Muscle filament spacing and short-term heavy-resistance exercise in humans.
J Physiol
; 409: 491-5, 1989 Feb.
Article
em En
| MEDLINE
| ID: mdl-2585299
ABSTRACT
1. Six weeks of a dynamic heavy-resistance training of the quadriceps muscle in healthy young men resulted in a continuous increase in muscle strength, in an increase in muscle cross-sectional area (significant only in the second half of the training period) and in an increase in radiological density of the muscle tissue of 3.1% (2P less than 0.001) in the first three weeks and 1.6% (2P less than 0.01) in the second three weeks. 2. The linear distance between myosin filaments (38.7 +/- 0.3 nm before, 38.7 +/- 0.4 nm after training; mean +/- S.E.M.) as well as the ratio of actin to myosin filaments (3.94 +/- 0.03 before, 3.86 +/- 0.06 after training) did not change with training. 3. These results refute the concept that the increases in muscle strength or radiological density during short-term heavy-resistance training are caused by changes in myofilament spacing.
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Exercício Físico
/
Músculos
Tipo de estudo:
Diagnostic_studies
Limite:
Adolescent
/
Adult
/
Humans
/
Male
Idioma:
En
Revista:
J Physiol
Ano de publicação:
1989
Tipo de documento:
Article
País de afiliação:
Suíça