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Registros recuperados: 8
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Alterations in muscular enzymes of horses competing long-distance endurance rides under tropical climate Arq. Bras. Med. Vet. Zootec.
Teixeira-Neto,A.R.; Ferraz,G. C.; Moscardini,A. R. C.; Balsamão,G. M.; Souza,J. C. F.; Queiroz-Neto,A..
This study tried to monitor the alterations of muscle enzymes activity - creatinokinase (CK), lactate dehydrogenase (LDH), and aspartate aminotransferase (AST) - in a group of horses that participated of 70 and 100km distance rides in five competitions of an annual endurance championship under tropical climate. Pre ride levels (U/l) were 245.13±9.84 for CK, 496.61±14.76 for LDH, and 328.95±8.65 for AST. When compared to these levels, the results revealed a significant decrease in all enzymes activities in the first moment of the rides. Peak levels, significantly different, were reached, immediately after rides by CK (413.591±50.75); 24 hours post rides by LDH (628.61±33.30); and 48 hours after rides by AST (389.89±16.96). Monitoring of recovery period...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Horse; Endurance; Enzymes; Muscle.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352008000300004
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Effects of caffeine on time to exhaustion in exercise performed below and above the anaerobic threshold BJMBR
Denadai,B.S.; Denadai,M.L.D.R..
Controversy still exists concerning the potential ergogenic benefit of caffeine (CAF) for exercise performance. The purpose of this study was to compare the effects of CAF ingestion on endurance performance during exercise on a bicycle ergometer at two different intensities, i.e., approximately 10% below and 10% above the anaerobic threshold (AT). Eight untrained males, non-regular consumers of CAF, participated in this study. AT, defined as the intensity (watts) corresponding to a lactate concentration of 4 mM, was determined during an incremental exercise test from rest to exhaustion on an electrically braked cycle ergometer. On the basis of these measurements, the subjects were asked to cycle until exhaustion at two different intensities, i.e.,...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Caffeine; Anaerobic threshold; Endurance; Lactate; Perceived exertion.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000400017
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Exercise intensity, but not electrolyte reposition, alters plasmatic cortisol and glucose levels of horses submitted to 30 and 60km distance endurance rides Ciência Rural
Teixeira-Neto,Antônio Raphael; Ferraz,Guilherme de Camargo; D'Angelis,Flora Helena de Freitas; Lacerda-Neto,José Corrêa de; Queiroz-Neto,Antonio de.
This study was aimed at comparing cortisol and glucose plasmatic levels in a group of trained horses submitted to 30 and 60km endurance exercises, at the average speed of 10 and 15km h-1, respectively. The horses were randomly divided in two groups, one treated, orally, with a hypertonic electrolyte paste before, during and after the tasks and the other used as control. Cortisol data revealed significant increase in the first moment when the intensity of the exercise was higher (15km/h) or with the prolongation of it (30km long), in the second moment to all groups. Glucose data remained constant during 30km ride; however after 20km distance, in 60km ride, it revealed a significant increase in control group, returning to basal levels in the subsequent...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Electrolytes; Endurance; Cortisol; Glucose.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782007000300021
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Heart rate variability in athletes and nonathletes at rest and during head-up tilt BJMBR
Martinelli,F.S.; Chacon-Mikahil,M.P.T.; Martins,L.E.B.; Lima-Filho,E.C.; Golfetti,R.; Paschoal,M.A.; Gallo-Junior,L..
The purpose of the present study was to determine if autonomic heart rate modulation, indicated by heart rate variability (HRV), differs during supine rest and head-up tilt (HUT) when sedentary and endurance-trained cyclists are compared. Eleven sedentary young men (S) and 10 trained cyclists (C) were studied. The volunteers were submitted to a dynamic ECG Holter to calculate HRV at rest and during a 70º HUT. The major aerobic capacity of athletes was expressed by higher values of <img src="/img/revistas/bjmbr/v38n4/Vo.gif">at anaerobic threshold and peak conditions (P < 0.05). At rest the athletes had lower heart rates (P < 0.05) and higher values in the time domain of HRV compared with controls (SD of normal RR interval, SDNN, medians): 59.1...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Endurance; Power spectral analysis; Heart rate variability; Autonomic heart rate modulation; Training bradycardia; Orthostatic stress.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000400019
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Ingestion of a moderate dose of alcohol enhances physical exercise-induced changes in blood lactate concentration BJMBR
Teixeira-Coelho,F.; Santos,D.F.C.; Santos,G.A.; Sousa,T.F.; Moreira,S.R.; Souza,M.V.C.; Wanner,S.P..
The consumption of alcoholic beverages influences carbohydrate and lipid metabolism, although it is not yet clear whether metabolism during physical exercise at different intensities is also affected. This was the objective of the present study. Eight young and healthy volunteers performed a treadmill test to identify the running speed corresponding to a lactate concentration of 4 mM (S4mM). At least 48 h later, they were subjected to two experimental trials (non-alcohol or alcohol) in which they performed two 1-km running sessions at the following intensities: 1) S4mM; 2) 15% above S4mM. In both trials, blood lactate, triglycerides, and glucose concentrations were measured before and after exercise. The acute alcohol intake increased triglycerides, but...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Endurance; Ethanol; Glucose; Lactate; Metabolism; Treadmill running.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2020000400601
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Oxidative profiles of endurance horses racing different distances Arq. Bras. Med. Vet. Zootec.
Siqueira,R.F.; Weigel,R.A.; Nunes,G. R.; Mori,C.S.; Fernandes,W.R..
Increased oxidative stress during prolonged endurance exercises may result in muscle damage, fatigue and decreased performance. An adequate stress response during training is critical to obtain improved results and high animal welfare standards. The aim of this study was to evaluate the red blood cell haemolysate concentrations of superoxide dismutase (SOD), glutathione peroxidase (GPx), reduced glutathione (GSH) and catalase (CAT) and the plasma concentrations of malondialdehyde (MDA) from endurance horses in different distances at high speed in a tropical climate. Fifteen horses were tested; five at 160km (18.54 - 17.16km/h race speed), five at 120km (21.53 - 17km/h race speed) and five at 80km (20.06 - 18.01km/h race speed). Blood samples were collected...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Horse; Oxidative stress; Endurance.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000200020
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Post-ride inflammatory markers in endurance horses Ciência Rural
Siqueira,Renata Farinelli de; Fernandes,Wilson Roberto.
ABSTRACT: The acute phase reaction occurs in response to diseases, surgical trauma and can happen after strenuous exercise, like long distance events. This study aimed to evaluate the Serum Amyloid A (SAA), pro-inflammatory interleukins (IL-1β and TNFα) and creatine phosphokinase (CK) after free speed races like physical stress markers in endurance horses. Blood of 21 trained horses that competed in tests of 80, 120 and 160km, was taken before and after race. There was a significant increase in CK and SAA after the race in all horses, as well as the anti-inflammatory interleukin IL-10. But when results were compared between the groups, only the SAA was different, being higher in 160km horses. There was no change in pro-inflammatory interleukins IL-1β and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Inflammation; Endurance; Horses..
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000701256
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Sprint swimming performance of juvenile European sea bass ArchiMer
Nelson, J; Claireaux, Guy.
Despite its potential for determining animal success in a variety of ecologically important situations, very little is known about the sprint swimming performance of fishes. To evaluate whether selection on sprint swimming performance occurs in the wild, one must first demonstrate measurable and reproducible variation of sprint performance. In this study, we employ a computer-controlled laser detection system to study the sprint performance of 75 juvenile European sea bass Dicentrarchus labrax raised under uniform conditions in the laboratory. This percichthyid is a prized sport and food fish in Europe and similar ecologically to the North American striped bass Morone saxatilis. Individual European sea bass were subjected to endurance swimming performance...
Tipo: Text Palavras-chave: Dicentrarchux labrax; Juveniles; Computer laser detection; Endurance; Metabolism; Swimming performance; Fish.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-887.pdf
Registros recuperados: 8
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