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Int J Sports Med 2013; 34(05): 391-397
DOI: 10.1055/s-0032-1323779
Physiology & Biochemistry
© Georg Thieme Verlag KG Stuttgart · New York

Cardiac Work Remains High after Strength Exercise in Elderly

A.C. C. Queiroz
1   Exercise Hemodynamic Laboratory, School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
,
H. Kanegusuku
1   Exercise Hemodynamic Laboratory, School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
,
M. R. Chehuen
1   Exercise Hemodynamic Laboratory, School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
,
L.A. R. Costa
1   Exercise Hemodynamic Laboratory, School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
,
L. F. Wallerstein
2   Neuromuscular Adaptation Laboratory, School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
,
V. J. Dias da Silva
3   Physiology Division, Biological Science Department, Federal University of Triângulo Mineiro, Minas Gerais, Brazil
,
M. T. Mello
4   Centre for Psychobiology and Exercise Studies, Federal University of São Paulo, São Paulo, Brazil
,
C. Ugrinowitsch
2   Neuromuscular Adaptation Laboratory, School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
,
C.L. M. Forjaz
1   Exercise Hemodynamic Laboratory, School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
› Author Affiliations
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accepted after revision 03 August 2012

Publication Date:
22 November 2012 (online)

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Cardiac Work Remains High after Strength Exercise in ElderlyInt J Sports Med 2013; 34(05): e2-e2
DOI: 10.1055/s-0032-1331707

Abstract

Moderate- to high-intensity strength training is recommended for healthy adults. In young subjects, a single session of strength training decreases blood pressure, while heart rate and cardiac work remain elevated afterwards. However, these effects have not been clearly demonstrated in elderly subjects. To investigate this issue, 16 elderly subjects each underwent a Control and an Exercise (3 sets, 8 RM, 9 exercises) session conducted in random order. Haemodynamic variables and heart rate variability were measured before and after the interventions. Systolic blood pressure did not change after the exercise session but did increase after the control session (+8.1±1.6 mm Hg, P≤0.05). Diastolic blood pressure, as well as systemic vascular resistance increased similarly after both sessions. Cardiac output and stroke volume decreased, while heart rate, rate-pressure product and the low- to high-frequency ratio of heart rate variability increased only after the exercise session ( − 0.5±0.1 L/min, − 9.3±2.0 ml,+3.8±1.6 bpm, +579.3±164.1 mmHg.bpm and +0.71±0.34, P≤0.05). Ambulatory blood pressure was similar after both sessions, while heart rate and rate pressure product remained higher after the exercise session for up to 4.5 h. After a single session of strength training, cardiac sympathetic modulation and heart rate remain elevated in elderly subjects, keeping cardiac work elevated for a long period of time.

Key words

aging - resistance training - cardiovascular load - haemodynamics - ambulatory blood pressure - autonomic modulation