scholarly journals CrossTalk proposal: Prolonged intense exercise training does lead to myocardial damage

2013 ◽  
Vol 591 (20) ◽  
pp. 4939-4941 ◽  
Author(s):  
Eduard Guasch ◽  
Stanley Nattel
Keyword(s):  
Exercise Training ◽  
Myocardial Damage ◽  
Intense Exercise

scholarly journals Effects of stretching before intense exercise training on hematologic and cellular injury indices

2018 ◽  
Vol 22 (6) ◽  
pp. 301-305
Author(s):  
N. Lotfi ◽  
S. Mohamadi ◽  
M. Mirzaei-Takmil
Keyword(s):  
Exercise Training ◽  
Peak Power ◽  
Cell Injury ◽  
Cell Damage ◽  
Hematological Parameters ◽  
Anaerobic Power ◽  
Training Group ◽  
Intense Exercise ◽  
Post Test ◽  
Intense Training

Purpose: The aim of the study was to investigate the effect of stretching before intense exercise on hematologic parameters and cell injury. Subjects: The subjects of the present study were 12 adolescent members of the Kurdistan Province futsal team (age: 14.83 ± 0.38 years, height: 173.92 ± 5.90 cm, weight: 63.50 ± 7.94 kg, peak power: 459.42 ± 95.94 watts). The RAST test was used to estimate the anaerobic power and to create the training load. Indexes of blood including white and red blood cells, hemoglobin, hematocrit, platelet and the levels of CK and LDH enzyme activities were measured. Results: The results of the pre and the post tests showed that among hematological parameters and cell damage indexes, the red blood cell and hemoglobin in both groups and the level of LDH in the training group were not significantly changed (p>0.05). Other parameters in the pre-test and post-test measures were statistically changed (p<0.05). Conclusion: Based on the results of the present study, it seems that stretching before intense training decreases the cell damage and side effects of exercise training on the hematological factors.

scholarly journals Intermittent Hypoxia Exposure Can Prevent Reductions in Hemoglobin Concentration After Intense Exercise Training in Rats

2021 ◽  
Vol 12 ◽  
Author(s):  
Xiquan Weng ◽  
Hao Chen ◽  
Qun Yu ◽  
Guoqing Xu ◽  
Yan Meng ◽  
...  
Keyword(s):  
Body Weight ◽  
Food Intake ◽  
Exercise Training ◽  
Hematological Parameters ◽  
Hemoglobin Concentration ◽  
Hypoxic Exposure ◽  
Sprague Dawley ◽  
Intense Exercise ◽  
Hypoxia Exposure ◽  
Low Concentrations

Intense exercise training can induce low concentrations of hemoglobin, which may be followed by maladaptation. Therefore, it is important for athletes to prevent low concentrations of hemoglobin during intense exercise training. In this study, we explored whether different protocols of intermittent hypoxic exposure (IHE, normobaric hypoxia, 14.5% O2) could prevent the exercise training-induced reduction in hemoglobin concentration in rats. Six-week-old male Sprague-Dawley rats were subjected to progressive intense treadmill exercise training over three weeks followed by three weeks of training with IHE after exercise. IHE lasted either 1 h, 2 h, or 1 h + 1 h (separated by a 3-h interval) after the exercise sessions. Hematological parameters, including hemoglobin concentration [(Hb)], red blood cells (RBCs), and hematocrit (Hct), and both renal and serum erythropoietin (EPO) were examined. We found that intense exercise training significantly reduced [Hb], RBCs, Hct, food intake and body weight (P &lt; 0.01). Analysis of reticulocyte hemoglobin content (CHr) and reticulocyte counts in the serum of the rats suggested that this reduction was not due to iron deficiency or other cofounding factors. The addition of IHE after the intense exercise training sessions significantly alleviated the reduction in [Hb], RBCs, and Hct (P &lt; 0.05) without an obvious impact on either food intake or body weight (P &gt; 0.05). Increase in reticulocyte count in the rats from the IHE groups (P &lt; 0.05 or P &lt; 0.01) suggests that IHE promotes erythropoiesis to increase the hemoglobin concentration. Furthermore, the addition of IHE after the intense exercise training sessions also significantly increased the concentration of renal EPO (P &lt; 0.05), although the increase of the serum EPO level was statistically insignificant (P &gt; 0.05). The different IHE protocols were similarly effective at increasing renal EPO and preventing the training-induced decreases in [Hb], RBCs, and Hct. Collectively, this study suggests that IHE may be used as a new strategy to prevent intense exercise training-induced reductions in [Hb], and deserves future exploration in athletes.

scholarly journals EFFECTS OF REPETITIOUS INTENSE EXERCISE TRAINING ON RESTING SALIVARY IGA

1998 ◽  
Vol 47 (2) ◽  
pp. 245-251 ◽  
Author(s):  
TAKAYUKI AKIMOTO ◽  
TAKAO AKAMA ◽  
YASUKO KODA ◽  
TAKAHIRO WAKU ◽  
EISUKE HAYASHI ◽  
...  
Keyword(s):  
Exercise Training ◽  
Intense Exercise ◽  
Salivary Iga

INTENSE EXERCISE TRAINING AFFECTS ENDOTHELIUM-DEPENDENT AND -INDEPENDENT VASODILATION 1002

1997 ◽  
Vol 29 (Supplement) ◽  
pp. 175
Author(s):  
W. D. Franke ◽  
G. M. Stephens ◽  
P. C. Schmid
Keyword(s):  
Exercise Training ◽  
Intense Exercise

Effects of exercise training on regional adipose tissue metabolism in pregnant rats

1986 ◽  
Vol 250 (5) ◽  
pp. R837-R844 ◽  
Author(s):  
R. Savard ◽  
J. E. Palmer ◽  
M. R. Greenwood
Keyword(s):  
Adipose Tissue ◽  
Exercise Training ◽  
Cell Size ◽  
Intense Exercise ◽  
Fat Cell ◽  
Pregnant Rats ◽  
Adipose Tissue Weight ◽  
Retroperitoneal Adipose Tissue ◽  
Pup Development ◽  
Maternal Adiposity

To investigate the effects of intense exercise training on maternal adiposity and fetal development, normal lean Zucker (Fa/Fa) rats were divided into three groups: control nonpregnant (CNP), control pregnant (CP), and exercise-trained pregnant (TRP). Trained rats swam three continuous hours per day, 6 days/wk, throughout pregnancy. Food efficiency increased with pregnancy, the highest values being observed during the last trimester of the gestation period. On day 21, pup number, weight, and body composition were similar for CP and TRP. By day 21 of gestation, in both TRP and CP rats, inguinal adipose tissue weight, cell size, and lipoprotein lipase (LPL) activity increased; although TRP values were smaller (P less than 0.05). In CP rats, parametrial and retroperitoneal adipose tissue weights, cell size, and LPL activities increased throughout pregnancy, whereas TRP values were similar to CNP (P less than 0.05). Parametrial fat cell lipolysis showed, however, no effect of training. These results indicate that the extensive energy expenditure occurring during endurance training selectively reduced the dams' adiposity in a regionally specific fashion without any apparent alteration in pup development. The increased substrate utilization required by training during pregnancy did not, however, modify fat cell lipolysis but rather prevented lipid filling through suppression of LPL activity of some depots.

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