Connectedness to Nature Does Not Explain the Variation in Physical Activity and Body Composition in Adults and Older People.
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ABSTRACT:
SUBMITTER: Teixeira A
PROVIDER: S-EPMC8619523 | biostudies-literature |
REPOSITORIES: biostudies-literature
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Project description:BackgroundLower muscle and higher fat mass are characteristics of older adults; their physical function is also characterized by slower gait speed and weaker strength. However, the association between specific body composition and physical function is unclear.MethodsWe examined the association between body composition and physical performance using combined cross-sectional data of 1,821 participants from 13 clinical studies at Wake Forest University that used a consistent battery of tests. All participants were ≥60 years old and had one of the following conditions: healthy, osteoarthritis, coronary artery disease, obesity, heart failure, at elevated risk for disability, renal transplantation candidates, heart failure with preserved ejection fraction, moderate self-reported disability, hypertension, diabetes, or coronary artery disease, at high risk for cardiovascular disease. Data at enrollment from each study using uniform tools including body mass index (BMI), dual energy x-ray absorptiometry, physical performance assessment using 4 m walk speed, five chair rise time, handgrip strength, short physical performance battery (17), and Pepper Assessment Tool for Disability were analyzed.ResultsIncreased BMI was associated with slower walk speed, lower short physical performance battery, and higher Pepper Assessment Tool for Disability score. Increased percentage of body fat was associated with slower walk speed, lower hand grip strength, lower short physical performance battery scores, and higher Pepper Assessment Tool for Disability scores. Percent appendicular lean mass was associated with faster walk speed, higher handgrip strength, higher short physical performance battery, and lower Pepper Assessment Tool for Disability score. There were no significant discrepancies in relationship between body composition and physical function by gender except gender and BMI on chair-rise time.ConclusionsHigher BMI and percent body fat were associated with poor physical function while percent appendicular lean mass was associated with better physical function. There was no significant discrepancy in the by gender.
| S-EPMC6177091 | biostudies-literature
Project description:PurposeExamine the association of visits to the natural environment, connectedness to nature, physical activity, and the adoption of pro-environmental behaviors (PEBs) in individuals aged 18 years or older.DesignCross-sectional study.SettingCity of Vila Real, located in the north of Portugal.SubjectsWe recruited 194 individuals (61 men and 133 women) aged 18-75 years.MesuresA self-administered questionnaire was used to measure nature visits, connectedness to nature, PEBs, and demographic characteristics. Neighborhood green space was appreciated through a Simplified Land Occupation Map and physical activity was measured using ActiGraph accelerometers (wGT3X-BT).AnalysisCorrelations and nonlinear canonical correlation analysis were used to analyze the data. The coefficients of canonical and multiple correlations were calculated.ResultsNature visits were associated with involvement in environmental volunteering (V = .317, P ≤ .05) among men. In these, higher levels of moderate-vigorous PA were associated with green travel behavior (η2 = .325, P ≤ .05). Connectedness with nature was related (P ≤ .05) to private sphere behaviors, such as purchase of eco-products (η2 = .191) and local/seasonal products (η2 = .186) in females and encouraging care and protection of natural environment (η2 = .336, P ≤ .01) in males.ConclusionsNature visits, connection to nature, and physical activity levels were related to the adoption of PEBs in the private and public sphere, and these relationships differed between men and women.
| S-EPMC9755701 | biostudies-literature
Project description:Recent investigations have reported an association between depression and geriatric syndromes associated with low body mass, including frailty and osteoporosis. The objective of this study was to explore the relationship between depression and body composition among older adults.Data were from a case-cohort study (n?=?98) of adults aged 60 and older nested within the Baltimore Epidemiologic Catchment Area (ECA) Study. Lifetime depression syndrome was assessed using the Diagnostic Interview Schedule (DIS). Body composition (total and central lean and fat mass) was assessed by dual-energy x-ray absorptiometry (DEXA). The association between depression and body composition was evaluated using linear regression with bootstrap standard errors.Overall, there was no association between depression and total fat or total lean body mass. Among women, depression was associated with reduced central fat (B?=?-3.6?kg, p?<?0.06) and lean (B?=?-3.3?kg, p?<?0.04) mass adjusting for age, race, smoking status, and physical activity. Depression was unrelated to total or central fat or lean mass among men.Depression is associated with significantly lower central fat and lean mass among older women. These findings are consistent with the hypothesis that depression and frailty are interrelated in later life, particularly among women.
| S-EPMC3243816 | biostudies-literature
Project description:BackgroundThe concept of resilience has gained increasing attention in aging research; however, current literature lacks consensus on how to measure resilience. We constructed a novel resilience measure based on the degree of mismatch between persons' frailty level and disease burden and examined its predictive validity. We also sought to explore the physiological correlates of resilience.MethodsParticipants were 2,457 older adults from the Health, Aging, and Body Composition Study. We constructed the resilience measure as the residual taken from the linear model regressing frailty on age, sex, race/ethnicity, 14 diseases, self-reported health, and number of medications. Participants were classified into three groups-adapters, expected agers, and premature frailers-based on residuals (less than, within, or above one standard deviation of the mean). Validation outcomes included years of able life (YAL), years of healthy life (YHL), years of healthy and able life (YHAL), disability, hospitalization, and survival.ResultsThe average YHAL was 5.1, 7.7, and 9.1 years among premature frailers, expected agers, and adapters, respectively. Compared with premature frailers and expected agers, adapters had significantly lower rates of disability, hospitalization, and mortality and higher proportion surviving to 90 years. The likelihood of surviving to 90 years was 20.4%, 30.6%, and 39.7% among premature frailers, expected agers, and adapters.ConclusionsWe developed and validated a novel approach for quantifying and classifying physical resilience in a cohort of well-functioning white and black older adults. Persons with high physical resilience level had longer healthy life span and lower rates of adverse outcomes.
| S-EPMC9037366 | biostudies-literature
Project description:BackgroundAge is the foremost risk factor for atrial fibrillation (AF), and AF has a rising prevalence in older adults. How AF may contribute to decline in physical performance in older adults has had limited investigation. We examined the associations of incident AF and 4-year interval declines in physical performance at ages 70, 74, 78, and 82 years in the Health, Aging, and Body Composition (Health ABC) Study.Methods and resultsHealth ABC is a prospective cohort of community-dwelling older adults (n=3075). The study conducted serial assessments of physical performance with the Health ABC physical performance battery (scored 0-4), grip strength, 2-minute walk distance, and 400-m walking time. Incident AF was identified from the Center for Medicare and Medicaid Services and related to 4-year interval decline in physical performance. After exclusions, the analysis included 2753 Health ABC participants (52% women, 41% black race). Participants with AF had a significantly greater 4-year physical performance battery decline than those without AF at age 70, 74, 78, and 82, with mean estimated decline ranging from -0.08 to -0.10 U (95% confidence interval, -0.18 to -0.01; P<0.05 for all estimates) after multivariable adjustment. Grip strength, walk distance, and walk time similarly showed significantly greater declines at each 4-year age interval in participants with AF.ConclusionsIn community-based cohort older adults, incident AF was associated with increased risk of decline in physical performance. Further research is essential to identify mechanisms and preventive strategies for how AF may contribute toward declining physical performance in older adults.
| S-EPMC4826757 | biostudies-literature
Project description:The objectives were to clarify whether the relationship between physical performance and frailty was independently and jointly mediated by movement behaviors and body composition. We analyzed 871 older adults (476 women) from The Toledo Study for Healthy Aging. Skeletal muscle index (SMI) and fat index (FI) were determined using bone densitometry. Sedentary time (ST) and moderate-to-vigorous physical activity (MVPA) were assessed using accelerometry. The Frailty Trait Scale and The Short Physical Performance Battery (SPPB) were used to evaluate frailty and physical performance, respectively. Simple and multiple mediation analyses were carried out to determine the role of movement behaviors and body composition, adjusted for potential confounders. ST and MVPA acted independently as mediators in the relationship between SPPB and frailty (0.06% for ST and 16.89% for MVPA). FI also acted as an independent mediator in the same relationship (36.47%), while the mediation role of SMI was not significant. MVPA and FI both acted jointly as mediators in this previous relationship explaining 58.15% of the model. Our data support the fact that interventions should simultaneously encourage the promotion of MVPA and strategies to decrease the FI in order to prevent or treat frailty through physical performance improvement.
| S-EPMC7794741 | biostudies-literature
Project description:BackgroundAdiposity-related ventilatory constraints in older adults can potentially contribute to greater risk of exercise intolerance and mobility disability. This study investigated whether ventilatory limitation, measured by breathing reserve (BR) at peak exercise, is associated with body composition and physical function in older adults with obesity.MethodsThis study was a cross-sectional analysis of data from a community-based cohort (N = 177) of older men and women (65-79 years) with obesity (body mass index = 30-45 kg/m2). All participants underwent cardiopulmonary exercise testing on a treadmill, dual-energy X-ray absorptiometry for body composition, and physical function assessments. We examined relationships between BR and body composition and physical function using multiple linear regression and compared a subset with (BR ? 30%; BR-low; n = 56) and without (BR ? 45%; BR-high, n = 48) ventilatory limitation using unpaired Student's t test and analysis of covariance.ResultsBR was inversely related to total body mass, lean mass, fat mass, % body fat, and waist circumference (p < 0.05 for all). BR was positively related to 400 m walk time (p = .006) and inversely related to usual gait speed (p = .05) and VO2peak (p < .0001), indicative of worse physical function. BR-low had greater adiposity, but also greater lean mass, higher VO2peak, and faster 400 m walk time, compared to BR-high (p < .05, for all).ConclusionsOlder adults with obesity who also have ventilatory limitation have overall higher measures of adiposity, but do not have lower peak exercise capacity or physical function. Thus, ventilatory limitation does not appear to be a contributing factor to obesity-related decrements in exercise tolerance or mobility.
| S-EPMC6853661 | biostudies-literature
Project description:This cross-sectional study aims to improve our understanding of the psychological pathways behind the commonly reported link between experiences in nature and pro-environmentalism. Particularly, we explore whether nature experiences lead to self-reported pro-environmental behaviors (PEBs) and whether this relation is mediated by connectedness to nature. Additionally, we examine the possible lasting effect of childhood experiences with nature on adults' PEB. Most studies reporting on the link between contact with nature and pro-environmentalism have been conducted in developed countries, limiting the generalization of the results. To address this gap in the literature, the current study was conducted in a developing country (Brazil) with a sample of 224 young adults. According to our findings, greater contact with nature during childhood is associated with greater contact with nature as an adult, which, in turn, is positively associated with connectedness to nature and PEB. The stimulation of pleasant experiences while in direct contact with nature during childhood seems to trigger interactions with nature in adulthood and consequently, adults embrace pro-environmental actions.
| S-EPMC6036283 | biostudies-literature
Project description:Background:Resistance training (RT) under hypoxic conditions has been used to increase muscular performance under normoxic conditions in young people. However, the effects of RT and thus of RT under hypoxia (RTH) could also be valuable for parameters of physical capacity and body composition across the lifespan. Therefore, we compared the effects of low- to moderate-load RTH with matched designed RT on muscular strength capacity, cardiopulmonary capacity, hematological adaptation, and body composition in young and older people. Methods:In a pre-post randomized, blinded, and controlled experiment, 42 young (18 to 30 year) and 42 older (60 to 75 year) participants were randomly assigned to RTH or RT (RTH young, RT young, RTH old, RT old). Both groups performed eight resistance exercises (25-40% of 1RM, 3 × 15 repetitions) four times a week over 5 weeks. The intensity of hypoxic air for the RTH was administered individually in regards to the oxygen saturation of the blood (SpO2): ?80-85%. Changes and differences in maximal isokinetic strength, cardiopulmonary capacity, total hemoglobin mass (tHb), blood volume (BV), fat free mass (FFM), and fat mass (FM) were determined pre-post, and the acute reaction of erythropoietin (EPO) was tested during the intervention. Results:In all parameters, no significant pre-post differences in mean changes (time × group effects p = 0.120 to 1.000) were found between RTH and RT within the age groups. However, within the four groups, isolated significant improvements (p < 0.050) of the single groups were observed regarding the muscular strength of the legs and the cardiopulmonary capacity. Discussion:Although the hypoxic dose and the exercise variables of the resistance training in this study were based on the current recommendations of RTH, the RTH design used had no superior effect on the tested parameters in young and older people in comparison to the matched designed RT under normoxia after a 5-week intervention period. Based on previous RTH-studies as well as the knowledge about RT in general, it can be assumed that the expected higher effects of RTH can may be achieved by changing exercise variables (e.g., longer intervention period, higher loads).
| S-EPMC7198789 | biostudies-literature
Project description:Previous studies have reported a significant association between nature exposure and positive body image, but understandings of the mechanisms that help to explain this link remain nascent. Here, we considered the extent to which trait mindfulness and connectedness to nature, respectively, mediate the aforementioned relationship both in parallel and serially. An online sample of 398 participants (199 women, 196 men, 3 other; age M?=?28.1 years) from the United Kingdom completed measures of self-reported nature exposure, mindful awareness and acceptance, connectedness to nature, and body appreciation. Results indicated that inter-correlations between scores on all measures were significant and positive. Following the elimination of non-significant pathways, path analysis resulted in an adequately-fitting model in which the direct relationship between nature exposure and body appreciation was significant. In addition, connectedness to nature - but not trait mindfulness - significantly mediated the direct relationship. Finally, we also found evidence of a serial mediation, where the association between nature exposure and body appreciation was mediated by mindful awareness followed by connectedness to nature. The implications of these results for scholarly and practitioner understanding of the impact of nature exposure on positive body image are discussed in conclusion.
| S-EPMC7320863 | biostudies-literature