F B Ortega

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..There is no consistent evidence on whether the MS construct works in the same way in different populations and at different stages in life...

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..49, 1.64-3.79). We conclude that non-participation in LT-PA is associated with morning tiredness in male and female adolescents, while excessive TV watching is more associated with short sleep or morning tiredness depending on gender...

..To determine whether physical activity, sedentary activities, and/or cardiorespiratory fitness are related to waist circumference in adolescents, as previously reported in adults...

..To report sex- and age-specific physical fitness levels in European adolescents...

..05). These results suggest that for CVF comparisons and interpretation in adolescent populations, sexual maturation status and BF%, as well as the way to express the CVF, should be taken into account...

..To examine the reliability of a set of health-related physical fitness tests used in the European Union-funded Healthy Lifestyle in Europe by Nutrition in Adolescence (HELENA) Study on lifestyle and nutrition among adolescents...

..The aim of the present study was to determine the levels of several health-related physical fitness components with respect to chronological and biological age (sexual maturation status) in Spanish adolescents...

..To determine whether birth weight is associated with handgrip strength and cardiovascular fitness in adolescence and, if so, how these associations are influenced by current body composition...

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..The main purpose of this study was to examine whether meeting the current physical activity (PA) recommendations is associated with a healthier CVF level in adolescents...

..More studies involving children of different ages and from different regions in Scandinavia are needed...

..To examine the associations between physical activity (PA) and abdominal adiposity, as measured by waist circumference, in children and adolescents, and to test whether cardiovascular fitness (CVF) modifies these associations...

..Although cardiorespiratory fitness (CRF) is one of the strongest predictors of mortality, studies examining the relationship between well-being and survival seldom account for the possible effects of CRF...

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..The aim of the present study was to determine whether strenuous endurance exercise, performed under conditions in which the partial pressure of environmental oxygen varies constantly, can induce myocardial cell injury...

..Longitudinal studies can contribute to this goal. The present study aimed to identify factors in childhood that determine the development of overweight/obesity in adolescence...

..To examine whether physical activity influences the association between birth weight and insulin resistance in adolescents...

..Consequently, the common assumption that physical activity is a mediator in the relationship between short sleep durations and obesity is not supported by our findings...

..Study results suggest that these patterns may be different in women, but further research is required to confirm this...

..We studied the differences on physical fitness, fatness and cardiovascular profile in Spanish and Moroccan women...

..The present findings contribute to the understanding of the relationships between dietary factors and physiological health indicators such as CRF...

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..To examine the association of participation in physical sports activity during leisure time, sedentary behaviors, cardiorespiratory and muscular fitness, and weight status with cognitive performance in Spanish adolescents...

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..Adequate sleep is a critical factor for adolescent's health and health-related behaviors...

..This study explores the concurrent validity of a modified version of the long IPAQ (the IPAQ-A) for the assessment of physical activity among adolescents...

..The purpose of the present study was to analyze the association between isokinetic strength and field-based muscular fitness tests in youth...

..To examine the individual and combined associations of ApoE and MTHFR 677C/T polymorphisms with cognitive performance in adolescents...

..To describe the effects of chronological age and biological age (pubertal development) on serum lipid and lipoprotein levels, body mass index (BMI) and waist circumference in Spanish adolescents...

..To examine the associations of low-grade inflammation with objectively measured physical activity, cardiovascular fitness (CVF) and fatness in prepubertal children...

..We studied the differences on physical fitness, fatness and cardiovascular profile in Spanish and Moroccan women...

..In conclusion, not only overweight and obesity but also underweight seem to be determinants of health-related fitness in adolescents. The associations could be related to differences in body composition...

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..This study aimed: (i) to describe the patterns of commuting to school in urban Spanish adolescents; and (ii) to examine the associations between active commuting to school (ACS) and socio-economic factors...

..The feasibility and safety items assessed presented a successful answer. Therefore, the results indicate that health-related fitness tests administered by PE teachers are reliable, feasible and safe to be performed in the school setting...

..To investigate the usefulness of tenderness (tender points count (TPC) and algometer score) to characterise fibromyalgia (FM) severity and symptomatology in women...

..5 years...

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..Schools may play an important role by identifying children with low physical fitness and by promoting positive health behaviors such as encouraging children to be active, with special emphasis on the intensity of the activity...

..Due to a limited number of studies, inconclusive evidence emerged for a relationship between muscular strength or motor fitness and CVD risk factors, and between flexibility and low back pain...

..To examine the associations of physical activity (PA) at different levels and intensities and cardiorespiratory fitness (CRF) with a clustering of metabolic risk factors in children and adolescents with special consideration of body fat...

..The findings indicate that there is not a clear interaction effect of CRF in the association between PA and abdominal fat in adolescents, yet slightly stronger association was observed in the low fit group...

..We explored the associations between aerobic physical fitness with blood lipids and a composite index of blood lipids and fasting glycaemia in adolescents, analysing possible interactions with weight status...

..These findings could link the FTO gene with serum leptin and consequently with the control of energy balance. Leptin could be a possible intermediary contributing to the association between the FTO rs9939609 polymorphism and adiposity...

..Cigarette smoking among adolescents as well as the level of physical activity constitutes a public health care issue. The aim is knowing the relationship between cigarette smoking and practice of physical activity...

..In conclusion, the results suggest a hypothetical CVF level for having a low metabolic risk, which should be further tested in longitudinal and/or intervention studies...

..The objective of this study was to determine the effects of a 3-month Biodanza intervention in women with fibromyalgia (FM)...

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..To examine the association between cardiovascular fitness and homocysteine levels in adolescents...

..If they are related then the second aim was to derive a mathematic equation relating hand span and optimal grip span...

..In conclusion, the ALPHA fitness tests battery is valid, reliable, feasible and safe for the assessment of health-related physical fitness in children and adolescents to be used for health monitoring purposes at population level...

..54, 95% CI = 0.30-0.96, P < 0.05; and OR = 0.40, 95% CI = 0.22-0.74, P < 0.01, respectively). These findings suggest a role of breastfeeding in determining lower body explosive strength during adolescence...

..To examine the associations between inflammatory proteins and muscle strength and to determine whether this association varies between overweight and nonoverweight adolescents...

..To develop an artificial neural network (ANN)-equation to estimate maximal oxygen uptake (VO(2max)) from 20m shuttle run test (20 mSRT) performance (stage), sex, age, weight, and height in young persons...

..Such training programs would allow people to develop their maximum physical potential, improve their physical and mental health, and attenuate the negative consequences of aging...

..To provide current reference values for serum lipid and lipoprotein levels in Spanish adolescents according to age and sex...

..To examine the association between anthropometric measurements of total and central adiposity and blood pressure in school-aged children, and to study whether these associations are modified by the levels of cardiorespiratory fitness...

..To determine whether the level of physical activity or physical fitness (i.e., aerobic capacity and muscle strength) in Spanish adolescents influences lipid and metabolic profiles...

..The present study provides useful and relevant information indicating which elbow position, and which type of dynamometer, yield maximal handgrip strength in adolescents...

..This study was to examine the influence of socioeconomic status on fitness and fatness in Spanish adolescents...

..The back-saver sit-and-reach test can therefore be considered an appropriate and valid test for assessing hip and low-back flexibility in this age group. The back-saver sit-and-reach and sit-and-reach tests provide comparable values...

..The purpose was to describe the patterns of commuting to school in young people and to examine its associations with physical activity (PA) and cardiorespiratory fitness...

..It is unclear how much physical activity is necessary to prevent obesity during adolescence...

..The generalizability of the results is limited by the fact that the sample was not selected at random...

..To examine whether physical activity attenuates the effect of the FTO rs9939609 polymorphism on body fat estimates in adolescents...

..To determine the ability of handgrip strength test to discriminate between presence and absence of fibromyalgia (FM) and FM severity in women...

..Physical activity levels in girls are strongly related to the physical activity of any significant other, whereas physical activity levels in boys are only related to their male relatives' physical activity...

..Results demonstrate that MC are small and light, with lower body mass index, skinfolds, girth and breadth dimensions, and %BF than a reference group and other athletes, with high values of hand grip and lumbar isometric strength...

..8 %. We concluded that strenuous physical exercise partially performed under hypoxic conditions increases the susceptibility of plasma lipids to peroxidation in untrained subjects...

..To examine the association of muscular strength, as measured by handgrip strength test (HGs), with the presence/absence of fibromyalgia (FM) and FM severity in men...

..01), and this relationship remained significant after controlling for confounding variables (p < 0.05). Small body weight at birth may program lower FFM in adolescents carrying the Ala12 allele in the PPARgamma-2 gene...

..To assess the association between birth weight and body composition and fat distribution in adolescents, and to test the possible sex-specific effect in these relationships...

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..In conclusion, it is likely the differences between male and female in bone mass could be explained by differences in lean mass and physical fitness...