Electrical stimulation of quadriceps femoris in an elite weight lifter: a single subject experiment
Deutscher übersetzter Titel: | Elektrostimulation des m. quadriceps femoris bei einem Gewichtheber der Spitzenklasse: ein Einzelexperiment |
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Autor: | Delitto, A.; Brown, M.; Strube, M.J.; Rose, S.J.; Lehman, R.C. |
Erschienen in: | International journal of sports medicine |
Veröffentlicht: | 10 (1989), 3, S. 187-191, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 0172-4622, 1439-3964 |
DOI: | 10.1055/s-2007-1024898 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU199205052801 |
Quelle: | BISp |
Abstract
The response to treatment of high intensity neuromuscular electrical stimulation (NMES) to both quadriceps femoris muscles as an adjunct to ongoing weight training was evaluated using a single subject experimental design. For an elite weight lifter weekly maximal measurements of snatch (S), clean and jerk (CJ), and front squat (SQ) were obtained over 4 months during which the subject weight trained daily for 3 h. The 1st month, baseline data were collected. After baseline measurements, a 1-month period of high-intensity NMES was added to the subjects weight training. NMES was then withdrawn for 1 month and administered once more for 2 weeks. Three quadriceps femoris muscle biopsies were taken, two during the initial baseline period and one just before the end of the first stimulation period. The results showed a significant and clear relationship between performance gains and NMES administration and withdrawal. Steep gains for S, CJ, and SQ were seen after 2 weeks of stimulation, with front squat showing a 20-kg increase within the 1st week of both stimulation periods. Muscle biopsy showed an increased type I fiber area, decreased type IIa and IIb fiber area, and an increase of type II fibers after NMES. The results of this study support the use of high-dose NMES as an adjunct to weight training in elite lifters. Verf.-Referat