Cardiac output differences in males and females during mild cycle ergometer exercise

Patiy Freedson, Victor L. Katch, Stanley Sady, Arthur Weltman

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


To Study sex differences in cardiac output during submaximum exercise, eight male and eight female subjects were matched on max Vo2 (l min-1 and ml kg-1min-1). Each subject performed one, eight minute submaximum bicycle ergometer test at 35% of Vo,.max (300 kpm min-1). At a steady state mean Vo2 of 0.96 I min-1, cardiac output was determined. Significant differences between men and women were observed (p< .05) in cardiac output, stroke volume and (av) O2 difference. The males had a lower cardiac output (1.75 l min-1) and stroke volume (17.2 ml beat:-1) and a higher (a-v) O2 difference (2.01 vol %). When these variables were expressed independent of lean body weight the above differences were nonsignificant. It was suggested that cardiac output differences between the sexes during mild exercise are due, in part, to differences in lean body weight.

Original languageEnglish (US)
Pages (from-to)16-19
Number of pages4
JournalMedicine and science in sports
Issue number1
StatePublished - 1979
Externally publishedYes


  • (A-V) O differences
  • Cardiac output
  • Exercise
  • Lean body mass
  • Sex differences
  • Stroke volume

ASJC Scopus subject areas

  • Physical Therapy, Sports Therapy and Rehabilitation
  • Orthopedics and Sports Medicine
  • Public Health, Environmental and Occupational Health


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