impact of Supervised Exercise on One-Year Medication Use in Older Veterans with Multiple Morbidities.

Exercise is touted as the ideal prescription to treat and prevent many chronic diseases. We examined changes in utilization and cost of medication classes commonly prescribed in the management of chronic conditions following participation in 12-months of supervised exercise within the Veterans Affairs Gerofit program. Gerofit enrolled 480 veterans between 1999 and 2017 with 12-months participation, with 453 having one or more active prescriptions on enrollment. Active prescriptions overall and for five classes of medications were examined. Changes from enrollment to 12 months were calculated, and cost associated with prescriptions filled were used to estimate net cost changes. Active prescriptions were reduced for opioids (77 of 164, 47%), mental health (93 of 221, 42%), cardiac (175 of 391, 45%), diabetes (41 of 166, 25%), and lipid lowering (56 of 253, 22%) agents. Cost estimates resulted in a net savings of $38,400. These findings support the role of supervised exercise as a favorable therapeutic intervention that has impact across chronic conditions.

Rapid Transition to Telehealth Group Exercise and Functional Assessments in Response to COVID-19.

Exercise is critical for health maintenance in late life. The COVID-19 shelter in place and social distancing orders resulted in wide-scale interruptions of exercise therapies, placing older adults at risk for the consequences of decreased mobilization. The purpose of this paper is to describe rapid transition of the Gerofit facility-based group exercise program to telehealth delivery. This Gerofit-to-Home (GTH) program continued with group-based synchronous exercise classes that ranged from 1 to 24 Veterans per class and 1 to 9 classes offered per week in the different locations. Three hundred and eight of 1149 (27%) Veterans active in the Gerofit facility-based programs made the transition to the telehealth delivered classes. Participants' physical performance testing continued remotely as scheduled with comparisons between most recent facility-based and remote testing suggesting that participants retained physical function. Detailed protocols for remote physical performance testing and sample exercise routines are described. Translation to remote delivery of exercise programs for older adults could mitigate negative health effects.

Developing Predictors of Long-Term Adherence to Exercise Among Older Veterans and Spouses.

Behavior change theory was used to explore predictors of long-term adherence (≥2 years) to exercise. A retrospective analysis of data from participants (N = 97) who reached a 6-month follow-up, which served as the baseline, was evaluated for completion of yearly follow-up surveys. Variables examined at baseline, which included age, race, gender, body mass index (BMI), and self-report of comorbidities, symptoms, physical function, and a Barriers Specific Self-Efficacy Scale, were examined with significance set at p < .05. Lower BMI (29.1 ± 5.1 vs. 31.6 ± 6.5, p = .047) and higher self-efficacy to overcome environmental barriers (p = .016) and social isolation (p = .05) were associated with long-term adherence. Self-efficacy to overcome environmental and social barriers, such as inclement weather, access to exercise site, and opportunities for group-based exercise, should be addressed to promote long-term adherence to exercise among older adults.

Pilot randomized controlled trial of exercise training for older veterans with PTSD.

Exercise training positively impacts mental health, yet remains untested in older adults with posttraumatic stress disorder (PTSD). We conducted a randomized controlled pilot trial to test the feasibility and acceptability of exercise training in older veterans with PTSD. Fifty-four veterans ≥ 60 years, with a DSM-V diagnosis of PTSD, were randomized to supervised exercise (n = 36) or wait-list (WL; n = 18). Primary outcomes included recruitment rates, attendance, satisfaction, and retention. Secondary outcomes included changes in PTSD symptoms, depression, health-related quality of life, and sleep quality; assessed at baseline and 12 weeks. There were no adverse events. Attrition was minimal (14%), and adherence to the exercise intervention was high (82%). Clinically significant improvements in PTSD and related conditions were observed following exercise (Cohen's d = 0.36-0.81). Exercise training is safe and acceptable in older adults with PTSD, may improve PTSD symptoms, and broadly impacts PTSD-related conditions. Future definitive trials are warranted.

Physical Activity in the Hospital: Documentation and Influence on Venous Thromboembolism Prophylaxis.

This study describes the availability of physical activity information in the electronic health record, explores how electronic health record documentation correlates with accelerometer-derived physical activity data, and examines whether measured physical activity relates to venous thromboembolism (VTE) prophylaxis use. Prospective observational data comes from community-dwelling older adults admitted to general medicine (n = 65). Spearman correlations were used to examine association of accelerometer-based daily step count with documented walking distance and with duration of VTE prophylaxis. Only 52% of patients had documented walking in nursing and/or physical therapy/occupational therapy notes during the first three hospital days. Median daily steps recorded via accelerometer was 1,370 (interquartile range = 854, 2,387) and correlated poorly with walking distance recorded in physical therapy/occupational therapy notes (median 33 feet/day [interquartile range = 12, 100]; r = .24; p = .27). Activity measures were not associated with use or duration of VTE prophylaxis. VTE prophylaxis use does not appear to be directed by patient activity, for which there is limited documentation.

An innovative educational clinical experience promoting geriatric exercise.

Formal educational training in physical activity promotion is relatively sparse throughout the medical education system. The authors describe an innovative clinical experience in physical activity directed at medical clinicians on a geriatrics rotation. The experience consists of a single 2 1/2 hour session, in which learners are partnered with geriatric patients engaged in a formal supervised exercise program. The learners are guided through an evidence-based exercise regimen tailored to functional status. This experience provides learners with an opportunity to interact with geriatric patients outside the hospital environment to counterbalance the typical geriatric rotation in which geriatric patients are often seen in clinics or hospitals. In this experience, learners are exposed to fit and engaged geriatric patients successfully living in the community despite chronic or disabling conditions. A survey of 105 learners highlighted positive responses to the experience, with 96% of survey respondents indicating that the experience increased their confidence in their ability to serve as advocates for physical activity for older adults, and 89.5% of responders to a follow-up survey indicating that the experience changed their perception of geriatric patients. Modifications to the experience, implemented at partnering facilities are described. The positive feedback from this experience warrants consideration for implementation in other settings.

Accelerometer-Measured Hospital Physical Activity and Hospital-Acquired Disability in Older Adults.

BACKGROUND: Hospital-acquired disability (HAD) is common and often related to low physical activity while in the hospital. OBJECTIVE: To examine whether wearable hospital activity trackers can be used to predict HAD. DESIGN: A prospective observational study between January 2016 and March 2017. SETTING: An academic medical center. PARTICIPANTS: Community-dwelling older adults, aged 60 years or older, enrolled within 24 hours of admission to general medicine (n = 46). MAIN MEASURES: Primary outcome was HAD, defined as having one or more new activity of daily living deficits, decline of four or greater on the Late-Life Function and Disability Instrument (calculated between baseline and discharge), or discharge to a skilled nursing facility. Hospital activity (mean active time, mean sedentary time, and mean step counts per day) was measured using ankle-mounted accelerometers. The association of the literature-based threshold of 900 steps/day with HAD was also evaluated. RESULTS: Mean age was 73.2 years (SD = 9.5 years), 48% were male, and 76% were white. Median length of stay was 4 days (interquartile range [IQR] = 2.0-6.0 days); 61% (n = 28) reported being able to walk without assistance of another person or walking aid at baseline. Median daily activity time and step counts were 1.1 h/d (IQR = 0.7-1.7 h/d) and 1455.7 steps/day (IQR = 908.5-2643 steps/day), respectively. Those with HAD (41%; n = 19) had lower activity time (0.8 vs 1.4 h/d; P = .04) and fewer step counts (1186 vs 1808 steps/day; P = .04), but no difference in sedentary time, compared to those without HAD. The 900 steps/day threshold had poor sensitivity (40%) and high specificity (85%) for detecting HAD. CONCLUSIONS: Low hospital physical activity, as measured by wearable accelerometers, is associated with HAD. Clinicians can utilize wearable technology data to refer patients to physical/occupational therapy services or other mobility interventions, like walking programs. J Am Geriatr Soc 68:261-265, 2020.

Warrior Wellness: A Randomized Controlled Pilot Trial of the Effects of Exercise on Physical Function and Clinical Health Risk Factors in Older Military Veterans With PTSD.

BACKGROUND: Military veterans living with post-traumatic stress disorder (PTSD) face significant physical and functional health disparities, which are often aggravated over time and in the context aging. Evidence has shown that physical activity can positively impact age-related health conditions, yet exercise trials in older adults with mental disorders are rare. Our study was a tailored and targeted pilot exercise intervention for older veterans with PTSD. METHODS: Fifty-four older veterans with PTSD (mean age = 67.4 years, 90.7% male, 85.2% non-white) were randomized to supervised exercise (n = 38) or wait-list usual care (n = 18) for 12 weeks. Physical activity (MET-min/wk) and aerobic endurance (assessed with the 6-minute walk test) were primary outcomes. Secondary outcomes were physical performance (strength, mobility, balance), cardiometabolic risk factors (eg, waist circumference), and health-related quality of life. RESULTS: At 12 weeks, a large effect of the intervention on physical activity levels (Cohen's d = 1.37) was observed compared to wait-list usual care. Aerobic endurance improved by 69 m in the exercise group compared to 10 m in wait-list group, reflecting a moderate between-group effect (Cohen's d = 0.50). Between-group differences on 12-week changes in physical performance, cardiometabolic risk factors, and health-related quality of life ranged from small to large effects (Cohen's d = 0.28-1.48), favoring the exercise arm. CONCLUSION: Participation in supervised exercise improved aerobic endurance, physical performance, and health-related clinical factors in older veterans with PTSD; a medically complex population with multiple morbidity. Group exercise is a low-cost, low-stigma intervention, and implementation efforts among older veterans with PTSD warrants further consideration.

Association of Neurocognitive and Physical Function With Gait Speed in Midlife.

Importance: Gait speed is a well-known indicator of risk of functional decline and mortality in older adults, but little is known about the factors associated with gait speed earlier in life. Objectives: To test the hypothesis that slow gait speed reflects accelerated biological aging at midlife, as well as poor neurocognitive functioning in childhood and cognitive decline from childhood to midlife. Design, Setting, and Participants: This cohort study uses data from the Dunedin Multidisciplinary Health and Development Study, a population-based study of a representative 1972 to 1973 birth cohort in New Zealand that observed participants to age 45 years (until April 2019). Data analysis was performed from April to June 2019. Exposures: Childhood neurocognitive functions and accelerated aging, brain structure, and concurrent physical and cognitive functions in adulthood. Main Outcomes and Measures: Gait speed at age 45 years, measured under 3 walking conditions: usual, dual task, and maximum gait speeds. Results: Of the 1037 original participants (91% of eligible births; 535 [51.6%] male), 997 were alive at age 45 years, of whom 904 (90.7%) had gait speed measured (455 [50.3%] male; 93% white). The mean (SD) gait speeds were 1.30 (0.17) m/s for usual gait, 1.16 (0.23) m/s for dual task gait, and 1.99 (0.29) m/s for maximum gait. Adults with more physical limitations (standardized regression coefficient [ß], -0.27; 95% CI, -0.34 to -0.21; P < .001), poorer physical functions (ie, weak grip strength [ß, 0.36; 95% CI, 0.25 to 0.46], poor balance [ß, 0.28; 95% CI, 0.21 to 0.34], poor visual-motor coordination [ß, 0.24; 95% CI, 0.17 to 0.30], and poor performance on the chair-stand [ß, 0.34; 95% CI, 0.27 to 0.40] or 2-minute step tests [ß, 0.33; 95% CI, 0.27 to 0.39]; all P < .001), accelerated biological aging across multiple organ systems (ß, -0.33; 95% CI, -0.40 to -0.27; P < .001), older facial appearance (ß, -0.25; 95% CI, -0.31 to -0.18; P < .001), smaller brain volume (ß, 0.15; 95% CI, 0.06 to 0.23; P < .001), more cortical thinning (ß, 0.09; 95% CI, 0.02 to 0.16; P = .01), smaller cortical surface area (ß, 0.13; 95% CI, 0.04 to 0.21; P = .003), and more white matter hyperintensities (ß, -0.09; 95% CI, -0.15 to -0.02; P = .01) had slower gait speed. Participants with lower IQ in midlife (ß, 0.38; 95% CI, 0.32 to 0.44; P < .001) and participants who exhibited cognitive decline from childhood to adulthood (ß, 0.10; 95% CI, 0.04 to 0.17; P < .001) had slower gait at age 45 years. Those with poor neurocognitive functioning as early as age 3 years had slower gait in midlife (ß, 0.26; 95% CI, 0.20 to 0.32; P < .001). Conclusions and Relevance: Adults' gait speed is associated with more than geriatric functional status; it is also associated with midlife aging and lifelong brain health.