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Muscle Fiber Types of Elite Male and Female American Weightlifters
Başlık:
Muscle Fiber Types of Elite Male and Female American Weightlifters
Yazar:
Serrano, Nathan, author.
ISBN:
9780438054219
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (80 pages)
Genel Not:
Source: Masters Abstracts International, Volume: 57-06M(E).
Advisors: Andrew J. Gaplin Committee members: Pablo B. Costa; Robert G. Lockie.
Özet:
Success in the sport of weightlifting requires extensive muscle power. However, little is known about the skeletal muscle fiber type (FT) composition of elite competitive weightlifters. Moreover, no study to date has examined the FT of female strength or power athletes. Resting Vastus Lateralis muscle biopsies were taken from 21 athletes from the 2017 World Weightlifting Championship (WWC), and American Open Championship (AO) competitions. Participants included two Olympians with 3 combined Olympic attendances, 25 National records, and over 170 National/International medals over their combined careers. Individual fibers were mechanically isolated and analyzed for myosin heavy chain (MHC) content using SDS-PAGE and silver staining. The average FT was 22.4% +/- 9.6% MHC I, 4.5% +/- 3.2% I/IIa, 67.2% +/- 14.0% IIa, 5.8% +/- 10.0% IIa/IIx, and 0.1% +/- 0.5% I/IIa/IIx. There were no MHC IIx fibers. Females of ≥ 90 kg body mass and males ≥ 105 kg body mass accounted for 91% of the MHC IIa/IIx. The prevalence of MHC IIa fibers are the highest documented in the literature for females and are comparable to previous research in elite strength trained men. This could be a result of genetic inheritance or training history, but is most likely a combination of both. It also further supports the well-documented conclusions that trained individuals possess few hybrids (MHC I/IIa, MHC IIa/IIx, and MHC I/IIa/IIx) and rarely any pure MHC IIx fibers. These data can potentially be used for talent selection or individualized programming.
Notlar:
School code: 6060
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(691013.1) | 691013-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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