Abstract
BACKGROUND: Fontan physiology is characterized by a single functional systemic ventricle that reduces cardiac output adaptation and exercise capacity. Peripheral muscle pump is crucial for venous return, and resistance training of the peripheral muscles may be particularly beneficial for cardiac function in these patients. This study explores the feasibility of a training programme including safety and effectiveness, maximal exercise capacity, cardiorespiratory endurance, and quality of life in a Fontan population. METHODS: Twelve Fontan patients (18-32 years old) with New York Heart Association functional classes I and II were recruited. The intervention was 12 weeks of home-based exercise programme of 3 sessions per week supervised online by a physiotherapist. Pre- and postintervention evaluations assessed lean body mass, segmental forces with a hand-held dynamometer, maximal oxygen consumption (VO(2)max), cardiovascular endurance, leg endurance with a 1-minute-sit-to-stand test, and quality of life with a 36-item Short-Form Survey. RESULTS: A total of 11 of 12 participants completed 35 of 36 workouts, exceeding our 80% threshold for completion. No adverse events were reported. Leg muscle strength increased significantly (knee extensors improved by 22.8 ± 22.8 N m [17.7%], P = 0.019). Despite no change in VO(2)max, endurance time showed a significant improvement of 5.3 minutes (72%). Perceived physical condition evaluated with a self-perception scale improved significantly. There was no significant difference in the lean body mass and in quality of life. CONCLUSION: In this small group of post-Fontan patients with mild functional impairments, we describe a structured, accessible, and feasible home-based resistance training programme that seems safe and show improvements in strength and perceived physical condition.