Muscle strength and cross-sectional area in man. A comparison of strength-trained and untrained subjects
Deutscher übersetzter Titel: | Muskelkraft und Muskelquerschnitt beim Manne. Ein Vergleich von krafttrainierten und untrainierten Personen |
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Autor: | Maughan, R.J.; Watson, Jennifer S.; Weir, J. |
Erschienen in: | British journal of sports medicine |
Veröffentlicht: | 18 (1984), 3, S. 149-157, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 0306-3674, 1473-0480 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU198501022330 |
Quelle: | BISp |
Abstract
This study has examined muscle strength and cross-sectional area in a group of 35 healthy untrained male subjects and 8 subjects who had been engaged in a strenuous weight-training programme. The maximum voluntary knee extension force which could be produced by the untrained subjects was 742 +/- 100 N (mean +/- SD). The trained subjects could produce a significantly greater force (992 +/- 162 N). Cross-sectional area of the knee-extensor muscle group was 81.6 +/- 11.8 qcm in the untrained subjects and 104.1 +/- 12.3 qcm in the trained subjects. In the untrained subjects, a significant correlation existed between strength and muscle cross-sectional area (r = 0.56). In the same group of subjects, there was a significant inverse relationship between muscle cross-sectional area and the ratio of strength to cross-sectional area (r = -0.55). The mean ratio of strength to cross-sectional area was 9.20 +/1.29 for the untrained group whereas for the trained group this ratio was 9.53 +/- 1.01. It is suggested that the inverse relationship between strength per unit cross-sectional area and cross-sectional area results in part from an increased angle of pennation in the larger muscles. Verf.-Referat