scholarly journals Blood lactate threshold reflects glucose responses in horses submitted to incremental exercise test

2008 ◽  
Vol 60 (1) ◽  
pp. 256-259 ◽  
Author(s):  
G.C. Ferraz ◽  
F.H.F. D’Angelis ◽  
A.R. Teixeira-Neto ◽  
E.V.V. Freitas ◽  
J.C. Lacerda-Neto ◽  
...  
2005 ◽  
Vol 10 (1) ◽  
Author(s):  
A. THOMASSIAN ◽  
M.J. WATANABE ◽  
A.L.G. ALVES ◽  
C.A. HUSSNI ◽  
J.L.M. NICOLETTI ◽  
...  

Com este estudo objetivou-se avaliar as alterações da concentração de lactato sanguíneo e determinar o V4 de cavalos da raça Árabe submetidos ao teste de exercício progressivo em esteira de alta velocidade. Onze eqüinos adultos foram submetidos a um período de condicionamento e ao teste de exercício progressivo em esteira de alta velocidade. Nas condições em que foi realizado o experimento foi possível concluir que o protocolo de exercício proposto para aplicação do teste padrão de exercício progressivo, mostrou-se eficaz na indução de respostas metabólicas e fisiológicas para várias intensidades de exercício de cavalos da raça Árabe durante o trabalho físico em esteira de alta velocidade. As concentrações de lactato sanguíneo elevam-se exponencialmente a partir da velocidade de exercício de 8,0m/s, determinada como o V4 para o presente estudo. Blood concentration of lactate and determination of V4 in Arabian horses during a incremental exercise test performed at a high-speed treadmill Abstract The purpose of this study was to evaluate the changes in the blood lactate concentrations and to determine the V4 in Arabian horses, submitted to incremental exercise test performed on a high-speed treadmill. Eleven adult horses underwent a conditioning period as well as incremental exercise test performed on a high-speed treadmill. Under the circumstances that the experiment was developed, it was possible to conclude that the results obtained during the incremental exercise test were useful to assess the horse’s metabolic capability. The blood lactate levels exponentially increase beyond the speed of 8.0 m/s, determined as the V4 for this study.


1996 ◽  
Vol 21 (3) ◽  
pp. 197-208 ◽  
Author(s):  
Lennart Gullstrand

Six highly trained male elite rowers performed five sets of intermittent exercise on a rowing ergometer at competition intensity. Each set consisted of eight cycles of 15 s work and 15 s rest (15/15). Each set was repeated at 30-s intervals. Oxygen uptake and heart rate were continuously measured during each set. During the period between sets, microsamples of arterialized blood were obtained and later analyzed for lactate concentration. On two separate days, each subject also performed a 6-min bout of "all-out " exercise and a continuous incremental exercise test to fatigue on the rowing ergometer. During the intermittent rowing, no significant differences were detected in any of the measured variables between sets. Heart rate, oxygen uptake, and blood lactate averaged 89, 78, and 32%, respectively, of peak values measured during the continuous incremental exercise test. It is concluded that with rowing, the investigated 15/15 intermittent exercise model demands relatively high aerobic loading and low glycolytic activity. This exercise protocol may be considered an alternative model for training which allows rowers to work for prolonged periods of time at or slightly above competition intensity. Key words: Intermittent exercise, blood lactate, heart rate, oxygen uptake


Author(s):  
Hanapi M. Johari ◽  
Brinnell A. Caszo ◽  
Victor F. Knight ◽  
Steven A. Lumley ◽  
Aminuddin K. Abdul Hamid ◽  
...  

2020 ◽  
Vol 16 (5) ◽  
pp. 387-394
Author(s):  
J.C. Alves ◽  
A. Santos ◽  
P. Jorge ◽  
M.P. Lafuente

This study aimed to evaluate the physiological, haematological and biochemical changes during a treadmill incremental exercise test (IET). Animals were submitted to five stages of 6 min each, at 6, 7, 8, 9 and 10 mph, at an inclination of 5%. Blood samples were collected at rest (T0), immediately after exercise (T5) and after a 20 min rest period (T6), to determine complete blood count, urea, creatinine, creatine kinase, aspartate aminotransferase, alanine aminotransferase, lactate dehydrogenase, total plasma protein, albumin, alkaline phosphatase (AP), cholesterol, triglycerides (Trig), Ca2+, Na+, K+ and Cl-. Blood lactate (BL), heart rate (HR), rectal temperature (RT) and glycaemia were measured at rest (T0), after each stage (T1-T5) and after the rest period (T6). Variations were recorded between T0 and T5 in red blood cells, haemoglobin, AP, Na+, K+ (P<0.01), Trig (P<0.05), Ca2+ and Cl- (P<0.02). Differences were observed in BL at T5 (P<0.02) and T6 (P<0.02), RT at T2-T6 (P<0.01), HR at T3-T5 (P<0.01) and glycaemia at T2-T4 (P<0.01) and T5 (P<0.05). This study is a novel description of the shifts of physical fit police working dogs during this IET protocol.


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