נק' מוניטין:
58,706
J Strength Cond Res. 2014 Jul 15. [Epub ahead of print]
Order effects of combined strength and endurance training on testosterone, cortisol, growth hormone and IGFBP-3 in concurrent-trained men.
Rosa C1, Vilaça-Alves J, Fernandes HM, Saavedra FJ, Pinto RS, Machado Dos Reis V.
Author information
Abstract
Concurrent training has been widely used in fitness centers in order to simultaneously optimize cardiovascular and neuromuscular fitness, and induce a high-energy expenditure. Therefore, the aim of this study was to compare the acute effects of two different orders of concurrent training on hormonal responses in concurrent trained men. Fourteen men (mean±SD: 24.7±5.1 years old) were randomly divided into 2 groups: endurance training followed by strength (ES, n= 7) and strength training followed by endurance (SE, n= 7). Serum concentrations of testosterone, cortisol, growth hormone and IGFBP3 were measured before and after both training orders. A significant interaction between exercise order and time was only found in the IGFBP-3 levels (p=0.022). The testosterone and IGFBP-3 concentrations significantly increased in the ES group after the exercise trainings (57.7 ± 35.1%, p = 0.013 and 17.0 ± 15.5%, p = 0.032, respectively), but did not change significantly in the SE group (15.5 ± 36.6%, p = 0.527 and -4.2 ± 13.9%, p = 0.421, respectively). Conversely, cortisol and growth hormone concentrations significantly increased in both ES (169.2 ± 191.0%, p = 0.021 and 13296.8 ± 13009.5%, p = 0.013, respectively) and SE (92.2 ± 81.5%, p = 0.017 and 12346.2 ± 9714.1%, p = 0.001, respectively) groups compared with baseline values. No significant correlations were found between the changes in the hormonal concentrations. In conclusion, these results suggest that immediately post-exercise testosterone and IGFPB-3 responses are significantly increased only after the ES order. Therefore, an ES training order should be prescribed if the main focus of the training intervention is to induce an acute post-exercise anabolic environment.
Order effects of combined strength and endurance training on testosterone, cortisol, growth hormone and IGFBP-3 in concurrent-trained men.
Rosa C1, Vilaça-Alves J, Fernandes HM, Saavedra FJ, Pinto RS, Machado Dos Reis V.
Author information
Abstract
Concurrent training has been widely used in fitness centers in order to simultaneously optimize cardiovascular and neuromuscular fitness, and induce a high-energy expenditure. Therefore, the aim of this study was to compare the acute effects of two different orders of concurrent training on hormonal responses in concurrent trained men. Fourteen men (mean±SD: 24.7±5.1 years old) were randomly divided into 2 groups: endurance training followed by strength (ES, n= 7) and strength training followed by endurance (SE, n= 7). Serum concentrations of testosterone, cortisol, growth hormone and IGFBP3 were measured before and after both training orders. A significant interaction between exercise order and time was only found in the IGFBP-3 levels (p=0.022). The testosterone and IGFBP-3 concentrations significantly increased in the ES group after the exercise trainings (57.7 ± 35.1%, p = 0.013 and 17.0 ± 15.5%, p = 0.032, respectively), but did not change significantly in the SE group (15.5 ± 36.6%, p = 0.527 and -4.2 ± 13.9%, p = 0.421, respectively). Conversely, cortisol and growth hormone concentrations significantly increased in both ES (169.2 ± 191.0%, p = 0.021 and 13296.8 ± 13009.5%, p = 0.013, respectively) and SE (92.2 ± 81.5%, p = 0.017 and 12346.2 ± 9714.1%, p = 0.001, respectively) groups compared with baseline values. No significant correlations were found between the changes in the hormonal concentrations. In conclusion, these results suggest that immediately post-exercise testosterone and IGFPB-3 responses are significantly increased only after the ES order. Therefore, an ES training order should be prescribed if the main focus of the training intervention is to induce an acute post-exercise anabolic environment.
