TY  - RPRT
TI  - Jogging in middle-aged men: effect on cardiovascular dynamics.
AU  - R J Byrd
AU  - D P Smith
AU  - C B Shackleford
PY  - 1974
UR  - https://pubmed.ncbi.nlm.nih.gov/4842913/
ID  - 4842913
ER  -