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Biomedical subjects

David M Buchner

Publications and source records attributed to David M Buchner.

9 recordsLinked to original sources
PubMed2006

Results of the first year of active for life: translation of 2 evidence-based physical activity programs for older adults into community settings.

OBJECTIVES: Translating efficacious interventions into practice within community settings is a major public health challenge. We evaluated the effects of 2 evidence-based physical activity interventions on self-reported physical activity and related outcomes in midlife and older adults. METHODS: Four community-based organizations implemented Active Choices, a 6-month, telephone-based program, and 5 implemented Active Living Every Day, a 20-week, group-based program. Both programs emphasize behavioral skills necessary to become more physically active. Participants completed pretest and posttest surveys. RESULTS: Participants (n=838) were aged an average of 68.4 +/-9.4 years, 80.6% were women, and 64.1% were non-Hispanic White. Seventy-two percent returned posttest surveys. Intent-to-treat analyses found statistically significant increases in moderate-to-vigorous physical activity and total physical activity, decreases in depressive symptoms and stress, increases in satisfaction with body appearance and function, and decreases in body mass index. CONCLUSIONS: The first year of Active for Life demonstrated that Active Choices and Active Living Every Day, 2 evidence-based physical activity programs, can be successfully translated into community settings with diverse populations. Further, the magnitudes of change in outcomes were similar to those reported in the efficacy trials.

Aged↗
PubMed2005

Best practices for physical activity programs and behavior counseling in older adult populations.

Physical activity offers one of the greatest opportunities for people to extend years of active independent life and reduce functional limitations. The article identifies key practices for promoting physical activity in older adults, with a focus on those with chronic disease or low fitness and those with low levels of physical activity. Key practices identified: (a) A multidimensional activity program that includes endurance, strength, balance, and flexibility training is optimal for health and functional benefits; (b) principles of behavior change including social support, self-efficacy, active choices, health contracts, assurances of safety, and positive reinforcement enhance adherence; (c) manage risk by beginning at low intensity but gradually increasing to moderate physical activity, which has a better risk:benefit ratio and should be the goal for older adults; (d) an emergency procedure plan is prudent for community-based programs; and (e) monitoring aerobic intensity is important for progression and motivation. Selected content review of physical activity programming from major organizations and institutions is provided.

Aged↗
PubMed2004

The effects of multidimensional home-based exercise on functional performance in elderly people.

BACKGROUND: This study tested the hypothesis that a home-based exercise program would improve functional performance in elderly people. METHODS: We conducted a 6-month, single-blinded, randomized controlled trial. 72 community dwelling men and women (aged >/=70 years) with self-reported and laboratory-based functional impairment were recruited for the study. Participants were randomly assigned to either a home-based progressive strength, balance, and general physical activity intervention or an attention-control group that received home-based nutrition education. Functional performance was measured in the laboratory using the Physical Performance Test (PPT) and the Established Populations for Epidemiologic Studies of the Elderly (EPESE) short physical performance battery. Physiologic capacity was measured by strength (one repetition maximum), dynamic balance (tandem walk), gait speed (2-meter walk), and cardiovascular endurance (6-minute walk). RESULTS: 70 participants (97%) completed the 6-month trial. Compliance with study interventions within each group ranged from 75% in controls to 82% in exercisers. PPT increased by 6.1 +/- 13.4% in exercisers and decreased by 2.8 +/- 13.6% in controls (p =.02). EPESE improved by 26.2 +/- 37.5% in exercisers and decreased by 1.2 +/- 22.1% in controls (p =.001). Dynamic balance improved by 33.8 +/- 14.4% in exercisers versus 11.5 +/- 23.7% in controls (p =.0002). There were no differences between groups in the change in strength, gait speed, or cardiovascular endurance. CONCLUSIONS: Minimally supervised exercise is safe and can improve functional performance in elderly individuals. The improvements in functional performance occurred along with improvements in balance but without a significant change in muscle strength or endurance.

Activities of Daily Living↗
PubMed2004

Footwear style and risk of falls in older adults.

OBJECTIVES: To determine how the risk of a fall in an older adult varies in relation to style of footwear worn. DESIGN: Nested case-control study. SETTING: Group Health Cooperative, a large health maintenance organization in Washington state. PARTICIPANTS: A total of 1,371 adults aged 65 and older were monitored for falls over a 2-year period; 327 qualifying fall cases were compared with 327 controls matched on age and sex. MEASUREMENTS: Standardized in-person examinations before fall occurrence, interviews about fall risk factors after the fall occurred, and direct examination of footwear were conducted. Questions for controls referred to the last time they engaged in an activity broadly similar to what the case was doing at the time of the fall. RESULTS: Athletic and canvas shoes (sneakers) were the styles of footwear associated with lowest risk of a fall. Going barefoot or in stocking feet was associated with sharply increased risk, even after controlling for measures of health status (adjusted odds ratio=11.2, 95% confidence interval (CI)=2.4-51.8). Relative to athletic/canvas shoes, other footwear was associated with a 1.3-fold increase in the risk of a fall (95% CI=0.9-1.9), varying somewhat by style. CONCLUSION: Contrary to findings from gait-laboratory studies, athletic shoes were associated with relatively low risk of a fall in older adults during everyday activities. Fall risk was markedly increased when participants were not wearing shoes.

Accidental Falls↗
PubMed2004

Biomechanical properties of shoes and risk of falls in older adults.

OBJECTIVES: To determine the relationships between the biomechanical properties of shoes worn in a cohort of healthy older adults and the risk of falling. DESIGN: Nested case-control study, comparing biomechanical measurements of shoes worn by those who reported a fall with measurements of shoes worn by age- and sex-matched nonfallers engaged in broadly similar activities. SETTING: On-site measurements where falls occurred. PARTICIPANTS: A cohort of 1,371 older adults, of whom 327 reported a fall and 327 served as age- and sex-matched controls. MEASUREMENTS: Shoe measurements related to lateral stability (heel height and width, critical tipping angle), foot position sense (heel-collar height, sole thickness, and sole flexibility), and the shoe/surface interface (foresole material, shoe-to-ground coefficient of friction, sole contact area). RESULTS: Greater heel height was associated with increased risk of a fall (P for trend=.03), whereas greater sole contact area was associated with reduced risk (P for trend=.005). Shoe characteristics related to foot position sense bore little apparent relation to fall risk. Coefficients of friction of 0.5 or greater were observed in 93% of shoes measured, indicating that very few were excessively slippery. CONCLUSION: Certain measurable properties of shoes were found to be significantly related to risk of falls in older adults. Wearing shoes with low heels and large contact area may help older adults reduce the risk of a fall in everyday settings and activities.

Accidental Falls↗
PubMed2003

Exercise plus behavioral management in patients with Alzheimer disease: a randomized controlled trial.

CONTEXT: Exercise training for patients with Alzheimer disease combined with teaching caregivers how to manage behavioral problems may help decrease the frailty and behavioral impairment that are often prevalent in patients with Alzheimer disease. OBJECTIVE: To determine whether a home-based exercise program combined with caregiver training in behavioral management techniques would reduce functional dependence and delay institutionalization among patients with Alzheimer disease. DESIGN, SETTING, AND PATIENTS: Randomized controlled trial of 153 community-dwelling patients meeting National Institute of Neurological and Communicative Diseases and Stroke/Alzheimer Disease and Related Disorders Association criteria for Alzheimer disease, conducted between June 1994 and April 1999. INTERVENTIONS: Patient-caregiver dyads were randomly assigned to the combined exercise and caregiver training program, Reducing Disability in Alzheimer Disease (RDAD), or to routine medical care (RMC). The RDAD program was conducted in the patients' home over 3 months. MAIN OUTCOME MEASURES: Physical health and function (36-item Short-Form Health Survey's [SF-36] physical functioning and physical role functioning subscales and Sickness Impact Profile's Mobility subscale), and affective status (Hamilton Depression Rating Scale and Cornell Depression Scale for Depression in Dementia). RESULTS: At 3 months, in comparison with the routine care patients, more patients in the RDAD group exercised at least 60 min/wk (odds ratio [OR], 2.82; 95% confidence interval [CI], 1.25-6.39; P =.01) and had fewer days of restricted activity (OR, 3.10; 95% CI, 1.08-8.95; P<.001). Patients in the RDAD group also had improved scores for physical role functioning compared with worse scores for patients in the RMC group (mean difference, 19.29; 95% CI, 8.75-29.83; P<.001). Patients in the RDAD group had improved Cornell Depression Scale for Depression in Dementia scores while the patients in the RMC group had worse scores (mean difference, -1.03; 95% CI, -0.17 to -1.91; P =.02). At 2 years, the RDAD patients continued to have better physical role functioning scores than the RMC patients (mean difference, 10.89; 95% CI, 3.62-18.16; P =.003) and showed a trend (19% vs 50%) for less institutionalization due to behavioral disturbance. For patients with higher depression scores at baseline, those in the RDAD group improved significantly more at 3 months on the Hamilton Depression Rating Scale (mean difference, 2.21; 95% CI, 0.22-4.20; P =.04) and maintained that improvement at 24 months (mean difference, 2.14; 95% CI, 0.14-4.17; P =.04). CONCLUSION: Exercise training combined with teaching caregivers behavioral management techniques improved physical health and depression in patients with Alzheimer disease.

Activities of Daily Living↗
PubMed2002

Recruitment of older participants in frailty/injury prevention studies.

Despite the lifelong health benefits of physical activity, frailer older adults have typically been excluded from studies promoting more active lifestyles. This study documents the recruitment process and costs from a multisite study to identify effective strategies for recruiting older adults in frailty/injury prevention research. Randomized controlled clinical trials were conducted at 7 sites; an 8th site was a compliance study. Interventions reflected center- and home-based health promotion programs. Site objectives, eligibility criteria, and contact and screening methods were obtained from manuals of operation. Recruitment results (number screened, eligibility rates, randomized to screened ratios) were ascertained from recruitment data. Sites furnished estimated recruitment costs (nonlabor expenses, investigator and staff time, fringe benefits) up to signing the consent form. The sites targeted diverse populations and sample sizes. The majority revised recruitment methods to meet their recruitment goals. Most sites estimated costs of recruitment at over $300 per participant randomized. Recruitment costs were affected by staff time spent alleviating concerns about participants' health, essential interactions with family members, and arranging for transportation. Neither frailty nor intervention intensity was found to be a major predictor of recruitment outcomes. Recruitment expense was associated with selection criteria and frailty status of the target population. Older people can be successfully recruited into beneficial health promotion programs, but it is often challenging. In planning health promotion studies, investigators need to be aware of the numbers of older people they may need to screen and different strategies for increasing recruitment success.

Accidental Falls↗