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.
Rating of Perceived Exertion during the marathon. In the (a) group of runners the RPE increased once at the fifth km, in the (b) group runners RPE increased at the 15–20th km and (c) group runners RPE increased only at the 30th km. Among this last group, we notice runner 6 who had only one RPE increase for the entire marathon.
