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European Heart Journal 1996 17(6):854-863;
Copyright © 1996 by the European Society of Cardiology.
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© 1996 The European Society of Cardiology

A comparison of the effects of strength and aerobic exercise training on exercise capacity and lipids after coronary artery bypass surgery

D. Wosornu*,, D. Bedford{dagger} and D. Ballantyne{ddagger}

*Department of Cardiology, Selly Oak Hospital Birmingham B29 6JD England
{dagger}Department of Pathological Biochemistry Royal Infirmary, Glasgow
{ddagger}Department of Cardiology, Victoria Infirmary Glasgow G42 9TY, Scotland

Received 4 September 1995; accepted 23 October 1995.

Correspondence Dzifa Wosornu. MD, Department of Cardiology, Selly Oak Hospital, Birmingham B29 6JD, U.K.

Abstract

BACKGROUND: Coronary artery surgery improves symptoms and prognosis in patients with angina. Aerobic exercise rehabilitation improves exercise capacity and prognosis in cardiac patients. Strength exercise training has not been extensively studied.

DESIGN: We studied the effects of 6 months aerobic and strength exercise training after coronary artery surgery in 81 men, mean age 57 years.

RESULT: Treadmill time(s) increased by l30·3 (95% confidence interval 467·4 to 214·2) in the aerobic group; by 83·1 (0·9 to l65·3) in the strength group, and by 34·3 (–1 to 69·6 in the control group (P=0·04 control versus aerobic) after 3 months; and by l96·4 (112·2 to 280·7) in the aerobic group, by 122·7 (37·7 to 207·6) in the strength group and by 27 (– 40·4 to 94·4) in the control group (P=0·002, control versus aerobic, and P=0·03 control versus strength) after 6 months. The level of fitness improved more in the strengthtrained group, and there was a minor reduction in body weight and degree of fatness. There were no changes in lipoprotein levels. Aerobic exercise training causes early and sustained benefit in treadmill exercise capacity, while the effects of strength exercise training are later in onset. Exercise training alone did not influence lipid levels.

CONCLUSION: Cardiac rehabilitation programmes should be comprehensive, including advice on diet and other risk factor modifications in addition to exercise sessions involving aerobic and strength training elements.

Key Words: Strength training • aerobic training • exercise capacity • lipids


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