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| Registros recuperados: 18 | |
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| NETTO,ALINE OLIVEIRA; MACEDO,NATHÁLIA C.D.; GALLEGO,FRANCIANE Q.; SINZATO,YURI K.; VOLPATO,GUSTAVO T.; DAMASCENO,DÉBORA C.. |
| ABSTRACT Several studies present different methodologies and results about intensity exercise, and many of them are performed in male rats. However, the impact of different type, intensity, frequency and duration of exercise on female rats needs more investigation. From the analysis of blood lactate concentration during lactate minimum test (LacMin) in the swimming exercise, the anaerobic threshold (AT) was identified, which parameter is defined as the transition point between aerobic and anaerobic metabolism. LacMin test is considered a good indicator of aerobic conditioning and has been used in prescription of training in different exercise modalities. However, there is no evidence of LacMin test in female rats. The objective was to determine AT in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Exercise; Swimming; Anaerobic threshold; Lactate; Pregnancy; Rats. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000602749 |
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| Marinho,Daniel Almeida; Reis,Victor Machado; Vilas-Boas,João Paulo; Alves,Francisco Bessone; Machado,Leandro; Rouboa,Abel Ilah; Silva,António José. |
| The purpose of this study was to develop a three-dimensional digital model of a human hand and forearm to apply Computational Fluid Dynamics to propulsion analysis in swimming. Computer tomography scans of the hand and forearm of an Olympic swimmer were applied. The data were converted, using image processing techniques, into relevant coordinate input, which could be used in Computational Fluid Dynamics software. From that analysis, it was possible to verify an almost perfect agreement between the true human segment and the digital model. This technique could be used as a means to overcome the difficulties in developing a true three-dimensional model of a specific segment of the human body. Additionally, it could be used to improve the use of Computational... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Finite element modelling; Image processing; Computational fluid dynamics; Biomechanics; Swimming. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000200024 |
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| Evangelista,F.S.; Brum,P.C.; Krieger,J.E.. |
| Exercise training associated with robust conditioning can be useful for the study of molecular mechanisms underlying exercise-induced cardiac hypertrophy. A swimming apparatus is described to control training regimens in terms of duration, load, and frequency of exercise. Mice were submitted to 60- vs 90-min session/day, once vs twice a day, with 2 or 4% of the weight of the mouse or no workload attached to the tail, for 4 vs 6 weeks of exercise training. Blood pressure was unchanged in all groups while resting heart rate decreased in the trained groups (8-18%). Skeletal muscle citrate synthase activity, measured spectrophotometrically, increased (45-58%) only as a result of duration and frequency-controlled exercise training, indicating that endurance... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Exercise training; Swimming; Cardiac hypertrophy; Mice; Myocardium. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003001200018 |
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| Brito,A.F.; Silva,A.S.; Souza,I.L.L.; Pereira,J.C.; Silva,B.A. da. |
| Exercise is known to cause a vasodilatory response; however, the correlation between the vasorelaxant response and different training intensities has not been investigated. Therefore, this study evaluated the vascular reactivity and lipid peroxidation after different intensities of swimming exercise in rats. Male Wistar rats (aged 8 weeks; 250-300 g) underwent forced swimming for 1 h whilst tied to loads of 3, 4, 5, 6, and 8% of their body weight, respectively (groups G3, G4, G5, G6 and G8, respectively; n=5 each). Immediately after the test, the aorta was removed and suspended in an organ bath. Cumulative relaxation in response to acetylcholine (10−12-10−4 M) and contraction in response to phenylephrine (10−12-10−5 M) were measured. Oxidative stress was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aerobic exercise; Anaerobic exercise; Lipid peroxidation; Smooth muscle; Swimming; Vessel. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015001100996 |
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| Oleto,A.F.; Sousa,L.P.; Barreto,T.O.; Cruz,J.S.; Penaforte,C.L.; Magalhães,J.C.; Sousa-Franco,J.; Pinto,K.M.C.; Campi-Azevedo,A.C.; Rocha-Vieira,E.. |
| Our objective was to determine lipid peroxidation and nuclear factor-κB (NF-κB) activation in skeletal muscle and the plasma cytokine profile following maximum progressive swimming. Adult male Swiss mice (N = 15) adapted to the aquatic environment were randomly divided into three groups: immediately after exercise (EX1), 3 h after exercise (EX2) and control. Animals from the exercising groups swam until exhaustion, with an initial workload of 2% of body mass attached to the tail. Control mice did not perform any exercise but were kept immersed in water for 20 min. Maximum swimming led to reactive oxygen species (ROS) generation in skeletal muscle, as indicated by increased thiobarbituric acid reactive species (TBARS) levels (4062.67 ±1487.10 vs 19,072.48 ±... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Swimming; NF-κB; Interleukin-6; Interleukin-10; Thiobarbituric acid reactive species; Cytokine. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000600008 |
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| Maia,R.C.A.; Sousa,L.E.; Santos,R.A.S.; Silva,M.E.; Lima,W.G.; Campagnole-Santos,M.J.; Alzamora,A.C.. |
| Exercise training (Ex) has been recommended for its beneficial effects in hypertensive states. The present study evaluated the time-course effects of Ex without workload on mean arterial pressure (MAP), reflex bradycardia, cardiac and renal histology, and oxidative stress in two-kidney, one-clip (2K1C) hypertensive rats. Male Fischer rats (10 weeks old; 150–180 g) underwent surgery (2K1C or SHAM) and were subsequently divided into a sedentary (SED) group and Ex group (swimming 1 h/day, 5 days/week for 2, 4, 6, 8, or 10 weeks). Until week 4, Ex decreased MAP, increased reflex bradycardia, prevented concentric hypertrophy, reduced collagen deposition in the myocardium and kidneys, decreased the level of thiobarbituric acid-reactive substances (TBARS) in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 2K1C renovascular hypertension; Swimming; Baroreflex bradycardia; Heart and kidney adaptations; Oxidative stress. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015001101010 |
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| Blasco, Felipe R.; Mckenzie, David J.; Taylor, Edwin W.; Rantin, F. Tadeu. |
| Clarias gariepinus is a facultative air-breathing catfish that exhibits changes in heart rate (f(H)) associated with air breaths (AB). A transient bradycardia prior to the AB is followed by sustained tachycardia during breath-hold. This study evaluated air-breathing and cardiac responses to sustained aerobic exercise in juveniles (total length similar to 20 cm), and how exercise influenced variations in f(H) associated with AB. In particular, it investigated the role of adrenergic and cholinergic control in cardiac responses, and effects of pharmacological abolition of this control on air-breathing responses. Sustained exercise at 15, 30 and 45 cm s(-1) in a swim tunnel caused significant increases in f(AB) and f(H), from approximately 5 breaths h(-1) and... |
| Tipo: Text |
Palavras-chave: Adrenergic tone; Cholinergic tone; Heart rate; Swimming. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00367/47821/74728.pdf |
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| Faillettaz, Robin; Paris, Claire B.; Irisson, Jean-olivier. |
| Most demersal fishes undergo a dispersal phase as larvae, which strongly influences the connectivity among adult populations and, consequently, their genetic structure and replenishment opportunities. Because this phase is difficult to observe directly, it is frequently simulated through numerical models, most of which consider larvae as passive or only vertically migrating. However, in several locations, including the Mediterranean Sea, many species have been shown to swim fast and orient. Here we use a Lagrangian model to study connectivity patterns among three Mediterranean Marine Protected Areas (MPAs) and compare simulations in which virtual larvae are passive to simulations in which oriented swimming is implemented. The parameterization of behavior... |
| Tipo: Text |
Palavras-chave: Fish larvae; Behavior; Swimming; Connectivity; Dispersal; Mediterranean sea; Marine protected areas; Modeling. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00634/74618/74548.pdf |
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| Ozolina, Karlina; Shiels, Holly A.; Ollivier, Helene; Claireaux, Guy. |
| The European sea bass (Dicentrarchus labrax) is an economically important fish native to the Mediterranean and Northern Atlantic. Its complex life cycle involves many migrations through temperature gradients that affect the energetic demands of swimming. Previous studies have shown large intraspecific variation in swimming performance and temperature tolerance, which could include deleterious and advantageous traits under the evolutionary pressure of climate change. However, little is known of the underlying determinants of this individual variation. We investigated individual variation in temperature tolerance in 30 sea bass by exposing them to a warm temperature challenge test. The eight most temperature-tolerant and eight most temperature-sensitive fish... |
| Tipo: Text |
Palavras-chave: Aerobic scope; Climate change; Fish; Heart; Individual variability; Swimming. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00337/44827/44369.pdf |
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| Chatelier, Aurelien; Mckenzie, David; Prinet, Aurelie; Galois, Robert; Robin, Jean; Zambonino, Jose-luis; Claireaux, Guy. |
| Seabass were fed for 4 months with diets where the lipid was provided as either canola oil (CO), palm oil ( PO) or fish oil (FO), to generate diversity in their tissue fatty acid (FA) composition and investigate how this influenced major traits of exercise performance, cardiac performance and respiratory metabolism. In particular, based upon previous observations, we investigated the hypothesis that enriching the fish tissues with oleic and linoleic acids (OA, 18:1n-9 and LA, 18:2n-6, respectively) from the CO and PO diets would improve maximum exercise and cardiac performance, and increase aerobic metabolic scope. This proved to be the case; exercise respirometry on bass fitted with cardiac flow probes revealed that those fed CO and PO diets had a... |
| Tipo: Text |
Palavras-chave: Diet; Fatty acid; Cardiovascular performance; Metabolism; Swimming; Dicentrarchus labrax; Seabass. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1860.pdf |
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| Mauduit, Florian; Domenici, P.; Farrell, A. P.; Lacroix, C.; Le Floch, S.; Lemaire, P.; Nicolas-kopec, A.; Whittington, M.; Zambonino-infante, Jose-luis; Claireaux, Guy. |
| Human alteration of marine ecosystems is substantial and growing. Yet, no adequate methodology exists that provides reliable predictions of how environmental degradation will affect these ecosystems at a relevant level of biological organization. The primary objective of this study was to develop a methodology to evaluate a fish’s capacity to face a well-established environmental challenge, an exposure to chemically dispersed oil, and characterize the long-term consequences. Therefore, we applied high-throughput, non-lethal challenge tests to assess hypoxia tolerance, temperature susceptibility and maximal swimming speed as proxies for a fish’s functional integrity. These whole animal challenge tests were implemented before (1 month) and after (1 month)... |
| Tipo: Text |
Palavras-chave: Fish; Oil spill; Dispersant; Biomarkers; Physiological integrity; Ecological performance; Temperature; Hypoxia; Swimming; Growth. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00347/45828/45916.pdf |
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| Reyes Canino, R.; Siam, C.; Jiménez Hurtado, E.. |
| En los últimos años, el recurso jaiba ha manifestado una significativa caída en las capturas comerciales. Un inadecuado manejo en el esfuerzo pesquero, entre otras influencias antrópicas, han incidido negativamente en la conservación de la diversidad biológica en las áreas tradicionales de pesca. En el marco del Proyecto para la protección del Ecosistema Sabana-Camaguey (ESC), se fomentó una nueva forma de explotar este recurso en su estado de “jaiba blanda o suave” que se potencia como una viable alternativa de sostenibilidad así como una importante fuente de empleo y divisas. Este estudio expone los resultados de la pesca exploratoria de jaiba en los últimos años en la costa norte de Vila Clara, así como información estadística de las... |
| Tipo: Preprint |
Palavras-chave: Biodiversity; Swimming; Sustainability. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/4183 |
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| Registros recuperados: 18 | |
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