Feasibility of a directly supervised telehealth-based exercise training program in patients with nonalcoholic steatohepatitis (Preprint)
BACKGROUND Most patients with nonalcoholic fatty liver disease (NAFLD) are physically inactive despite the well-known benefits of physical activity. Telehealth offers promise as a novel way to deliver an exercise training program and increase physical activity. However, the feasibility, safety and efficacy of telehealth-based exercise programs is unknown in patients with NAFLD. OBJECTIVE To determine the feasibility of a directly supervised exercise training program delivered to patients with nonalcoholic steatohepatitis (NASH), the progressive form of NAFLD, exclusively with telehealth. METHODS In response to COVID-19 research restrictions, we adapted an existing clinical trial and delivered 20-weeks of moderate-intensity aerobic training five days a week under real-time direct supervision using an audio-visual telehealth platform. Aerobic training was completed by walking outdoors or using a home treadmill. Fitness activity trackers with heart rate monitors ensured exercise was completed at the prescribed intensity with real-time feedback from an Exercise Physiologist. RESULTS Three patients with biopsy-proven NASH were enrolled with mean age of 52 +/- 14 years. Mean body mass index was 31.9 +/- 5.1 kg/m2. All subjects had metabolic syndrome. All subjects completed >80% of exercise sessions (mean 84 +/- 3%) and no adverse events occurred. Body weight (-5.1 +/- 3.7%), body fat (-4.4 +/- 2.3%) and waist circumference (-1.3 +/- 1.6 inches) all improved with exercise. Relative reduction in magnetic resonance imaging proton density fat fraction (MRI-PDFF) was 35.1 +/- 8.8%. Reductions in hemoglobin A1c -0.5 +/- 0.2% and HOMA-IR -4.0 +/- 1.2 were observed. Peak oxygen consumption (VO2 peak) improved by +9.9 +/- 6.6 mL/kg/min. CONCLUSIONS This proof of concept study found supervised exercise training delivered via telehealth is feasible and safe in patients with NASH. Telehealth-based exercise training also appears to be highly efficacious in patients with NASH but this will need to be confirmed by future large-scale trials. CLINICALTRIAL NCT03518294