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.
Graphs of fusion frequency versus fatigue index (A) and maximum tetanic tension (B). FF, Fast fatigable;FR, fast fatigue-resistant; FU, fast unclassified as to fatigue; SF, slow fatigable;S, slow; SR, slow fatigue-resistant; SU, slow unclassified as to fatigue. Legend also applies to Figures 4 and 5.
