Stroke volume continuously increases during dynamic exercise to maximum oxygen uptake (V̇O2max) in endurance athletes

K. M. Gallagher, S. A. Smith, R. Q. Querry, P. B. Raven

Research output: Contribution to journalArticlepeer-review

Abstract

Five endurance trained (ET; 62 V̇O2max; 4 men/1 women) and five untrained (UT; 36 V̇O2max; 3 men/2 women) young adults performed incremental exercise on a cycle ergometer to volitional fatigue. Heart rate (HR; beats·min-1), cardiac output (Q̇c; L·min-1), V̇O2 (ml·kg-1·min-1) were measured and stroke volume (SV; ml·beat-1) was calculated (mean±SEM) Percent of V̇O2max 20% 40% 60% 80% 100% ET SV 106.9 ± 11 128.8 ± 12 136.5 ± 12 144.5 ± 14 155.2 ± 14 UT SV 69.0 ± 14 87.0 ± 14 94.3 ± 15 97.5 ± 16 103.2 ± 18 ET subjects had similar maximal HRs and significantly higher maximal Q̇cs and SVs compared to the UT subjects (P < 0.05) Regression slopes of SV from 40% to 100% VO2max were significantly higher in ET (0.43 ± 0.06) than UT (0.24 ± 0.08) subjects (P < 0.05). Since the UT subjects SV is known to plateau, we conclude that stroke volume continuously increases during dynamic exercise to V̇O2max in ET subjects.

Original languageEnglish (US)
Pages (from-to)A291
JournalFASEB Journal
Volume11
Issue number3
StatePublished - Dec 1 1997

ASJC Scopus subject areas

  • Biotechnology
  • Biochemistry
  • Molecular Biology
  • Genetics

Fingerprint

Dive into the research topics of 'Stroke volume continuously increases during dynamic exercise to maximum oxygen uptake (V̇O<sub>2max</sub>) in endurance athletes'. Together they form a unique fingerprint.

Cite this