Article

High-intensity interval training (HIT) as exercise therapy is
gradually implemented in cardiac rehabilitation as the cardiovascular benefits
from exercise is intensity dependent. However, in previous studies, HIT has been
performed with strict supervision. The aim of the study was to assess the
feasibility and effectiveness of different modes of HIT in cardiac
rehabilitation. DESIGN: a randomized clinical study. METHODS: Ninety participants
with coronary artery disease (80 men/10 women, mean age 57 +/- 8 years) were
randomly assigned to one of three exercise modes: group exercise (GE), treadmill
exercise (TE), or home-based exercise (HE). HIT was performed twice a week for 12
weeks with an exercise intensity of 85-95% of peak heart rate. The primary
outcome measure was change in peak oxygen uptake (peak VO2). RESULTS:
Eighty-three participants (92%) completed the intervention without any severe
adverse events. Peak VO2 increased from 34.7 +/- 7.3 to 39.0 +/- 8.0 ml/kg/min,
32.7 +/- 6.5 to 36.0 +/- 6.2 ml/kg/min, and 34.4 +/- 4.8 to 37.2 +/- 5.2
ml/kg/min in TE, GE, and HE, respectively. Mean group difference for TE vs. HE
was 1.6 ml/kg/min (95% confidence interval, CI, 0.7 to 3.1, p = 0.02), TE vs. GE
1.1 ml/kg/min (95% CI-0.5 to 2.5, p = 0.27), and GE vs. HE 0.6 ml/kg/min (95% CI
-1.0 to 2.1, p = 1). However, on-treatment analysis showed no significant
difference between groups. CONCLUSION: HIT was efficiently performed in three
settings of cardiac rehabilitation, with respect to target exercise intensity,
exercise attendance, and increase in peak VO2. Exercise mode was not essential
for exercise capacity.
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Langue : ANGLAIS