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.
Time-domain heart rate variability indexes for the mean RR interval (RR), the SD of RR intervals (SDNN) and the square root of the mean squared differences of successive RR intervals (RMSSD). Data are presented as means with SEMs. U-HFD High-fat diet rich in unsaturated fatty acids
