Biomedical subjects

Patricia A Hageman

Publications and source records attributed to Patricia A Hageman.

10 recordsLinked to original sources

PubMed2006

Differences in eating and activity behaviors, health history, and biomarkers among normal-weight, overweight, and obese rural midwestern hispanic women.

This project examined differences in health history, eating and activity behaviors, and biomarkers across three weight categories of rural, Midwestern, US-born Hispanic women as a way to identify critical factors for improving long-term health. Using a cross-sectional descriptive design, a convenience sample of 70 women, aged 19 to 69 years, completed general health, demographic, food frequency, and physical activity questionnaires. Height, weight, blood pressure, and waist circumferences were measured and recorded. One-way analyses of variance and chi(2) analyses were completed. Differences in the presence of diabetes and hypertension were demonstrated across the weight categories. In all three weight categories, fat intakes exceeded and fruit, vegetable, and dairy intakes were below current recommendations. Higher mean daily grain food intake was found for women of normal weight compared to overweight women (7.1+/-5.5 vs 3.6+/-2.3 servings, respectively, P=0.01). A greater proportion of normal-weight women (61.9%) met the targeted physical activity level compared to overweight (42.9%) and obese (21.4%) women (chi(2)=8.29, P=0.016). Because differences in physical activity rather than energy intakes might be a source of energy imbalances that affect weight, additional work to identify behavioral determinants that promote adoption of healthful activity behaviors will be a key component in designing effective educational strategies for these Hispanic women.

Adult↗

PubMed2006

Determinants of older rural women's activity and eating.

This research examined the relationship of cognitive-perceptual determinants from the Health Promotion Model to physical activity and healthy eating at baseline of a clinical trial among rural women aged 50 to 69. Two multivariate regression analyses with canonical correlation (N = 179) each yielded one interpretable canonical variate that explained similar amounts of variance (21.7% and 22.5%) in sets of activity and eating variables. In both analyses, the determinants set is a linear combination of all four cognitive-perceptual constructs from the model (perceived self-efficacy, benefits, barriers, interpersonal influences). The activity behavior set included caloric expenditure, VO2max, and stretching and strengthening activity, whereas the eating behavior set included daily percentage of calories from fat and servings of fruits and vegetables, meat, and whole grains. As predicted by theory, greater self-efficacy, benefits and interpersonal support, and fewer barriers are associated with desirable healthy lifestyle behaviors.

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PubMed2005

Physical activity and fitness among midlife and older rural women.

This study investigated physical activity and fitness of midlife and older rural women. Random-digit dialing was used to recruit 225 women (57.9 +/- 5.6 years old). Self-reported activity (moderate activity, flexibility, and strength) and fitness (body composition, flexibility, strength, and estimated VO(2max)) were assessed. The women demonstrated low daily energy expenditure (30.74 +/- 10.63 kcal x kg(-1) x day(-1)) and estimated VO(2max) (20.12 +/- 7.81 ml x kg(-1) x min(-1)), with 51.5% reporting fair or poor health. Few women reported meeting Healthy People 2010 targets for moderate activity (43.1%), flexibility (28.9%), or strength )14.2%). When classified by estimated VO(2max) into three categories, differences were observed for body-mass index, percent body fat, sit and reach, and timed chair stands, with the poorest performance by those with low cardiorespiratory fitness. Adherence to Healthy People 2010 targets for moderate activity and strengthening was associated with higher cardiorespiratory fitness. These rural women are targets for physical activity interventions because of their sedentary behaviors and low cardiorespiratory fitness.

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PubMed2005

Tailored versus standard internet-delivered interventions to promote physical activity in older women.

PURPOSE: While substantial evidence demonstrates physical activity is effective at reducing risk for cardiovascular and other diseases, the percentage of older women participating in regular activity is low. The Internet offers an alternative method for delivery of a primary prevention intervention. This preliminary study examined the feasibility and effectiveness of using the Internet to deliver behavior change interventions for promoting physical activity in women ages 50-69 years. METHODS: Thirty-one healthy women (56.1 +/- 4.9 years) were randomly assigned to either tailored or standard newsletter groups. Both groups received 3 Internet-delivered newsletters at baseline, 1 month, and 2 months. Behavioral markers and biomarkers were measured at baseline and postintervention. Post-testing occurred at 3 months (1 month after delivery of the third newsletter). RESULTS: Repeated measures ANOVAs revealed improvement in measures of flexibility and perceived barriers to exercise for both groups. For the standard group, improvement occurred in % body fat while VO2max declined. Women indicated the newsletters were helpful in influencing behavior change. CONCLUSION: Internet-delivered newsletters appeared feasible and promising for favorably influencing perceptions about barriers to physical activity in these women. Selfreported physical activity did not increase although selected biomarkers did improve. Whether tailored or standard messaging was more effective was inconclusive.

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PubMed2003

Nonlinear dynamics indicates aging affects variability during gait.

OBJECTIVE: To investigate the nature of variability present in time series generated from gait parameters of two different age groups via a nonlinear analysis. DESIGN: Measures of nonlinear dynamics were used to compare kinematic parameters between elderly and young females. BACKGROUND: Aging may lead to changes in motor variability during walking, which may explain the large incidence of falls in the elderly. METHODS: Twenty females, 10 younger (20-37 yr) and 10 older (71-79 yr) walked on a treadmill for 30 consecutive gait cycles. Time series from selected kinematic parameters of the right lower extremity were analyzed using nonlinear dynamics. The largest Lyapunov exponent and the correlation dimension of all time series, and the largest Lyapunov exponent of the original time series surrogated were calculated. Standard deviations and coefficient of variations were also calculated for selected discrete points from each gait cycle. Independent t-tests were used for statistical comparisons. RESULTS: The Lyapunov exponents were found to be significantly different from their surrogate counterparts. This indicates that the fluctuations observed in the time series may reflect deterministic processes by the neuromuscular system. The elderly exhibited significantly larger Lyapunov exponents and correlation dimensions for all parameters evaluated indicating local instability. The linear measures indicated that the elderly demonstrated significantly higher variability. CONCLUSIONS: The nonlinear analysis revealed that fluctuations in the time series of certain gait parameters are not random but display a deterministic behavior. This behavior may degrade with physiologic aging resulting in local instability. RELEVANCE: Elderly show increased local instability or inability to compensate to the natural stride-to-stride variations present during locomotion. We hypothesized that this may be the one of the reasons for the increases in falling due to aging. Future efforts should attempt to evaluate this hypothesis by making comparisons to pathological subjects (i.e. elderly fallers), and examine the sensitivity and specificity of the nonlinear methods used in this study to aid clinical assessment.

Adult↗

PubMed2003

Can neuromuscular strength and function in people with dementia be rehabilitated using resistance-exercise training? Results from a preliminary intervention study.

BACKGROUND: Neuromuscular weakness is a prominent symptom among people with central nervous system disorders, such as dementia, typically leading to disability in activities of daily life. We sought to evaluate the potential of resistance exercise to improve neuromuscular strength and function in the lower extremities among community-dwelling people with dementia. METHODS: Twenty-eight subjects, aged 70-88 years and with an average Mini-Mental State Examination score of 17.8 +/- 7.2, were recruited from a population of adult daycare facility users. Subjects underwent pre- and postintervention assessment of strength and physical function consisting of determination of bilateral maximum strength of the knee extensor, hip flexor, dorsiflexor muscles, and handgrip; and evaluation of lower-extremity function based on repeated chair stands and gait speed. The intervention consisted of moderate-intensity progressive resistance training of the hip extensors, abductors, knee extensors and flexors, and dorsiflexors using the Theraband resistance system for up to 3 days weekly over a 6-week period. RESULTS: Subjects completed an average of 11.4 +/- 2.5 exercise sessions. Among those who exercised at least twice per week (> or = 12), they improved an average of 15.6% in quadriceps strength, 10.1% in handgrip strength, 22.2% in sit-to-stand (STS) time, 9.9% in usual gait time, 5.4% in fast gait time (p =.03), and 14.0% in the timed-up-and-go (TUG) test. CONCLUSIONS: Subjects demonstrated improvements in some areas of muscular capacity (quadriceps and handgrip) and most tests of lower-extremity function (STS, gait, TUG), yet declines in other areas (dorsiflexion and iliopsoas strength). Although strength or functional deficits in all domains were not remediable, these results suggest the potential of a resistance-exercise intervention of longer duration and/or greater intensity to produce beneficial effects on the neuromuscular functioning of people with dementia.

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PubMed2002

Gait performance in dementia: the effects of a 6-week resistance training program in an adult day-care setting.

BACKGROUND: Age-related declines in balance and muscle power are largely responsible for the changes in the various components of gait performance among elderly people. But these can often be remedied with strength training. People with cognitive impairment frequently demonstrate impaired gait, putting them at increased risks for falls and serious injury. OBJECTIVES: This paper reports on the effects of a six-week pilot study of moderate intensity strength training on the gait of elderly individuals with dementia who attend a day-care center. METHODS: Twenty-six adults (23 female, three male), age = 79.2 +/- 6.6 years, completed the study. Each subject completed a baseline assessment of lower extremity strength and gait. Gait was evaluated using free- and fast-gait speed over a 6-meter course, the Tinetti-Gait Assessment scale, the 'Timed-Up-and-Go', and the Gait Assessment Rating Scale (GARS). The intervention consisted of moderate-intensity progressive resistance lower extremity exercise using Theraband, for two to three sessions per week over the six weeks. Post-intervention assessment of strength and gait was repeated at the completion of the sixth week. Multiple paired t-tests were calculated for each outcome measure. RESULTS: The baseline assessment of gait suggests a high degree of frailty and risk for falls in the sample. Although post-intervention scores reflected improvement on all gait measures, the only statistically significant change observed was in fast-gait time. CONCLUSION: A six-week resistance training program proved to be of insufficient duration, intensity or specificity to produce significant change in gait outcome measures, with the exception of fast speed gait.

Activities of Daily Living↗

PubMed2002

A preliminary study on the reliability of physical performance measures in older day-care center clients with dementia.

BACKGROUND: Decline in physical functional ability is an intrinsic component of the dementia syndrome. Reductions in muscle mass and strength represent a major factor in the loss of functional ability Although resistance exercise has been studied as a method for maintaining/recovering function in populations of frail older adults, people with dementia have been systematically excluded because of uncertainty about the reliability of outcome measurements. OBJECTIVE: The purpose of this study was to determine the test-retest reliability of a battery of established performance-based measures of strength and function among subjects with dementia. SETTING: A hospital-affiliated adult day-care facility. SUBJECTS: Twelve of 28 older subjects with dementia of various etiologies were available for two assessments prior to implementation of a resistance-exercise intervention. METHODS: Subjects underwent an assessment of lower extremity strength and physical function consisting of two recorded trials of bilateral isometric strength of the knee extensor, hip flexor, and dorsiflexor muscles, as well as hand grip strength; repeated chair stands, evaluation of usual- and maximal safe-gait speed over a 6-m course, and the Timed-Up-and-Go Test. The entire assessment was repeated approximately 1 week later. An average of the trials for each measurement was computed for each of the two assessment periods, and intraclass correlation coefficients (ICCs) for these paired measurements were estimated using STATA. RESULTS: ICCs ranged from .56 for left iliopsoas to .77 for left dorsiflexors among the strength measures whereas measures of function ranged from .80 for number of steps in usual gait to .95 for time of fast gait. CONCLUSIONS: Performance-based measures of strength and function can be reliably assessed in older people with dementia, although measures of function appear to be more reliable than measures of strength.

Activities of Daily Living↗

PubMed2002

Comparison of gait patterns between young and elderly women: an examination of coordination.

This study investigated intralimb coordination during walking in young and elderly women using the theoretical model of dynamical systems. 20 women, 10 Young (M age=24.6 yr., SD= 3.2 yr.) and 10 Elderly (M age=73.7 yr., SD=4.9 yr.), were videotaped during free speed gait and gait perturbed by an ankle weight. Two parameters, one describing the phasing relationship between segments (mean absolute relative phase) and the other the variability of this relationship (deviation in phase), were calculated from the kinematics. Two-way analysis of variance (age and weight) with repeated measures on weight indicated that during the braking period the weight increased the mean absolute relative phase between the shank and the thigh and decreased it between the foot and the shank. The Elderly women had significant smaller values for the mean absolute relative phase between the shank and the thigh during the braking period. For the same period, deviation in phase increased for the segmental 'relationship between the shank and the thigh. The findings suggest that changes in intralimb coordination take place with asymmetrical weighting and the aging process. These changes are most clearly present during the braking period.

Adult↗

PubMedDate not supplied

Differences in eating and activity markers among normal weight, overweight, and obese rural women.

PURPOSE: The purpose of this study was to examine differences in healthy eating and physical activity behaviors and associated biomarkers among normal weight (body mass index [BMI] < 25), overweight (BMI 25-29.9), and obese (BMI > or = 30) rural women. METHODS: Random digit dialing was used to recruit 225 rural women (57.9 +/- 5.6 years). Measures of healthy eating and physical activity were completed on the computer during individual sessions at the rural sites. Research nurses then assessed a battery of biomarkers of activity and eating, including blood lipids, blood pressure, cardiorespiratory fitness (VO(2max)), and resting heart rate. RESULTS: Major findings were differences across weight categories in daily calories consumed and expended, daily fruit servings, daily meat group servings, high-density lipoprotein cholesterol, vital signs, and cardiorespiratory fitness. The obese women both consumed and expended significantly more calories daily than those in the other two weight groups. Obese women consumed significantly fewer fruit group servings than both the normal weight and overweight women. Obese women consumed significantly more meat group servings than overweight women. There also were significant differences in systolic blood pressure, diastolic blood pressure, resting heart rate, high-density lipoprotein cholesterol, and cardiorespiratory fitness across the three weight groups. CONCLUSIONS: This study provides evidence of major differences in some eating and activity behaviors and biomarkers across BMI groups. Major differences exist between the normal weight and overweight group as compared to the obese group.

Activities of Daily Living↗