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PubMed Journals Articles About "Life Time Fitness, Inc. Life Time Fitness, Inc." RSS

05:27 EST 22nd November 2018 | BioPortfolio

Life Time Fitness, Inc. Life Time Fitness, Inc. PubMed articles on BioPortfolio. Our PubMed references draw on over 21 million records from the medical literature. Here you can see the latest Life Time Fitness, Inc. Life Time Fitness, Inc. articles that have been published worldwide.

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Showing "Life Time Fitness Life Time Fitness" PubMed Articles 1–25 of 29,000+

Mutation load dynamics during environmentally-driven range shifts.

The fitness of spatially expanding species has been shown to decrease over time and space, but specialist species tracking their changing environment and shifting their range accordingly have been little studied. We use individual-based simulations and analytical modeling to compare the impact of range expansions and range shifts on genetic diversity and fitness loss, as well as the ability to recover fitness after either a shift or expansion. We find that the speed of a shift has a strong impact on fitness...


Frequency of achieving a 'fit' cardiorespiratory fitness level and hypertension: a cohort study.

Although maintaining cardiorespiratory fitness is encouraged to reduce the risk of hypertension, the level at, and length of time for which, individuals need to maintain fitness remains unclear. We examined the association between the frequency of achieving the recommended fitness levels of the 'Physical Activity Reference for Health Promotion 2013' and the risk of hypertension among Japanese men.

Expression of additive genetic variance for fitness in a population of partridge pea in two field sites.

Despite the importance of adaptation in shaping biological diversity over many generations, little is known about populations' capacities to adapt at any particular time. Theory predicts that a population's rate of ongoing adaptation is the ratio of its additive genetic variance for fitness, V (W), to its mean absolute fitness, W̅. We conducted a transplant study to quantify W̅ and standing V (W) for a population of the annual legume Chamaecrista fasciculata in one field site from which we initially sampl...


Associations of discretionary screen time with mortality, cardiovascular disease and cancer are attenuated by strength, fitness and physical activity: findings from the UK Biobank study.

Discretionary screen time (time spent viewing a television or computer screen during leisure time) is an important contributor to total sedentary behaviour, which is associated with increased risk of mortality and cardiovascular disease (CVD). The aim of this study was to determine whether the associations of screen time with cardiovascular disease and all-cause mortality were modified by levels of cardiorespiratory fitness, grip strength or physical activity.

The effects of short term detraining and retraining on physical fitness in elite soccer players.

The aim of this study was to examine the effects of aerobic high-intensity training with reduced volume and training cessation on body composition and physical fitness after the end of season and the time required to recapture physical fitness with intensified retraining following two weeks of detraining in elite soccer players.

Longitudinal Evaluation of Aerobic Fitness and Academic Achievement Among Schoolchildren.

Research is emerging suggesting that fitness not only improves health, but enhances academic achievement in children. Many studies have found the strongest correlation with academic achievement to be aerobic fitness. The purpose of this study is to examine the influence of aerobic fitness and academic ranking on the association between improvements in students' aerobic fitness and their academic achievement.

Dynamics in the Fitness-Income plane: Brazilian states vs World countries.

In this paper we introduce a novel algorithm, called Exogenous Fitness, to calculate the Fitness of subnational entities and we apply it to the states of Brazil. In the last decade, several indices were introduced to measure the competitiveness of countries by looking at the complexity of their export basket. Tacchella et al (2012) developed a non-monetary metric called Fitness. In this paper, after an overview about Brazil as a whole and the comparison with the other BRIC countries, we introduce a new meth...

The Association Between Self-Rated Fitness and Cardiorespiratory Fitness in Adults.

To assess criterion validity of a single item question on self-rated physical fitness against objectively measured cardiorespiratory fitness. From the Health2008 study 749 men and women between 30 and 60 years of age rated their fitness as excellent, very good, good, fair or poor. Cardiorespiratory fitness was estimated with the watt-max test. Agreement between self-rated and objectively measured physical fitness was assessed by Cohen's weighted kappa coefficient. Correlation was determined by Goodman & Kru...

Subtyping children with developmental coordination disorder based on physical fitness outcomes.

Children with Developmental Coordination Disorder (DCD) are known to have poor physical fitness. However, differentiating homogenous subgroups of DCD using fitness performance has not yet been established. Therefore the purpose of this study was to identify subtypes in children with and without DCD using measures of physical fitness.

Exercise for physical fitness, fatigue and quality of life of patients undergoing hematopoietic stem cell transplantation: a meta-analysis of randomized controlled trials.

The objective of this meta-analysis is to systematically review the evidence on effects of exercise interventions in comparison to usual care with respect to physical fitness, fatigue, quality of life, anxiety and depression in hematopoietic stem cell transplantation patients for a hematological malignancies. And we are more focused on the optimal opportunity to exercise in hematopoietic stem cell transplantation recipients.

Life-History Multistability Caused by Size-Dependent Mortality.

Body size is a key determinant of mortality risk. In natural populations, a broad range of relationships are observed between body size and mortality, including positive and negative correlations. Previous evolutionary modeling has shown that negatively size-dependent mortality can result in life-history bistability, with early maturation at small size and late maturation at large size representing alternative fitness optima. Here we present a general analysis of conditions under which such life-history bis...

The accessibility of fitness centers for people with disabilities: A systematic review.

Fitness centers could be ideal places for people with disabilities to engage in the recommended levels of physical activity for healthy well-being. However, one of the primary barriers to participation at fitness centers is an inaccessible built environment.

Detrimental effects of rhizobial inoculum early in the life of partridge pea, Chamaecrista fasciculata.

Mutualistic relationships with microbes may aid plants in overcoming environmental stressors and increase the range of abiotic environments where plants can persist. Rhizobia, nitrogen-fixing bacteria associated with legumes, often confer fitness benefits to their host plants by increasing access to nitrogen in nitrogen-limited soils, but effects of rhizobia on host fitness under other stresses, such as drought, remain unclear.

Host Plant Infection by Soybean Mosaic Virus Reduces the Fitness of Its Vector, Aphis glycines (Hemiptera: Aphididae).

Coevolutionary interactions between pathogens and their insect vectors can dramatically impact the fitness of herbivorous insects and patterns of plant disease transmission. Soybean mosaic virus (SMV) is a common disease in soybean production worldwide. Infected seed is the primary source of inoculum in fields and the virus is secondarily spread among plants by the soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), in a nonpersistent manner. In this study, we compared the biological fitness of ...

Fitness Mediates Activity and Sedentary Patterns Associations with Adiposity in Youth.

We aimed to examine the cross-sectional associations of patterns of sedentary time (ST) and moderate-to-vigorous physical activity (MVPA) with total fat mass index (FMI) and abdominal fat mass index (FMIabd) in children, and additionally, to analyze if cardiorespiratory fitness (CRF) mediated these associations.

Adding smoking to the Fardal model of cost-effectiveness for the life-time treatment of periodontal diseases.

Little is known about the financial costs that smoking adds to the life-time treatment of periodontal disease.

Predictors of Cardiorespiratory Fitness Improvements With Cardiac Rehabilitation: Lower Baseline Fitness With the Most to Gain, Gains the Most.

Fitness costs of Vip3A resistance in Spodoptera frugiperda on different hosts.

Fall armyworm, Spodoptera frugiperda, is a major target pest of the Vip3A protein. The fitness of Bt-resistant insects on refuges is an important factor in determining the speed of resistance development. Fitness costs associated with Bt resistance can vary among host plants. Here, we provide the first experimental evaluation of the interactions between non-Bt hosts and fitness costs of Vip3A resistance in S. frugiperda.

Environmentally induced development costs underlie fitness tradeoffs.

Local adaptation can lead to genotype-by-environment interactions, which can create fitness tradeoffs in alternative environments, and govern the distribution of biodiversity across geographic landscapes. Exploring the ecological circumstances that promote the evolution of fitness tradeoffs requires identifying how natural selection operates and during which ontogenetic stages natural selection is strongest. When organisms disperse to areas outside their natural range, tradeoffs might emerge when organisms ...

Non-linear relationships between the BMI and physical fitness in Polish adolescents.

Comparisons of physical fitness in normal weight and overweight/obese youth generally highlight the negative consequences of an elevated BMI. In contrast, several studies of children and adolescents highlight the importance of variation in indicators of physical fitness across the full spectrum of BMIs from low through high.

The RESTORE Randomized Controlled Trial: Impact of a Multidisciplinary Rehabilitative Program on Cardiorespiratory Fitness in Esophagogastric cancer Survivorship.

The Rehabilitation Strategies in Esophagogastric cancer (RESTORE) randomized controlled trial evaluated the efficacy of a 12-week multidisciplinary program to increase the cardiorespiratory fitness and health-related quality of life (HRQOL) of esophagogastric cancer survivors.

Quantitative measure of fitness in tri-trophic interactions and its influence on diet breadth of insect herbivores.

Herbivore-plant interactions should be studied using a tri-trophic approach, but we lack a quantitative measure of the combined effect of top-down and bottom-up forces on herbivore fitness. We propose the combination of the bi-trophic fitness slopes as a tri-trophic fitness measure. We use the relationship between fitness associated with top-down and bottom-up forces and the frequency of host-plant use to calculate the top-down and bottom-up fitness slopes, which we then combine to obtain three possible dir...

The Association Between Sustained Poor Quality of Life and Future Opioid Use in Inflammatory Bowel Disease.

Inflammatory bowel disease (IBD) is associated with poor quality of life and disability. The short inflammatory bowel disease questionnaire (SIBDQ) is validated to determine patients quality of life at single time points, or improvement over time. Few studies have evaluated if sustained poor quality of life is associated with future healthcare utilization patterns.

Mutation accumulation in populations of varying size: large effect mutations cause most mutational decline in the rotifer B. calyciflorus under UV-C radiation.

Theory predicts that fitness decline via mutation accumulation will depend on population size but there are only a few direct tests of this key idea. To gain a qualitative understanding of the fitness effect of new mutations we performed a mutation accumulation experiment with the facultative sexual rotifer Brachionus calyciflorus at six different population sizes under UV-C radiation. Lifetime reproduction assays conducted after ten and sixteen UV-C radiations showed that while small populations lost fitne...

Physical Activity, Cardiorespiratory Fitness, and Incident Glaucoma.

To examine the associations of physical activity and cardiorespiratory fitness (hereafter fitness) with incident glaucoma in a prospective observational study.


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