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.
High frequency RR interval variability (ln msec2) at rest and in response to and recovery from cognitive and orthostatic challenge during sessions 1 (solid line), 2 (dotted line), and 3 (broken line) in the aerobic and strength training groups.
