Search results for "Exercise."
showing 10 items of 3068 documents
Associations Between the Residential Environment and Physical Activity in German College Students and the Role of Self-Efficacy as a Mediator
2014
Social-ecological models suggest that influences on physical activity should be examined on multiple levels, but most of the empirical studies in this area have investigated the different levels separately. To integrate the different levels, we examined self-efficacy with respect to physical exercise as a mediator of the relation between environmental characteristics and physical activity. In a cross-sectional German study, 1,292 college students completed a questionnaire that included measures of their perceived residential environment, self-efficacy, and physical activity. Structural equation modeling was used to assess direct and indirect effects on physical activity. The cycling and wa…
Competing Effects Between Screen Media Time and Physical Activity in Adolescent Girls: Clustering a Self-Organizing Maps Analysis.
2016
Background:Previous research shows contradictory findings on potential competing effects between sedentary screen media usage (SMU) and physical activity (PA). This study examined these effects on adolescent girls via self-organizing maps analysis focusing on 3 target profiles.Methods:A sample of 1,516 girls aged 12 to 18 years self-reported daily time engagement in PA (moderate and vigorous intensity) and in screen media activities (TV/video/DVD, computer, and videogames), separately and combined.Results:Topological interrelationships from the 13 emerging maps indicated a moderate competing effect between physically active and sedentary SMU patterns. Higher SES and overweight status were l…
Effects of strength training on muscle power and serum hormones in middle-aged and older men.
2001
Effects of 16-wk strength training on maximal strength and power performance of the arm and leg muscles and serum concentrations [testosterone (T), free testosterone (FT), and cortisol] were examined in 11 middle-aged (M46; 46 ± 2 yr) and 11 older men (M64; 64 ± 2 yr). During the 16-wk training, the relative increases in maximal strength and muscle power output of the arm and leg muscles were significant in both groups ( P < 0.05–0.001), with no significant differences between the two groups. The absolute increases were higher ( P < 0.01–0.05) in M46 than in M64 mainly during the last 8 wk of training. No significant changes were observed for serum T and FT concentrations. Analysis o…
Different hormonal response to continuous and intermittent exercise in middle-distance and marathon runners
2008
In order to study the effects of different athletic backgrounds on exercise-induced hormonal responses, serum testosterone, luteinizing hormone, follicle-stimulating hormone and cortisol concentrations were measured before and after intensive continuous and intermittent running in well-trained middle-distance runners (MID) and marathon runners (MAR). They performed two 40-min exercises on a treadmill: a continuous run at an intensity of 80% [tempo run (TR)] and an intermittent run (IR) at an intensity of 100% of the velocity associated with VO(2max). The testosterone response to IR and the cortisol response to TR was higher (P<0.05) in MID compared with MAR. The testosterone response to IR …
Leisure-time physical activity for health promotion in elderly: initial evidence from the ‘‘Passiata Day’’ model
2018
Purpose: Falls prevention interventions are a priority for public health systems in order to reduce falls-related high costs. The University Hospital of Palermo promoted the ‘‘Passiata Day’’ model, an initiative of the Department of Geriatrics that provided a 1-h walk for once a week in a park of Palermo. It was guided by a graduate in physical education and a medical doctor. The aim of this study was to evaluate posturographic parameters in a sample of elderly including a group of subjects that had been walking regularly in the ‘‘Passiata Day’’ model for 6 months and a group of sedentary elderly subjects. Methods: A number of 109 older people were recruited at the University Hospital of Pa…
Rilevazione statistica della diffusione e della conoscenza di sostanze dopanti, integratori e dell' Exercise Addiction
2014
I benefici derivanti dalla pratica dell'esercizio fisico sono stati ampiamente documentati. Tuttavia, l’eccessivo ricorso alla attività fisica può condurre alla messa in atto di pattern compulsivi di allenamento che possono evolversi in una vera e propria patologia: l' exercise addiction. Studi recenti suggeriscono l'espansione di due fenomeni: il doping amatoriale e l'abuso di integratori per lo sport. Sono stati somministrati 686 test. I partecipanti allo studio sono stati scelti tra studenti di scuola media superiore, studenti universitari e frequentatori di ambienti sportivi. Il 42,5% degli intervistati dichiara di assumere sostanze per migliorare le prestazioni sportive e quindi di dop…
Modifications of atrial natriuretic peptide and vasopressin peptides in the rat hypothalamic supraoptic nucleus during resistance training
2010
Many studies have demonstrated the involvement of atrial natriuretic peptide (ANP) and vasopressin (VP) in the homeostasis of body fluids, but few studies have regarded the hypothalamic magnocellular neurosecretory system during physical exercises. The aim of the present immunohistochemical work is to study the activity of ANP and VP secreting neurons of the hypothalamic supraoptic nucleus during and after resistance training. The study was carried out in Wistar rats trained by a physical resistance-type exercise, using a rung ladder and a varying load fastened to the tail of each rat; the exercise lasted 20 min everyday for periods of 15, 30 and 45 days. Animal groups were sacrificed at th…
Extracellular Vesicles: Delivery Vehicles of Myokines
2019
Movement and regular physical activity are two important factors that help the human body prevent, reduce and treat different chronic diseases such as obesity, type 2 diabetes, heart diseases, hypertension, sarcopenia, cachexia and cancer. During exercise, several tissues release molecules into the blood stream, and are able to mediate beneficial effects throughout the whole body. In particular, contracting skeletal muscle cells have the capacity to communicate with other organs through the release of humoral factors that play an important role in the mechanisms of adaptation to physical exercise. These muscle-derived factors, today recognized as myokines, act as endocrine and paracrine hor…
Effect of Exercise on Fatty Acid Metabolism and Adipokine Secretion in Adipose Tissue
2019
Increased physical activity is an optimal way to maintain a good health. During exercise, triacylglycerols, an energy reservoir in adipose tissue, are hydrolyzed to free fatty acids (FAs) which are then released to the circulation, providing a fuel for working muscles. Thus, regular physical activity leads to a reduction of adipose tissue mass and improves metabolism. However, the reduction of lipid reservoir is also associated with many other interesting changes in adipose tissue FA metabolism. For example, a prolonged exercise contributes to a decrease in lipoprotein lipase activity and resultant reduction of FA uptake. This results in the improvement of mitochondrial function and upregul…
European Week of Sport: innovative initiative of European Commission that inspires children to be active
2019
BAC KGROU ND: Estimates indicate that more than one third of European adults are inactive, despite the known benefits of physical activity. In 2015 the European Commission launched the European Week of Sport (EWoS), to encourage people to engage in sport and physical activity. The aim of this study was to evaluate if participation in the EWoS could motivate children to participate in physical activity in future. METHOD S: A total of 10,892 children (aged 6-14), from 6 EU cities (Palermo, Italy; Ankara, Turkey; Lousada, Portugal; Gardabaer, Iceland; Rijeka, Croatia; Albacete, Spain), were enrolled in sport activities (running sport event, extra hours of physical activity, seminars on physica…