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Copyright of Revista Brasileira de Prescrição e Fisiologia do Exercício is the property of Instituto Brasileiro de Pesquisa e Ensino em Fisiologia do Exercicio and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Retos: Nuevas Perspectivas de Educación Física, Deporte y Recreación is the property of Federacion Espanola de Asociaciones de Docentes de Educacion Fisica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Brasileira de Prescrição e Fisiologia do Exercício is the property of Instituto Brasileiro de Pesquisa e Ensino em Fisiologia do Exercicio and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Introduction: Heat (H; =32°C) stress acutely worsens aerobic performance. However, H has emerged as a potential therapy to modulate muscle metabolism inducing aerobic phenotype and it is unknown the effects of training in this condition for long periods (> 4weeks) on muscle fiber type and trophism and intracellular pathways regulating muscle phenotype. Objective: To evaluate the morphological, metabolic and molecular adaptations in skeletal muscle induced by long-term aerobic physical training (APT) in H. Methods: Adult, male Swiss mice (40g) were divided in: 1) Sedentary (SED) mice kept in the temperate (T) environment (22°C;SED/T), 2) SED kept in H (32°C;SED/H), 3) mice trained (TRA) in treadmill (1h/day, 5days/week, 8weeks, 60% of maximum speed (Smax)) in T (TRA/T), and 4) TRA in H (TRA/H). All groups performed incremental load tests in T and H before (pre-training) and after 4 and 8 weeks of training. The liver and muscle glycogen content were measured by Anthrone method and mitochondrial activity. Muscle fiber types were determined by analyzing SDH activity and myosin-heavy chain (MyHC) isoforms by immunofluorescence techniques in histological slices. The content and activity of muscle proteins involved in protein synthesis/degradation (Akt/FoxO) and energy metabolism (AMPK-p38/PGC1a) were quantified by western blot (WB). All experimental procedures were approved by the Ethics Committee on the Use of Animals - CEUA-UFMG (220/2019). Results: In pre-training period, H impaired performance by reducing (~30%) SMAX. After 8weeks, although TRA/H exercised at al ower (26%) absolute intensity than TRA/T, SMAX were similarly increased (~22%) in both TRA groups compared with SED/T. The liver glycogen content also increased by ~34% in the TRA/T, TRA/H and SED/H groups when compared to SED/T. The skeletal muscle SDH activity increased ~9% in both TRA groups when compared with SED/T. SED/H group increased (~15%) cross sectional area (CSA) of oxidative fibers with no additional effects of TRA. The protein content of slow (type 1) and fast (type 2) MyHC by WB did not change in any condition, but % of type 2A fibers was higher (~16%) in both TRA groups than in SED/T group. The protein content of mitochondrial oxidative phosphorylation complexes (OxPhos) as well as mitochondrial membrane (TOM20) and the intracellular regulators of these organelles and oxidative fiber phenotype (i.e., AMPK-p38/PGC1a and TFEB) were not altered in any group. Molecular analysis revealed that TRA/H group reduced the content of FoxO1 (~30%; an inducer of proteind egradation and energy metabolism and an inhibitor of angiogenesis). Conclusion: Although exercise in H is performed at a lower absolute intensity, training in both environments similarly improved performance and increased the proportion of type 2A fibers, the activity of the mitochondrial enzyme SDH, and the hepatic content of glycogen. Thus, the similar improvement in physical performance of TRA in H and T appears to be due to a change in fiber type to a more oxidative phenotype. Furthermore, training in H could be used as a therapeutic approach to manage patients who were unable to perform moderate-high intensity exercise (i.e., obese and muscle-joint injured recovery) due to mechanical overload. [ABSTRACT FROM AUTHOR]

The article presents a study which aims to determine the differences in heart rate (HR) and perceived exertion (PE) between forward and backward walking (FW/BW) in treadmill in patients with hemiparesis. The study performed BW and FW tasks among 13 male and female adults with stroke. The study found that physical activity is more intense in BW which indicates that the activity can be used as alternative method on cardiopulmonary fitness.

The article presents a study which aims to verify the estimated maximum oxygen uptake and agreement between direct and predicted measurement by three different field tests. A maximal direct test (DT) in a treadmill and three field tests were performed among 12 subjects in the study. Results showed run/walk a mile (MILE) as the best performance and agreement to estimate the oxygen uptake and no significant difference between maximum oxygen uptake and the three field tests.

Copyright of Revista Brasileira de Prescrição e Fisiologia do Exercício is the property of Instituto Brasileiro de Pesquisa e Ensino em Fisiologia do Exercicio and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Background: Six minute walk test and treadmill test have been used to evaluate the functional limitations of peripheral artery disease patients. However, whether these tests are correlated remain poorly known. Objective: To analyze the relationship between the total walk distance (TWD) assessed in the six minute walk test and in the treadmill test in patients with peripheral artery disease and symptoms of intermittent claudication. Methods: Thirty-four patients (65.5 ± 8.9 yrs) of both genders (26 men 8 women) participated of the study. They performed the 6 minute walk test in a 30 meters hail and the treadmill test with a specific protocol, with an interval of at least 7 days between the tests. Pearson correlation coefficient was used for data analysis. Results: Significant correlation was observed between TWD assessed in the six minute walk test and in the treadmill test. (r=0.48, p<0.01). Significant correlation between the TWD assessed in the tests were observed in the patients with lower hemodynamic limb commitment (r=0.69; p=0.01), while in the patients with higher hemodynamic limb commitment the correlation was not significant (r=0.03, p=0.91). Furthermore, a significant correlation between TWD obtained in the tests was observed in patients with low (r=0.57; p=0.02), and high levels of adiposity (r=0.48, p<0.05). Conclusion: The results of this study shown that walking capacity obtained with the six minute walk test and treadmill test are correlated, except in the patients with higher limb hemodynamic commitment. [ABSTRACT FROM AUTHOR]

Copyright of Educação Física em Revista is the property of Educacao Fisica em Revista and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The objective of the study was to evaluate the influence of intense and progressive exercise performed on a high speed treadmill on the temperature of the skin of the face, neck, pastern, and hoof, including the crown, sole and wall. Five unshod Arabian horses were used, with a mean age of 8±0.7 years, two females and three males, average body weight of 420±10kg. The exercise intensity was determined by quantification of blood lactate concentrations. Temperatures were determined with thermography before, during and after exercise. The effect of exercise on the temperature of the anatomic structures studied was evaluated by ANOVA for repeated measures followed by Tukey test, with P 0.05. Blood lactate increased, especially at more intense speeds. There were decreases in temperature of the regions of the face, neck and pastern after the exercise, of the wall, crown and sole of the hoof during the effort. The temperature of the moving belt blanket bearing did not change at any time throughout the test exercise. It was found, indirectly, that the blood perfusion in the hoof decreased both during the aerobic and anaerobic phase of the exercise test. None of the effort intensities was able to change the temperature of treadmill moving belt. The temperature of the hoof reduced as a physiologic consequence of the exercise and returned to normal values after the end of the test. [ABSTRACT FROM AUTHOR]

The article presents a study which examines the relationship between physical fitness and repeated sprint ability (RSA) in soccer players. The study conducts incremental protocol on a treadmill, incremental intermittent running test and Bangsho test to analyze several physiological variables related to physical fitness including the peak velocity on treadmill (PVTRE) and RSA. It is found out that the type of protocol affects the relationship between aerobic fitness and RSA.

Copyright of Brazilian Journal of Pulmonology / Jornal Brasileiro de Pneumologia is the property of Sociedade Brasileira de Pneumologia e Tisiologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)