Comparison of heart-rate and blood-pressure increases during isokinetic eccentric versus isometric exercise in older adults

The authors compared heart-rate and blood-pressure responses to typical isometric (ISO) and isokinetic (90 degrees /s) eccentric (ECC) resistance-training protocols in older adults. Twenty healthy older adults (74 +/- 5 years old) performed randomly ordered ISO and isokinetic ECC exercise (3 sets of 10 repetitions) at a target intensity of 100 % of their peak ISO torque value. Heart rate and systolic (SBP) and diastolic (DBP) blood pressures were recorded continuously, and mean arterial pressure (MAP) and rate-pressure product (RPP) were calculated. ECC peak torque (139 +/- 33 N. m) was significantly greater than ISO peak torque (115 +/- 26 N. m; p <.001). All variables increased significantly (p <.001) during both ISO and ECC exercise. Changes in SBP, DBP, MAP, and RPP were significantly greater during ISO exercise than during ECC exercise (p <.001). Clinically, an isokinetic ECC exercise program enables older adults to work at the same torque output with less cardiovascular stress than ISO exercise.     

Sex-dependent associations between daily physical activity and leg exercise blood pressure responses

The authors examined interindividual and sex-specific variation in systolic (SBP) and diastolic (DBP) blood pressure responses to graded leg-extension exercise in healthy older (60-78 yr) women (n = 21) and men (n = 19). Maximal oxygen uptake (VO2max), body composition, physical activity (accelerometry), and vascular function were measured to identify predictors of exercise BP. Neither VO2max nor activity counts were associated with the rise in SBP or DBP during exercise in men. The strongest predictors of these responses in men were age (SBP: r2 = .19, p = .05) and peak exercise leg vasodilation (DBP: r2 = -.21, p < .05). In women, the modest relationship observed between VO2max and exercise BP was abolished after adjusting for central adiposity and activity counts (best predictors, cumulative r2 = .53, p < .05, for both SBP and DBP). These results suggest that determinants of variation in submaximal exercise BP responses among older adults are sex specific, with daily physical activity influencing these responses in women but not men.     

Adaptive changes in gait of older and younger adults as responses to challenges to dynamic balance

The study proposed to identify balance strategies used by younger and older adults during gait under proprioceptive, visual, and simultaneous proprioceptive-visual challenges. Participants ambulated under 4 conditions: consistent, noncompliant surface; inconsistent, compliant surface (C); consistent, noncompliant surface with vision obscured (NCVO); and inconsistent, compliant surface with vision obscured (CVO). Balance adaptations were measured as changes in gait velocity, cadence, and gait-stability ratio (GSR). Participants were 5 younger (mean age = 27.2) and 5 older (mean age = 68) healthy adults. Significant age differences were found for GSR (p = .03) on all surfaces. Older adults adopted a more stable gait pattern than younger adults regardless of the challenge presented by surface. Significant condition differences were found for velocity (p < .001) and cadence (p = .001). All participants exhibited significantly decreased velocity and increased cadence on surfaces C and CVO. Gait speed and cadence did not significantly change in NCVO. Younger and older adults exhibited similar adaptive balance strategies, slowing and increasing steps/s, under proprioceptive and proprioceptive-visual challenges to dynamic balance.     

Comparing measures of general and abdominal adiposity as predictors of blood pressure in college students

Objective: To compare anthropometric measures of body mass index (BMI), waist circumference (WC), waist-to-height ratio (WHtR), and sagittal abdominal diameter (SAD) as predictors of blood pressure in college students. Participants: Students (N = 116) were recruited from November 2012 to May 2014 at an urban university and rural community colleges. Methods: Students underwent a brief physical examination during which anthropometric measures were obtained and blood pressure was measured. Covariates were measured using self-reported questionnaires. Hierarchical multiple linear regressions were used for the data analysis. Results: All anthropometric measures were predictive of systolic (SBP) and diastolic blood pressure (DBP). WC was the strongest predictor of SBP (β = .582, p < .01) explaining an additional 3–4% of the variance than BMI, WHtR, or SAD. The measures were similar in predicting DBP. WC predicted SBP independent of BMI. Conclusions: Clinicians should consider using WC to assess the risk for hypertension in college students.     

Cardiorespiratory fitness, obesity, and functional limitation in older adults

One hundred forty-six abdominally obese adults age 60-80 yr were studied to investigate the interaction between cardiorespiratory fitness (CRF) and obesity on functional limitation. Obesity was determined by fat mass (FM), CRF was determined by a maximal treadmill test, and functional limitation was based on 4 different tasks that are predictive of subsequent disability. Both FM (r = -.34, p ≤ .01) and CRF (r = .54, p ≤ .01) were independently associated with functional limitation in bivariate analysis.After further control for sex, age, and the interaction term (CRF × FM), FM was no longer independently associated with functional limitation (p = .10). Analyses were also based on sex-specific tertiles of FM and CRF. The referent group demonstrated significantly lower functional limitation than the low-CRF/low-FM and the low-CRF/high-FM groups (both p ≤ .05). These results highlight the value of recommending exercise for abdominally obese adults.     

Campus walkability, pedometer-determined steps, and moderate-to-vigorous physical activity: a comparison of 2 university campuses

OBJECTIVE AND PARTICIPANTS: At 2 Arizona State University (ASU) campuses, the authors measured student activity and distance walked on campus, as well as student-reported walkability around the student union. METHODS: Students from ASU-Polytechnic (n = 20, 33% male) and ASU-Tempe (n = 20, 60% male) recorded distance walked on campus and wore physical activity monitors for 5 days. RESULTS: Polytechnic students spent an average of 36.9 minutes in moderate-to-vigorous physical activity each week; Tempe students spent 69.5 minutes (p < .001). At Polytechnic, students walked an average of 7,674 steps per weekday; at Tempe, 11,294 steps (p = .003). Female students at Polytechnic walked an average of 1.3 km/d; at Tempe, 4.3 km/d (p < .001). At Polytechnic, men walked an average of 1.4 km/d; at Tempe, 3.1 km/d (p = .03). Tempe students rated campus walk-ability as very good, whereas Polytechnic students rated it fair (p < .001). CONCLUSIONS: Students at both campuses met activity recommendations; noted differences may be attributed to the built environment's contribution to walkability.     

Oxygen consumption, heart rate, rating of perceived exertion, and systolic blood pressure with water treadmill walking

The purpose of this study was to examine the cardiovascular responses to water treadmill walking at 2.0 mph (3.2 km/hr), 2.5 mph (4.0 km/hr), and 3.0 mph (4.8 km/hr) in older adults. Responses to water treadmill walking in 92 degrees F (33 degrees C) water were compared with responses to land treadmill walking at 70 degrees F (21 degrees C) ambient temperature. After an accommodation period, participants performed 5-min bouts of walking at each speed on 2 occasions. Oxygen consumption (VO2), heart rate (HR), systolic blood pressure (SBP), and rating of perceived exertion (RPE) were significantly higher during therapeutic water treadmill walking than during land treadmill walking. Furthermore, VO2, HR, and RPE measures significantly increased with each speed increase during both land and water treadmill walking. SBP significantly increased with each speed during water treadmill walking but not land treadmill walking. Thus, it is imperative to monitor HR and blood pressure for safety during this mode of activity for older adults.     

Leptin as a marker of body fat and hyperinsulinemia in college students

Little is known about obesity and insulin resistance in college students. Leptin is a hormone secreted by fat cells and has been shown to strongly correlate with both obesity and insulin resistance in children and adults. We investigated associations of leptin with insulin secretion and action in 119 normal-weight students aged 18-24 years. Leptin was strongly correlated with total fat mass (r = .67, p <.001), percentage body fat (r= .81, p < .001), and to a lesser degree Body Mass Index, or BMI, (r = .23, p < .02). Leptin was associated with fasting insulin (beta+/-SE = 0.30+/-0.06, p < .001) and insulin resistance (beta+/-SE = 0.41+/-0.20, p < .001) independent of total fat, gender, and age, suggesting other mechanisms of leptin and insulin regulation besides obesity. Leptin resistance is present even among young and normal-weight college students. Leptin, even more so than BMI, is an important marker of adiposity and hyperinsulinemia in normal-weight college students and may potentially be used to predict type 2 diabetes.     

Perceptions of participants and staff of implementing a physical activity program in rural primary care

Addressing the lack of physical activity (PA) in rural adults is vital because of the role it plays in the risk for many chronic diseases. The purpose of the study was to explore the feasibility of conducting a 12-week intervention utilizing a Fitbit to increase PA behavior in inactive rural adults recruited from a primary care clinic. Semi-structured interviews were conducted with study participants (n=10) and a focus group was held with nurses (n=7) from the primary care clinic. Data were analyzed using the process of immersion/crystallization. Participants and nurses both felt the program had a positive impact on PA and that the program was needed in the community. Study participants most often reported their favorite part of the study was being able to track their activity as well as the goal setting. However, study participants reported barriers to continued participation in PA related to a lack of time and ability to be active in cold weather. Further, nursing staff reported barriers in regard to a lack of resources (staffing and money) These barriers need to be examined further and addressed in order to implement a sustainable PA program that can be maintained through a primary care clinic.     

The impact of high-calorie-expenditure exercise on quality of life in older adults with coronary heart disease

The acceptability of a high-calorie-expenditure (HCE) exercise program in older coronary heart disease patients participating in a behavioral weight-control program was evaluated. Seventy-four overweight patients (median age 63 yr) were randomly assigned to a 5-mo intervention of HCE exercise (3,000-3,500 kcal/wk daily walking) or standard cardiac-rehabilitation (CR) exercise (700-800 kcal/wk). Both groups received counseling to achieve a dietary caloric deficit of 3,500 kcal/ wk. Assessments at baseline and 5 mo included self-reported measures of quality of life and psychosocial variables. The HCE group experienced significantly greater weight loss (8.2 ± 4 vs. 3.7 ± 5 kg, p < .001). Changes from baseline to 5 mo on scores of physical, emotional, and social functioning were greater for the HCE than CR group (p < .05). HCE exercise also resulted in greater positive change in exercise enjoyment (p = .05), which was mediated by weight change. Even high-risk older adults can be successful in an HCE exercise program and experience no adverse physical or emotional changes.     

Risk factors associated with overweight and obesity in college students

College obesity is increasing, but to the authors' knowledge, no researchers to date have evaluated risk factors in this population. OBJECTIVE: The authors assessed whether abnormal eating perceptions and behaviors were associated with overweight in college students. PARTICIPANTS AND METHODS: A sample of undergraduates (N = 4,201) completed an online survey containing demographic questions and the Eating Attitudes Test-26 (EAT-26) questionnaire. The authors stratified participants into normal-weight and overweight/obese groups and evaluated physical activity, EAT-26 score, purging behaviors, and answers to selected overweight screening questions on the basis of body mass index. A modified EAT-26 score of > or = 11 was associated with overweight (p = .016). RESULTS: Compared with normal-weight peers, overweight participants displayed an increased fear of bingeing, preoccupation with food, desire to be thinner, and engagement in dieting behavior. Mean body mass index also increased with age and physical inactivity (p < .001). CONCLUSIONS: Because physical inactivity, disordered eating perceptions, and disordered behaviors are associated with increased rates of overweight and obesity, identification of these risk factors in obese youths may increase understanding of weight loss barriers and facilitate the treatment of adolescent obesity.     

Effects of an 8-week multimodal exercise program on strength, flexibility, and golf performance in 55- to 79-year-old men

Substantial research has indicated the beneficial effect of physical activity on physical fitness and activities of daily living in older adults, but none have investigated the effects on performance of recreational activities. This investigation studied the effect of an exercise program on fitness and golf-clubhead speed in older men. Thirty-one golfers (mean age 65.1 +/- 6.2 years) were randomly assigned to a treatment (n = 19) or control (n = 12) group. The treatment group completed an 8-week strength and flexibility program. Assessments included 10-RM muscle strength; selected range-of-motion (ROM) measurements; and golf-clubhead speed (CHS). ANCOVA revealed significant differences between groups (p <.005) for all strength measurements and several ROM measurements. CHS was significantly different (p <.05) between groups after the intervention. Mean CHS improved from 85.0 to 87.1 miles/hr (136.8 to 140.2 km/hr). These results indicate that a strength and flexibility program can improve golf performance in older adults.     

An Intergenerational Perspective on Grandparent Roles

Abstract

This study provides an intergenerational perspective on grandparent roles. Data was collected from young parents (N = 105) and middle-age and older adults (N = 105). Both groups identified multiple roles as important for grandparents to initiate with young grandchildren: these included being a playmate as well as a friend, teacher, and role model. Intergenerational differences were also found with middle-age and older adults more likely than young parents to rank religious guide (p < .001) and family historian (p < .05) as important roles to enact with young grandchildren. However, the young parents were more likely than the older participants to predict that grandparents would be remembered by their grandchildren as fun, having high values, being a role model, and financially supportive (p < .001). Recommendations for future intergenerational research are recommended.     

The relationship between pedometer-determined and self-reported physical activity and body composition variables in college-aged men and women

Pedometer-determined physical activity (PA) is inversely related to body composition in middle-aged adults; however, researchers have not established such a relationship in college students. OBJECTIVE AND PARTICIPANTS: In this study, the authors attempted to characterize PA and examine its relationship with body composition in undergraduate college students (N = 88). METHODS: The authors measured the BC of 44 women (M age = 21 +/- 1 year, M body mass index [BMI] = 23.9 +/- 4 kg/m2) and 44 men (M age = 22 +/- 1 year, BMI = 26.9 +/- 0.9 kg/m2); participants also wore a pedometer for 7 days and completed a PA questionnaire. RESULTS: Men averaged significantly more steps/day (10,027 +/- 3,535) than did women (8,610 +/- 2,252). For women only, the authors observed significant correlations between steps/day and body composition variables. Men reported engaging in vigorous PA significantly more often than did women. CONCLUSIONS: These findings indicate that men engage in PA more often but that PA is related to body composition only in women. In addition, there is better agreement between pedometer-measured and self-reported PA in college-aged men than women.     

Parent adoption and implementation of obesity prevention practices through building children's asking skills at family child care homes

BackgroundEarly childhood education programs provide a setting to reach children and parents to modify home environments to prevent obesity. The Healthy Opportunities for Physical Activity and Nutrition Home (HOP’N) Home project was a novel approach that linked Family Child Care Homes (FCCH) to home environments by developing children’s asking skills for healthful home environmental change through curricular activities.ObjectiveTo evaluate the feasibility of engaging parents in obesity prevention practices through building children's asking skills at FCCH.MethodsFCCHs (n = 5 settings) and children (n = 25; aged 3−5 years; female = 36 %; non-Hispanic white = 91 %; low socioeconomic status = 28 %; overweight/obese = 52 %) and parents (n = 25) participated in a pre-post cohort design. We assessed children's body mass index and self-report variables at three time points. HOP'N Home included continuous staff training, group time, dramatic play, meal prompts, songs, and home activities.ResultsFCCH providers implemented 83%–100% of intervention activities. All parents (100 %) adopted the program, most (87 %) returned completed homework activities to FCCHs, and over 90 % implemented changes in the home. Percent of overweight/obese children decreased from pre-intervention (50 %) to post-intervention (29 %,p = 0.06) and follow-up (38 %,p = 0.06).ConclusionsIt is feasible to build children's asking skills and pair this strategy with home activities to engage parents to prevent obesity.     

Comparison of the IPAQ-Short Form and accelerometry predictions of physical activity in older adults

Older adult physical activity (PA) levels obtained from the International Physical Activity Questionnaire-Short Form (IPAQ) and accelerometry (ACC) were compared. Mean difference scores between accumulated or bout ACC PA and the IPAQ were computed. Spearman rank-order correlations were used to assess relations between time spent in PA measured from ACC and self-reported form of the IPAQ, and percentage agreement across measures was used to classify meeting or not meeting PA recommendations. The IPAQ significantly underestimated sitting and overestimated time spent in almost all PA intensities. Group associations across measures revealed significant relations in walking, total PA, and sitting for the whole group (r = .29-.36, p < .05). Significant relationships between bout ACC and IPAQ walking (r = .28-.39, p < .05) were found. There was 40-46% agreement between measures for meeting PA recommendations. The IPAQ appears not to be a good indicator of individual older adult PA behavior but is better suited for larger population-based samples.     

Frailty in self-neglecting older adults: A secondary analysis

ABSTRACT

Self-neglect (SN) and frailty in older adults is associated with increased disability and mortality. Despite these commonalities, there have been no studies objectively assessing frailty in older adults who SN. This secondary analysis classified frailty in N = 37 older adults with Adult Protective Services validated SN using the Fried Frailty Phenotype (FFP) of weight loss, weakness, exhaustion, activity level, and walking speed. Overall, 3% were classified as robust, 62% as prefrail, and 35% as frail. Most (72%) were overweight/obese, with clinically significant decreases in activity level (60%) and walking speed (97%). Compared to the original FFP population, older adults who SN exhibit important differences in frailty phenotypes, and finding that the largest percentage of older adults who SN were prefrail may indicate a critical opportunity for intervening in this population to reduce future functional decline and mortality.     

Neighborhood and individual factors in activity in older adults: results from the neighborhood and senior health study

This study examined whether features of the built environment and residents' perceptions of neighborhood walkability, safety, and social cohesion were associated with self-reported physical activity (PA) and community-based activity among a sample of 190 older adults (mean age 74) residing in 8 Denver neighborhoods. Neighborhood walking audits were conducted to assess walkability and social capital. In multilevel analyses, a few walkability variables including curb cuts, crosswalks, and density of retail predicted greater frequency of walking for errands (p < .05), but mean frequency of walking for errands for this sample was low (<1/wk). Contrary to expectations, total PA and community-based activity were highest in neighborhoods with fewer walkability variables but higher respondent perceptions of safety and social cohesion (p < .01). For seniors, the importance of characteristics of the built environment in promoting PA and general activity engagement might be secondary to attributes of the social environment that promote safety and social cohesion.     

Increasing walking in college students using a pedometer intervention: differences according to body mass index

Objective: The researchers assessed the effectiveness of a pedometer intervention and differences in walking behaviors according to body mass index (BMI). Participants: Two hundred ninety college students completed the intervention from January to February 2005. Methods: Participants wore pedometers 5 days per week for 12 weeks and completed questionnaires assessing demographic information. The authors calculated daily step averages for weeks 1, 6, and 12. They then classified students as underweight (UW), normal weight (NW), or overweight/obese, by BMI. The authors analyzed data using repeated-measures analysis of variance. Results: The average number of daily steps increased from week 1 to week 6 (p < .001) and week 12 (p = .002). UW participants reported the fewest steps at each time point, but the difference was significant only when compared with NW participants (p = .03). Conclusions: These results support the effectiveness of a pedometer intervention to increase walking in college students. Health benefits other than weight management should be emphasized to maximize the effects for all students.     

Better self-perceived health is associated with lower odds of physical inactivity in older adults with chronic disease

Poor self-perceived health (SPH) is associated with lower levels of physical activity (PA) and the presence of chronic disease in older adults. The purpose of this study was to determine whether SPH is associated with PA levels in older adults with existing chronic disease and whether this differs by disease. Using logistic regressions on data from the Canadian Community Health Survey (N = 33,168) it was found that adjusted logistic regressions revealed that odds of physical inactivity were similar in those with good SPH who reported having respiratory, musculoskeletal, or other chronic disease compared with those with good SPH without these diseases. Those with good SPH who reported having cardiometabolic disease were at significantly greater risk of physical inactivity than those with good SPH without cardiometabolic disease. It is apparent from the current analysis that SPH plays an important role in PA levels of older adults with chronic disease and should be targeted in future interventions.