Cardiac output, heart rate, arterial pressure and indirect left ventricular oxygen consumption have been measured in three subjects during isometric contractions (50 - 170 kg) of the plantar flexors until fatigue was reached and during walking on a treadmill. Cardiac output was linearly related to V(O2) for both exercises. However, for the same V(O2) Q was four times higher during isometric effort than during walking. In the last 15 s of static tasks, HR was linearly increasing to V(O2) and AP reached values of 160 and 125 Torr (systolic and diastolic, respectively) independently of V(O2). For comparable V(O2) in static and isotonic exercises myocardial O2 uptake was doubled during isometric rather than during the isotonic exercise.

Cardiac output and cardiac load during isometric exercise in man / A. Veicsteinas, M. Gussoni, V. Margonato, G. Ferretti. - In: BOLLETTINO DELLA SOCIETA' ITALIANA DI BIOLOGIA SPERIMENTALE. - ISSN 0037-8771. - 58:8(1982 Apr), pp. 457-461.

Cardiac output and cardiac load during isometric exercise in man

A. Veicsteinas
Primo
;
M. Gussoni
Secondo
;
V. Margonato
Penultimo
;
1982

Abstract

Cardiac output, heart rate, arterial pressure and indirect left ventricular oxygen consumption have been measured in three subjects during isometric contractions (50 - 170 kg) of the plantar flexors until fatigue was reached and during walking on a treadmill. Cardiac output was linearly related to V(O2) for both exercises. However, for the same V(O2) Q was four times higher during isometric effort than during walking. In the last 15 s of static tasks, HR was linearly increasing to V(O2) and AP reached values of 160 and 125 Torr (systolic and diastolic, respectively) independently of V(O2). For comparable V(O2) in static and isotonic exercises myocardial O2 uptake was doubled during isometric rather than during the isotonic exercise.
exercise ; heart ; heart output ; human cell ; isometric exercise ; muscle ; muscle isometric contraction ; static effort
Settore BIO/09 - Fisiologia
apr-1982
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/207680
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