TY  - RPRT
TI  - Heart rate variability and circulating catecholamine concentrations during steady state exercise in healthy volunteers.
AU  - H W Breuer
AU  - A Skyschally
AU  - R Schulz
AU  - C Martin
AU  - M Wehr
AU  - G Heusch
PY  - 1993
DO  - 10.1136/hrt.70.2.144
UR  - https://pubmed.ncbi.nlm.nih.gov/8038025/
ID  - 8038025
ER  -