Muscular adaptations to computer-guided strength training with eccentric overload
Aims: In order to investigate the muscular adaptations to a novel form of strength training, 18 male untrained subjects performed 4 weeks of low resistance-high repetition knee extension exercise. Methods: Nine of them trained on a conventional weight resistance device (Leg curler, CON/ECC group),...
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| Hauptverfasser: | , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
September 2004
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| In: |
Acta physiologica Scandinavica
Year: 2004, Jahrgang: 182, Heft: 1, Pages: 77-88 |
| ISSN: | 1365-201X |
| DOI: | 10.1111/j.1365-201X.2004.01337.x |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1111/j.1365-201X.2004.01337.x Verlag, Volltext: http://onlinelibrary.wiley.com/doi/10.1111/j.1365-201X.2004.01337.x/abstract 
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| Verfasserangaben: | B. Friedmann, R. Kinscherf, S. Vorwald, H. Müller, K. Kucera, S. Borisch, G. Richter, P. Bärtsch and R. Billeter |
| Zusammenfassung: | Aims: In order to investigate the muscular adaptations to a novel form of strength training, 18 male untrained subjects performed 4 weeks of low resistance-high repetition knee extension exercise. Methods: Nine of them trained on a conventional weight resistance device (Leg curler, CON/ECC group), with loads equivalent to 30% of the concentric one-repetition maximum (1RM) for both the concentric and eccentric phase of movement. The other nine trained on a newly developed computer-driven device (CON/ECC-OVERLOAD group) with the concentric load equivalent to 30% of the concentric 1RM and the eccentric load equivalent to 30% of the eccentric 1RM. Results: Training resulted in significantly (P ≤ 0.05) increased peak torque and a tendency (P = 0.092) to increased muscle cross-sectional area for the CON/ECC-OVERLOAD but not the CON/ECC group, while strength endurance capacity was significantly (P ≤ 0.05) increased in the CON/ECC group only. RT-PCR revealed significantly increased myosin heavy chain (MHC) IIa and lactate dehydrogenase (LDH) A mRNAs, a tendency for increased MHC IIx mRNA (P = 0.056) and high correlations between the changes in MHC IIx and LDH A mRNAs (r = 0.97, P = 0.001) in the CON/ECC-OVERLOAD group. Conclusions: These results indicate a shift towards a more type II dominated gene expression pattern in the vasti laterales muscles of the CON/ECC-OVERLOAD group in response to training. We suggest that the increased eccentric load in the CON/ECC-OVERLOAD training leads to distinct adaptations towards a stronger, faster muscle. |
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| Beschreibung: | Vom Autor zitiert als: Increased expression of fast myosin heavy chain mRNA in human skeletal muscle after computer-guided strength training with eccentric overload Gesehen am 20.10.2017 |
| Beschreibung: | Online Resource |
| ISSN: | 1365-201X |
| DOI: | 10.1111/j.1365-201X.2004.01337.x |