Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 1986;55(2):137-41.
doi: 10.1007/BF00714995.

Exercise induced increases in muscle fiber number

Exercise induced increases in muscle fiber number

W J Gonyea et al. Eur J Appl Physiol Occup Physiol. 1986.

Abstract

The effect of weight-lifting, which induced muscular enlargement, on fiber number was tested in the flexor carpi radialis muscle by operantly conditioning 6 cats to flex their right wrist against increasing resistance for an average of 101 weeks. The left was used as a control. At the end of training, the cats were performing "one-arm" lifts with an average of 57% of their body weight. There was an 11% greater muscle weight (P less than 0.01) and 9% (P less than 0.02) more fibers in the exercised muscles from the right limb than in the left. This study using a different method, supports our earlier observations that prolonged weight-lifting exercise significantly increases the total number of muscle fibers.

PubMed Disclaimer

Similar articles

Cited by

References

    1. Anat Rec. 1985 Feb;211(2):133-41 - PubMed
    1. Exerc Sport Sci Rev. 1980;8:19-39 - PubMed
    1. Acta Physiol Scand. 1977 Jan;99(1):105-9 - PubMed
    1. J Appl Physiol Respir Environ Exerc Physiol. 1983 May;54(5):1292-7 - PubMed
    1. J Gerontol. 1970 Jan;25(1):23-9 - PubMed

Publication types

LinkOut - more resources