Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Muscle biopsy cross section stained for myofibrillar ATPase after preincubation at pH 4.6. Type I, IIA and IIX muscle fibers are marked for illustration. Type I and II muscle fibre area, average fibre area, fiber type composition and myosin heavy chain (MHC) isoform composition was determined before and after the period of resistance training.
