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1.
Int J Behav Nutr Phys Act ; 21(1): 109, 2024 Sep 27.
Artigo em Inglês | MEDLINE | ID: mdl-39334147

RESUMO

BACKGROUND: Identifying lifestyle factors that independently or jointly lower dementia risk is a public health priority given the limited treatment options available to patients. In this cohort study, we examined the associations between Mediterranean or Dietary Approaches to Stop Hypertension (DASH) diet adherence and cardiorespiratory fitness (CRF) with later-life dementia, and assessed whether the associations between dietary pattern and dementia are modified by CRF. METHODS: Data are from 9,095 adults seeking preventive care at the Cooper Clinic (1987-1999) who completed a 3-day dietary record and a maximal exercise test. Alzheimer's disease and related disorders or senile dementia (i.e., all-cause dementia) was identified from Medicare administrative claims (1999-2019). Illness-death models were used to estimate hazard ratios (HRs) and 95% confidence intervals (CIs) for the associations between Mediterranean or DASH diet adherence (primary exposure), CRF (secondary exposure), and all-cause dementia, adjusted for demographic and clinical factors. An interaction term was included between diet score and CRF to assess effect modification by CRF. RESULTS: The mean age at baseline was 50.6 (standard deviation [SD]: 8.4) years, and a majority of the study sample were men (77.5%) and White (96.4%). 1449 cases of all-cause dementia were identified over a mean follow-up of 9.2 (SD: 5.8) years. Neither Mediterranean nor DASH diet adherence was associated with dementia risk in fully adjusted models (HR per SD of Mediterranean diet score: 1.00, 95% CI: 0.94, 1.05; HR per SD of DASH diet score: 1.02, 95% CI: 0.96, 1.08). However, participants with higher CRF had a decreased hazard of dementia (HR, per metabolic equivalent of task [MET] increase, Mediterranean model: 0.95, 95% CI: 0.92, 0.98; HR, per MET increase, DASH model: 0.96, 95% CI: 0.92, 0.97). No effect modification by CRF was observed in the association between diet and dementia. CONCLUSIONS: In this sample of apparently healthy middle-aged adults seeking preventive care, higher CRF at midlife was associated with a lower risk of all-cause dementia, though adherence to a Mediterranean or DASH diet was not, and CRF did not modify the diet-dementia association. CRF should be emphasized in multimodal interventions for dementia prevention and investigated among diverse samples.


Assuntos
Aptidão Cardiorrespiratória , Demência , Dieta Mediterrânea , Abordagens Dietéticas para Conter a Hipertensão , Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Dieta Mediterrânea/estatística & dados numéricos , Estudos Longitudinais , Idoso , Fatores de Risco , Dieta , Exercício Físico , Padrões Dietéticos
2.
J Aging Phys Act ; 30(3): 355-363, 2022 06 01.
Artigo em Inglês | MEDLINE | ID: mdl-34453026

RESUMO

This study cross-sectionally examines the relations of sitting and physical activity (PA) with cognitive impairment in community-dwelling adults aged 55-87 years (n = 3,780). Multivariable logistic regression assessed independent and joint relations of sitting and PA with Montreal Cognitive Assessment scores adjusting for covariates. Sitting ≥75% of the time and not meeting PA guidelines were related to 60% (95% confidence interval [CI] [1.19, 2.17]) and 27% (95% CI [1.06, 1.53]) higher odds for cognitive impairment, respectively. Stratification by age showed that sitting ≥75% of the time was associated with higher cognitive impairment odds in midlife (odds ratio [OR] = 1.86; 95% CI [1.31, 2.65]), but not older adults (OR = 1.06; 95% CI [0.57, 1.95]). Joint association analysis revealed that, overall, the highest odds for cognitive impairment were in those sitting ≥75% of the time while meeting or not meeting PA guidelines (OR = 1.69, 95% CI [1.13, 2.53]; and OR = 1.66, 95% CI [1.19, 2.32], respectively). In conclusion, prolonged sitting and insufficient PA are independent risk markers for cognitive impairment.


Assuntos
Disfunção Cognitiva , Comportamento Sedentário , Idoso , Estudos Transversais , Exercício Físico , Humanos , Vida Independente
3.
Prev Med ; 150: 106720, 2021 09.
Artigo em Inglês | MEDLINE | ID: mdl-34252504

RESUMO

Few studies have adequately assessed the simultaneous effects of changes in cardiorespiratory fitness (fitness) and body mass on cardiometabolic risk. Hence, the current study's aims were twofold: (1) To determine whether increases in body mass result in higher cardiometabolic risk after controlling for fitness changes; and (2) To assess whether increases in fitness result in lower cardiometabolic risk after controlling for weight changes. The study consisted of 3534 patients who came for preventive medicine visits ≥4 times over any 10-year period (1979-2019). The primary independent variables were body mass and fitness, and the dependent variable was metabolic syndrome (MetS) and its components. Mixed-effects regression was used to model the relationship between changes in body mass, fitness, and MetS. Results indicate that increasing body mass up to a 10-year period was significantly related to increasing risk of MetS while controlling for changes in fitness. Specifically, a 1-kg increase in body mass was associated with a 17% (OR = 1.17; 95% CI 1.15-1.19) increased odds for MetS, while adjusting for fitness changes. A 1-MET increase in fitness was related to a 23% (OR = 0.77; 95% CI 0.70-0.84) decrease in odds for MetS, while adjusting for body mass changes up to 10 years. Moreover, body mass change was significantly related to changes in all cardiometabolic components of MetS. Fitness change was significantly associated with changes in MetS components. Future interventions should focus concurrently on increasing fitness and on body mass loss (or maintenance) to improve cardiometabolic health.


Assuntos
Aptidão Cardiorrespiratória , Doenças Cardiovasculares , Síndrome Metabólica , Índice de Massa Corporal , Doenças Cardiovasculares/prevenção & controle , Humanos , Estudos Longitudinais , Aptidão Física , Fatores de Risco
4.
BMC Public Health ; 21(1): 485, 2021 03 11.
Artigo em Inglês | MEDLINE | ID: mdl-33706744

RESUMO

BACKGROUND: The purpose of this study was to: 1) examine the maintenance of Physical Education and physical activity during the distance learning time, 2) determine the resources educators are utilizing to deliver PE curricula, and 3) understand the challenges experienced by educators during distance learning. METHODS: A survey was sent to a cohort of school-based fitness assessment software users. Respondents were largely school-based individuals including PE teachers (n = 1789), school (n = 62) and district administrators (n = 64), nurses (n = 3), and "other" (n = 522). RESULTS: Of 2440 respondents, most were from a city or suburb (69.7%), elementary or middle school (72.3%), and had Title 1 status (60.4%), an indicator of low socioeconomic status. Most campuses were closed during the COVID-19 pandemic (97.8%). Of the schools closed during the pandemic, only 2.8% had no prior PE requirements and that increased to 21% during the pandemic. In schools that remained open during the pandemic, 7.7% had no prior PE requirements and this increased to 60.5%. Importantly, 79% of respondents reported that students were either "significantly less" or "somewhat less" physically active during the closure. For closed schools, the most frequently cited challenges included "student access to online learning", "teacher/student communication" and "teacher remote work arrangements". For open schools, the most commonly reported challenges included "social distancing", "access to gymnasium/equipment", and "concern for personal health and wellbeing". CONCLUSION: The COVID-19 pandemic has caused important reductions in PE requirements and time engaged in physical activity. Challenges experienced by teachers were identified for closed and open schools.


Assuntos
COVID-19/prevenção & controle , Exercício Físico , Educação Física e Treinamento/tendências , Professores Escolares/psicologia , Estudantes , Adulto , COVID-19/psicologia , Criança , Currículo , Educação a Distância , Humanos , Porto Rico/epidemiologia , Instituições Acadêmicas/estatística & dados numéricos , Inquéritos e Questionários , Estados Unidos/epidemiologia
5.
J Strength Cond Res ; 35(11): 3021-3027, 2021 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-31895281

RESUMO

ABSTRACT: Farrell, SW, Pavlovic, A, Barlow, CE, Leonard, D, DeFina, JR, Willis, BL, DeFina, LF, and Haskell, WL. Functional movement screening performance and association with key health markers in older adults. J Strength Cond Res 35(11): 3021-3027, 2021-We examined Functional Movement Screening (FMS) performance and associations with key health markers among adults aged 55 years or older. Apparently healthy men (n = 425) and women (n = 158) completed a preventive medical examination between 2013 and 2018. Subjects were grouped by age and sex to determine mean scores for individual FMS items as well as total FMS score. We examined partial correlations between total FMS score and key health markers. We computed odds ratios (ORs) for having a total FMS score ≤14. The mean FMS scores for men and women were 11.7 ± 2.8 and 11.9 ± 2.3, respectively. Several differences were found between men who participated in FMS (takers) compared with FMS nontakers, whereas women FMS takers were generally similar to women FMS nontakers. After controlling for age, sex, and smoking, FMS scores were directly associated with physical activity (PA), cardiorespiratory fitness, frequency of resistance training, serum vitamin D, omega-3 index, low-density lipoprotein, and high-density lipoprotein (HDL)-cholesterol, and were inversely associated with body mass index (BMI), waist circumference (WC), blood glucose, HbA1c, and metabolic syndrome (p ≤ 0.02 for each). Adjusted OR for scoring ≤14 was significantly greater for those who were BMI and WC-obese, those with metabolic syndrome, those with low HDL-cholesterol, and those not meeting current PA guidelines. This study provides characteristics and mean values for FMS in a large older population and demonstrates that FMS performance is associated with key health markers. Prospective studies of older adults are needed to determine the utility of FMS in predicting future musculoskeletal injury and other chronic disease-related health outcomes.


Assuntos
Síndrome Metabólica , Movimento , Idoso , Índice de Massa Corporal , Feminino , Humanos , Masculino , Síndrome Metabólica/epidemiologia , Pessoa de Meia-Idade , Estudos Prospectivos , Circunferência da Cintura
6.
J Aging Phys Act ; 28(3): 448-454, 2020 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-31801110

RESUMO

The purpose of this study was to examine the association between self-reported physical activity (PA) and mean common carotid artery intima-media thickness (CCA IMT) among older adults. The data are from 1,811 Cooper Center Longitudinal Study participants, who were aged ≥60 years, with no history of cardiovascular disease. A medical history questionnaire was used to assess PA. Carotid ultrasound was performed to measure CCA IMT and the presence of plaque and stenosis. Logistic regression models were constructed to estimate the association between PA and CCA IMT after adjustment for covariates. The participants were aged 69.2 ± 5.9 years, and the majority were male (73.3%) and White (96.7%). The odds ratio of abnormal thickening of CCA IMT was 0.72 (95% confidence interval [0.54, 0.96]) in physically active participants (≥500 metabolic equivalent·min/week) after adjustment for covariates. In the current study, meeting PA guidelines in older adulthood was associated with lower odds of abnormal thickening of CCA IMT.

7.
J Aging Phys Act ; 28(4): 534-539, 2020 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-31810061

RESUMO

The purpose of the current investigation was to examine the cross-sectional associations of participation in muscle-strengthening activities (MSAs) with carotid intima-media thickness (CIMT) among older adults. The data are from 2,557 older adult participants enrolled in an observational cohort who reported no history of cardiovascular disease. MSA was determined using a questionnaire. Carotid ultrasound was performed to measure the CIMT of the common carotid artery bilaterally. Logistic regression models were constructed to estimate the association of MSA with CIMT after adjustment for potential confounders. The participants were aged 68.6 ± 7.0 years, and the majority were male (71.7%) and White (96.5%); 18% had abnormal CIMT. Meeting the physical activity guidelines for MSA was inversely associated with abnormal CIMT after adjustment for age and sex. However, this observed inverse relation became statistically null after further adjustment for cardiovascular disease risk factors, including aerobic physical activity.

8.
Circulation ; 137(18): 1888-1895, 2018 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-29343464

RESUMO

BACKGROUND: A robust literature demonstrates that coronary artery calcification (CAC) and cardiorespiratory fitness (CRF) are independent predictors of cardiovascular disease (CVD) events. Much less is known about the joint associations of CRF and CAC with CVD risk. In the setting of high CAC, high versus low CRF has been associated with decreased CVD events. The goal of this study was to assess the effect of continuous levels of CRF on CVD risk in the setting of increasing CAC burden. METHODS: We studied 8425 men without clinical CVD who underwent preventive medicine examinations that included an objective measurement of CRF and CAC between 1998 and 2007. There were 383 CVD events during an average follow-up of 8.4 years. Parametric proportional hazards regression models based on a Gompertz mortality rule were used to estimate total CVD incidence rates at 70 years of age as well as hazard ratios for the included covariates. RESULTS: CVD events increased with increasing CAC and decreased with increasing CRF. Adjusting for CAC level (scores of 0, 1-99, 100-399, and ≥400), for each additional MET of fitness, there was an 11% lower risk for CVD events (hazard ratio, 0.89; 95% confidence interval, 0.84-0.94). When CAC and CRF were considered together, there was a strong association between continuous CRF and CVD incidence rates in all CAC groups. CONCLUSIONS: In a large cohort of generally healthy men, there is an attenuation of CVD risk at all CAC levels with higher CRF.


Assuntos
Aptidão Cardiorrespiratória , Doenças Cardiovasculares/epidemiologia , Doença da Artéria Coronariana/epidemiologia , Calcificação Vascular/epidemiologia , Adulto , Fatores Etários , Idoso , Doenças Cardiovasculares/diagnóstico por imagem , Doenças Cardiovasculares/mortalidade , Doença da Artéria Coronariana/diagnóstico por imagem , Doença da Artéria Coronariana/mortalidade , Nível de Saúde , Humanos , Incidência , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Prognóstico , Medição de Risco , Fatores de Risco , Fatores Sexuais , Texas/epidemiologia , Fatores de Tempo , Calcificação Vascular/diagnóstico por imagem , Calcificação Vascular/mortalidade
9.
Circulation ; 138(21): 2315-2325, 2018 11 20.
Artigo em Inglês | MEDLINE | ID: mdl-30571575

RESUMO

BACKGROUND: The associations of low-density lipoprotein cholesterol (LDL-C) with cardiovascular disease (CVD) and coronary heart disease mortality in an exclusively low estimated 10-year risk group are not well delineated. We sought to determine the long-term associations of various LDL-C and non-high-density lipoprotein cholesterol (HDL-C) thresholds and CVD and coronary heart disease mortality in a large, low 10-year risk cohort. METHODS: The study sample included participants of the CCLS (Cooper Center Longitudinal Study) without a history of CVD or diabetes mellitus and defined as low risk (<7.5%) for 10-year atherosclerotic CVD events at baseline based on Pooled Cohort Risk Assessment Equations. The associations of fasting LDL-C and non-HDL-C with CVD mortality were tested with Cox proportional hazards models. RESULTS: In 36 375 participants (72% men, median age 42) followed for a median of 26.8 years, 1086 CVD and 598 coronary heart disease deaths occurred. Compared with LDL-C <100 mg/dL, LDL-C categories 100 to 129 mg/dL, 130 to 159 mg/dL, 160 to 189.9 mg/dL, and ≥190 mg/dL were associated with a significantly higher risk of CVD death, with hazard ratios of 1.4 (95% CI, 1.1-1.7), 1.3 (95% CI, 1.1-1.6), 1.9 (95% CI, 1.5-2.4), and 1.7 (95% CI, 1.3-2.3), and mean reductions in years free of CVD death of 1.8, 1.1, 4.3, and 3.9, respectively. After adjustment for atherosclerotic CVD risk factors, LDL-C categories 160 to 189 mg/dL and ≥190 mg/dL remained independently associated with CVD mortality, with hazard ratios of 1.7 (95% CI, 1.4-2.2) and 1.5 (95% CI, 1.2-2.1), respectively. In multivariable-adjusted models using non-HDL-C <130 mg/dL as the reference, non-HDL-C 160 to 189 mg/dL, 190 to 219 mg/dL, and ≥220 mg/dL were significantly associated with CVD death, with hazard ratios of 1.3 (95% CI, 1.1-1.6), 1.8 (95% CI, 1.4-2.2), and 1.5 (95% CI, 1.2-2.0), respectively. Restricting the cohort to those with 10-year risk <5% did not diminish the associations of LDL-C and non-HDL-C with CVD mortality. CONCLUSIONS: In a low 10-year risk cohort with long-term follow-up, LDL-C and non-HDL-C ≥160 mg/dL were independently associated with a 50% to 80% increased relative risk of CVD mortality. These findings may have implications for future cholesterol treatment paradigms.


Assuntos
Doenças Cardiovasculares/patologia , LDL-Colesterol/sangue , Adulto , Doenças Cardiovasculares/mortalidade , HDL-Colesterol/sangue , Feminino , Seguimentos , Humanos , Estimativa de Kaplan-Meier , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Modelos de Riscos Proporcionais , Fatores de Risco , Triglicerídeos/sangue
10.
Prev Med ; 113: 57-61, 2018 08.
Artigo em Inglês | MEDLINE | ID: mdl-29753804

RESUMO

Low blood level of vitamin D and low physical activity have been linked to the development of cognitive impairment in older adults. The purpose of the present study was to examine the relationship between serum vitamin D and cognition as measured via the Montreal Cognitive Assessment (MoCA) in a healthy, older population. The study sample consisted of 4358 patients from the Cooper Clinic in Dallas, TX. All participants underwent a maximal graded exercise test to determine cardiorespiratory fitness (CRF). Cognitive impairment was defined as a MoCA score <25. Low vitamin D status was defined as serum 25-hydroxyvitamin D <30 ng/mL. Multivariable logistic regression analysis was employed to evaluate the association between vitamin D blood level and MoCA score. A low MoCA score was directly associated with higher age (OR: 1.75, 95% CI: 1.53, 1.99), and inversely associated with female sex (OR: 0.63, 95% CI: 0.51, 0.77), and years of education (OR: 0.87, 95% CI: 0.84, 0.91). When controlling for significant predictors (age, sex, and education), the low vitamin D group had a significantly greater likelihood of having a low MoCA score (OR: 1.26, 95% CI: 1.04, 1.51). The vitamin D effect remained significant when CRF was added to the model (OR: 1.23, 95% CI: 1.02, 1.48). In conclusion, low vitamin D was shown to be associated with cognitive impairment. Therefore, preventive measures such as vitamin D supplementation may play a protective role in memory loss and/or age-associated cognitive decline.


Assuntos
Cognição/fisiologia , Testes de Estado Mental e Demência/estatística & dados numéricos , Vitamina D/sangue , Fatores Etários , Aptidão Cardiorrespiratória , Estudos Transversais , Teste de Esforço , Feminino , Humanos , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Fatores Sexuais , Texas , Deficiência de Vitamina D/sangue
11.
Gerontology ; 64(5): 440-445, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29843126

RESUMO

BACKGROUND: Relatively little is known regarding the association between objective measures of physical function such as cardiorespiratory fitness (CRF) and cognitive function tests in healthy older adults. OBJECTIVE: To evaluate the relationship between CRF and cognitive function in adults aged 55 and older. METHODS: Between 2008 and 2017, 4,931 men and women underwent a comprehensive preventive physical exam at the Cooper Clinic in Dallas, Texas. CRF was determined by duration of a maximal treadmill exercise test. Cognitive function was evaluated with the Montreal Cognitive Assessment (MoCA). In a multivariate model, adjusted odds ratios with 95% confidence intervals for MoCA scores < 26 (i.e., cognitive impairment) were determined by using CRF as both a continuous and a categorical variable. RESULTS: The mean age of the sample was 61.0 ± 6.0 years; mean maximal MET values were 10.0 ± 2.2. Mean MoCA scores were 26.9 ± 2.2; 23.4% of the sample had MoCA scores indicative of cognitive impairment. The odds ratio for cognitive impairment was 0.93 (0.88-0.97) per 1-MET increment in CRF. When examined as a categorical variable, and using the lowest CRF quintile as the referent, there was a significantly reduced likelihood for cognitive impairment across the remaining ordered CRF categories (p trend = 0.004). CONCLUSION: The association between CRF and MoCA score in older adults suggests that meeting or exceeding public health guidelines for physical activity is likely to increase CRF in low fit individuals, maintain CRF in those with a moderate to high level of CRF, and thereby help to maintain cognitive function in healthy older adults.


Assuntos
Envelhecimento/fisiologia , Envelhecimento/psicologia , Aptidão Cardiorrespiratória , Cognição , Idoso , Disfunção Cognitiva/epidemiologia , Exercício Físico , Teste de Esforço , Feminino , Humanos , Estudos Longitudinais , Masculino , Testes de Estado Mental e Demência , Pessoa de Meia-Idade , Fatores de Risco , Texas/epidemiologia
13.
Nutr Cancer ; 68(1): 58-62, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26709868

RESUMO

We examined the association between omega-3 fatty acids (O3FAs) and prostate-specific antigen (PSA) in a cross-sectional analysis of 6219 men examined at the Cooper Clinic from 2009 to 2013. We assayed O3FAs from red blood cell membranes and measured PSA levels in study participants. Multiple logistic regression was used to examine the association between O3FAs and PSA. The mean age of study participants was 55.5 years (SD = 9.8) with a mean PSA level of 1.31 ng/mL (SD = 1.5). Unadjusted analyses indicated that there was a slight, direct association with PSA and each of the O3FAs tested. However, after adjusting for age and body mass index (BMI), the associations were reversed but nonsignificant [odds ratio (OR) for PSA > 4 ng/mL: total omega-3 OR = 0.98 per each 1% of total fatty acids, 95% confidence interval (CI) = 0.93-1.03; docosahexaenoic acid OR = 1.01, 95% CI = 0.92-1.11; omega-3 index OR = 0.99, 95% CI = 0.93-1.05). Similar results were obtained after age and BMI adjustment when the omega-3 index was divided into undesirable (0.01-3.99%), intermediate (4.0-7.99%), and desirable ranges ( ≥ 8.0%). Given that the study had >80% power to detect an odds ratio <0.9 or >1.1, we conclude that associations between O3FAs and PSA levels are either nonexistent or quite weak in the population that this healthy sample represents.


Assuntos
Ácidos Graxos Ômega-3/sangue , Idoso , Índice de Massa Corporal , Estudos Transversais , Humanos , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Antígeno Prostático Específico/sangue
14.
Prev Med ; 89: 178-183, 2016 08.
Artigo em Inglês | MEDLINE | ID: mdl-27261408

RESUMO

BACKGROUND: Chronic kidney disease (CKD) is a major public health problem, particularly in older age and in those with diabetes mellitus (DM), with high comorbidity and treatment costs. STUDY DESIGN: Prospective observational cohort study. SETTING & PARTICIPANTS: 17,979 participants, 22% women with a mean age of 50.0 (SD 8.8), in the Cooper Center Longitudinal Study (CCLS) seen initially between 1971 to 2009 who also received Medicare coverage from 1999 to 2009. PREDICTORS: Age, body mass index, blood pressure, cholesterol, glucose levels, current tobacco use, and cardiorespiratory fitness. OUTCOMES: Incident CKD and DM were determined from Medicare administrative claims data. RESULTS: During 116,973person-years of observation, 2022 cases of incident CKD occurred. Multivariable-adjusted proportional hazards models revealed a 24% lower risk of CKD among moderate fit (hazards ratio[HR] 0.76, 95% CI 0.67-0.85 compared to low fit) and a 34% lower risk of CKD among high fit (HR 0.66, 95% CI 0.58-0.76 compared to low fit). Even following the development of DM, fitness was associated with lower risk of CKD (HR 0.94, 95% CI 0.89-0.99) per 1-MET increment. LIMITATIONS: Relatively homogeneous population of well-educated Caucasians. CONCLUSION: Results of the present study suggest that higher fitness is associated with lower risk of CKD decades later even in at-risk populations such as diabetics. The findings support a role for enhancing fitness through regular physical activity in preventive strategies for CKD including those who may develop DM in later life.


Assuntos
Aptidão Cardiorrespiratória/fisiologia , Aptidão Física/fisiologia , Insuficiência Renal Crônica/epidemiologia , Insuficiência Renal Crônica/etiologia , Demandas Administrativas em Assistência à Saúde/estatística & dados numéricos , Diabetes Mellitus , Feminino , Humanos , Estudos Longitudinais , Masculino , Medicare , Pessoa de Meia-Idade , Estudos Prospectivos , Insuficiência Renal Crônica/prevenção & controle , Fatores de Risco , Estados Unidos
15.
Cereb Cortex ; 25(2): 396-405, 2015 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-23985135

RESUMO

Complex mental activity induces improvements in cognition, brain function, and structure in animals and young adults. It is not clear to what extent the aging brain is capable of such plasticity. This study expands previous evidence of generalized cognitive gains after mental training in healthy seniors. Using 3 MRI-based measurements, that is, arterial spin labeling MRI, functional connectivity, and diffusion tensor imaging, we examined brain changes across 3 time points pre, mid, and post training (12 weeks) in a randomized sample (n = 37) who received cognitive training versus a control group. We found significant training-related brain state changes at rest; specifically, 1) increases in global and regional cerebral blood flow (CBF), particularly in the default mode network and the central executive network, 2) greater connectivity in these same networks, and 3) increased white matter integrity in the left uncinate demonstrated by an increase in fractional anisotropy. Improvements in cognition were identified along with significant CBF correlates of the cognitive gains. We propose that cognitive training enhances resting-state neural activity and connectivity, increasing the blood supply to these regions via neurovascular coupling. These convergent results provide preliminary evidence that neural plasticity can be harnessed to mitigate brain losses with cognitive training in seniors.


Assuntos
Encéfalo/fisiologia , Cognição/fisiologia , Aprendizagem/fisiologia , Plasticidade Neuronal/fisiologia , Idoso , Envelhecimento/patologia , Envelhecimento/fisiologia , Encéfalo/irrigação sanguínea , Encéfalo/patologia , Mapeamento Encefálico , Circulação Cerebrovascular/fisiologia , Imagem de Tensor de Difusão , Feminino , Humanos , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Vias Neurais/patologia , Vias Neurais/fisiologia , Testes Neuropsicológicos , Descanso , Substância Branca/patologia , Substância Branca/fisiologia
16.
Prev Chronic Dis ; 13: E181, 2016 12 29.
Artigo em Inglês | MEDLINE | ID: mdl-28033088

RESUMO

INTRODUCTION: Objective estimates, based on waist-worn accelerometers, indicate that adults spend over half their day (55%) in sedentary behaviors. Our study examined the association between sitting time and cardiometabolic risk factors after adjustment for cardiorespiratory fitness (CRF). METHODS: A cross-sectional analysis was conducted with 4,486 men and 1,845 women who reported daily estimated sitting time, had measures for adiposity, blood lipids, glucose, and blood pressure, and underwent maximal stress testing. We used a modeling strategy using logistic regression analysis to assess CRF as a potential effect modifier and to control for potential confounding effects of CRF. RESULTS: Men who sat almost all of the time (about 100%) were more likely to be obese whether defined by waist girth (OR, 2.61; 95% CI, 1.25-5.47) or percentage of body fat (OR, 3.33; 95% CI, 1.35-8.20) than were men who sat almost none of the time (about 0%). Sitting time was not significantly associated with other cardiometabolic risk factors after adjustment for CRF level. For women, no significant associations between sitting time and cardiometabolic risk factors were observed after adjustment for CRF and other covariates. CONCLUSION: As health professionals struggle to find ways to combat obesity and its health effects, reducing sitting time can be an initial step in a total physical activity plan that includes strategies to reduce sedentary time through increases in physical activity among men. In addition, further research is needed to elucidate the relationships between sitting time and CRF for women as well as the underlying mechanisms involved in these relationships.


Assuntos
Aptidão Cardiorrespiratória , Exercício Físico , Obesidade/epidemiologia , Comportamento Sedentário , Adulto , Pressão Sanguínea , Doenças Cardiovasculares/epidemiologia , Estudos Transversais , Feminino , Humanos , Lipídeos/sangue , Modelos Logísticos , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Obesidade/prevenção & controle , Fatores de Risco , Autorrelato , Texas
18.
Gynecol Oncol ; 138(2): 394-7, 2015 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-26026734

RESUMO

BACKGROUND: Cardiorespiratory fitness (CRF), a strong predictor of mortality, is impaired among cancer patients. There is limited data, however, regarding CRF levels in women diagnosed with gynecologic cancers. METHODS: We compared CRF among ovarian, endometrial, and cervical cancer cases (n=89) to age-matched controls (n=89) in the Cooper Center Longitudinal Study (CCLS). CRF was evaluated by a maximal treadmill exercise tolerance test using a modified-Balke protocol. Conditional logistic regression was used to test for case-control differences in cardiorespiratory fitness, after controlling for age and body mass index, and adhering to the matched pairs design. RESULTS: The mean ages of cancer cases and controls were 50.9 years and 51.1 years, respectively (p=0.81). Peak METs (1 MET=3.5 mL kg(-1)min(-1)) were 9.2 ± 2.0 in cancer cases compared to 10.0 ± 2.2 in controls (p=0.03). When stratifying by type of cancer, peak METs were 8.9 ± 2.2, 8.4 ± 1.9, 9.5 ± 2.0 for patients with ovarian, endometrial, and cervical cancer, respectively. A gynecological cancer diagnosis was associated with greater odds of having 1-MET lower CRF compared to controls (OR 1.31, 95% CI: 1.05-1.64, p=0.018), after controlling for age and BMI. CONCLUSION: Gynecologic cancer survivors were more likely to have a 1-MET lower CRF than controls. Given a 1-MET change in CRF is associated with a significant, we advocate for more robust research regarding CRF in gynecologic cancer patients.


Assuntos
Fenômenos Fisiológicos Cardiovasculares , Neoplasias dos Genitais Femininos/fisiopatologia , Doenças Cardiovasculares/fisiopatologia , Estudos de Casos e Controles , Neoplasias do Endométrio/fisiopatologia , Neoplasias do Endométrio/terapia , Teste de Esforço , Feminino , Neoplasias dos Genitais Femininos/terapia , Humanos , Estudos Longitudinais , Pessoa de Meia-Idade , Neoplasias Ovarianas/fisiopatologia , Neoplasias Ovarianas/terapia , Estudos Prospectivos , Sobreviventes , Neoplasias do Colo do Útero/fisiopatologia , Neoplasias do Colo do Útero/terapia
20.
Ann Allergy Asthma Immunol ; 112(4): 329-32, 2014 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-24428963

RESUMO

BACKGROUND: Numerous studies involving patients with severe asthma have cited a relation between asthma and anxiety; this relation is responsible for decreased quality of life, increased morbidity, and higher health care usage. However, whether a link between milder asthma and anxiety exists remains unclear. OBJECTIVE: To determine whether asthma and anxiety share an association in a group of predominantly healthy adults. METHODS: Adults seen at the Cooper Clinic in Dallas, Texas from March 2000 through January 2013 for preventive medical examinations that included an extensive medical history, including a questionnaire regarding anxiety history, a physician-based physical examination, and laboratory and spirometric testing were used in the analysis. Multiple logistic regressions were used to determine the relation between asthma and anxiety. RESULTS: The sample consisted of 15,675 patients, of whom 1,403 (9%) had an asthma diagnosis. A sizeable majority of patients with asthma rated their health good or excellent, did not use an inhaler, and had a ratio of forced expiration volume in the first second to forced vital capacity greater than 70%. When controlling for covariates, milder asthma was significantly associated with anxiety (odds ratio 1.435, 95% confidence interval 1.238-1.663, P < .001). Smoking, a variable associated with asthma severity, was significantly associated with anxiety (odds ratio 1.432, 95% confidence interval 1.261-1.626, P < .001), although other variables, such as the ratio of forced expiration volume in the first second to forced vital capacity or use of an inhaled corticosteroid or combined inhaled corticosteroid and a long-acting ß agonist, were not significantly associated with anxiety. CONCLUSION: In this cohort of patients with predominantly mild asthma, there was a 43.5% increased risk of anxiety. All patients with asthma should be considered at a higher risk of anxiety and a target population for anxiety screening.


Assuntos
Ansiedade/epidemiologia , Asma/epidemiologia , Autorrelato , Adulto , Ansiedade/diagnóstico , Asma/diagnóstico , Progressão da Doença , Feminino , Nível de Saúde , Humanos , Masculino , Grupos Populacionais , Fatores de Risco , Fumar , Espirometria
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