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Influence of strength, endurance and concurrent training on the lipid profile and blood testosterone and cortisol response in young male wrestlers

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Mirghani S. J., Alinejad H. A., Azarbayjani M. A., Mazidi A., Mirghani S. A.
Baltic Journal of Health and Physical Activity
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2014
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vol. 6
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issue 1
7-16
EN
Background: There is little information regarding the effects of concurrent training (endurance and resistance training) on the fat profile, blood testosterone and cortisol response. The aim of the study was to investigate the effect of eight weeks of concurrent training on the fat profile, blood testosterone and cortisol response in young male wrestlers. Material/Methods: Twenty-four young male wrestlers voluntarily participated and were randomly assigned to three groups, namely: endurance training (ET, N=8), strength training (ST, N=8) and concurrent training (CT, N=8). The groups did their training programs three sessions per week. Results: The findings of this study showed that high-density lipoprotein cholesterol (HDL-C) decreased by 33.54% in the strength group (P=0.02). Total Testosterone (TT) experienced a decrease by 30.68% in the endurance group (P= 0.02) and by 41.55% in the concurrent group (P=0.02). Cortisol (cor) increased by 55.73% in the endurance (P=0.00) and by 41.55% in the concurrent (P=0.02) group, respectively. Testosterone- to-Cholesterol ratio (TT:Cor) decreased by 125.80% by and 78.12% in the endurance (P=0.00) and concurrent (0.04) groups, respectively. Conclusions: The results of this study showed that the decrease in HDL, an increasing trend in TT in the strength training group and also a decrease in TT and an improved lipids profile in the endurance and concurrent training groups can be a function of the training type.
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Strength Training Prior to Endurance Exercise: Impact on the Neuromuscular System, Endurance Performance and Cardiorespiratory Responses

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Conceição M., Cadore E. L., González-Izal M., Izquierdo M., Liedtke G. V., Wilhelm E. N., Pinto R. S., Reistenbach Goltz F., Dornelles Schneider C., Ferrari R., Bottaro M., Kruel L. F. M.
Journal of Human Kinetics
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2014
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vol. 44
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issue 1
171-181
EN
This study aimed to investigate the acute effects of two strength-training protocols on the neuromuscular and cardiorespiratory responses during endurance exercise. Thirteen young males (23.2 ± 1.6 years old) participated in this study. The hypertrophic strength-training protocol was composed of 6 sets of 8 squats at 75% of maximal dynamic strength. The plyometric strength-training protocol was composed of 6 sets of 8 jumps performed with the body weight as the workload. Endurance exercise was performed on a cycle ergometer at a power corresponding to the second ventilatory threshold until exhaustion. Before and after each protocol, a maximal voluntary contraction was performed, and the rate of force development and electromyographic parameters were assessed. After the hypertrophic strengthtraining and plyometric strength-training protocol, significant decreases were observed in the maximal voluntary contraction and rate of force development, whereas no changes were observed in the electromyographic parameters. Oxygen uptake and a heart rate during endurance exercise were not significantly different among the protocols. However, the time-to-exhaustion was significantly higher during endurance exercise alone than when performed after hypertrophic strength-training or plyometric strength-training (p <0.05). These results suggest that endurance performance may be impaired when preceded by strength-training, with no oxygen uptake or heart rate changes during the exercise.
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