Figure 1.
Study design. LLTL, living low-training low; LHTL, living high-training low; HRmax, maximal heart rate; FIO2, fraction of inspired oxygen.
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.