The Norwegian Ullevaal Model of cardiac rehabilitation is a novel high-intensity, interval-training program. The 4 patients with CHF in this case series who participated in this program experienced improvements in physical capacity and quality of life and had no adverse events. These results are consistent with recent evidence supporting the efficacy of high-intensity interval training in people with CHF. Randomized clinical trials are needed to evaluate the clinical efficacy of this group-based, high-intensity, aerobic interval-training program for patients with CHF.
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