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1 Departments of Human Movement and Exercise Science and 4 Medicine, The University of Western Australia, Nedlands 6907; and 2 Cardiac Transplant Unit, 3 Department of Cardiology and West Australian Heart Research Institute, Royal Perth Hospital, Perth 6000, Western Australia, Australia
This
study examined the effect of a novel circuit weight training (CWT)
program on cardiorespiratory fitness, muscular strength, and body
composition in 13 patients with chronic heart failure (CHF), using a
prospective randomized crossover protocol. Peak exercise oxygen uptake
(
O2 peak) increased
after the 8-wk CWT program (19.5 ± 1.2 vs. 22.0 ± 1.5 ml · kg
1 · min1,
P < 0.01), as did exercise test duration (15.2 ± 0.9 vs.
18.0 ± 1.1 min, P < 0.001). Submaximal exercise heart rate
was lower after training at 60 and 80 W (121 ± 3 vs. 134 ± 5 beats/min, P < 0.01) as was rate pressure product, whereas
ventilatory threshold increased, from 52 ± 3 to 58 ± 3%
of O2 peak (P < 0.05). CWT also increased maximal isotonic voluntary contractile
strength for seven different muscle groups, from 392 to 462 kg (P
= 0.001). CWT, an exercise prescription specifically targeting
peripheral abnormalities in CHF, improves functional capacity and
muscular strength in these patients.
chronic heart failure; exercise training; peak oxygen uptake; maximal voluntary contraction; anthropometry
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