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.
Exercise response of an apparently healthy individual who performed the Bruce treadmill protocol to maximum capacity. HR, heart rate; RR, respiratory rate; TV, tidal volume; VCO2, volume of carbon dioxide output; VE, minute ventilation; VO2, volume of oxygen uptake
