Resistance training and growth hormone (GH): effects on histology and typing of gastrocnemius muscle fibers
- 11.07.2023
- Research
Erschienen in:
- Verfasst von
- Robson Chacon Castoldi
- Ines Cristina Giometti
- Guilherme Akio Tamura Ozaki
- Thiago Alves Garcia
- Rafael Junges Moreira
- Cristiano Teixeira Mostarda
- Silvio Assis de Oliveira-Júnior
- William Dias Belangero
- José Carlos Silva Camargo Filho
- Erschienen in
- Sport Sciences for Health | Ausgabe 1/2024
Abstract
Purpose
The aim of this study was to investigate the effects of the application of GH and the realization of an RT protocol on the gastrocnemius muscle of Wistar rats using histological parameters.
Methods
In total, 40 male animals Wistar rats (were used, 60 days old) were distributed into four groups: control (C) [n = 10], control and application of GH (GHC) [n = 10], training (T) [n = 10], and training and application of GH (GHT) [n = 10]. The training period consisted of 4 weeks. The amount of 0.2 IU per kilogram of body mass (0.2 IU/Kg) of “somatotropin” (GH) was administered. The RT was composed of four series of ten jumps, performed three times a week, on non-consecutive days. Histological analyses were performed with Hematoxylin–Eosin (HE) and Nicotinamide Adenine Dinucleotide Tetrazolium Reductase (NADH-TR).
Results
A significant increase in body mass was verified in the animals in the GHT group after the first and second weeks of training (p < 0.05). An increase in the diameter of muscle fibers was observed in the GHC, T, and GHT groups of animals, especially in fast-twitch fibers (p < 0.05).
Conclusion
In conclusion, both GHT and T groups demonstrated hypertrophy of muscle fibers, mainly in fast-twitch fibers.
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- Titel
- Resistance training and growth hormone (GH): effects on histology and typing of gastrocnemius muscle fibers
- Verfasst von
-
Robson Chacon Castoldi
Ines Cristina Giometti
Guilherme Akio Tamura Ozaki
Thiago Alves Garcia
Rafael Junges Moreira
Cristiano Teixeira Mostarda
Silvio Assis de Oliveira-Júnior
William Dias Belangero
José Carlos Silva Camargo Filho
- Publikationsdatum
- 11.07.2023
- Verlag
- Springer Milan
- Erschienen in
-
Sport Sciences for Health / Ausgabe 1/2024
Print ISSN: 1824-7490
Elektronische ISSN: 1825-1234 - DOI
- https://doi.org/10.1007/s11332-023-01091-7
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