Experimental: Physical exercise and dietary intervention for NAFLD

The exercise program will consist of muscular strength and aerobic exercises; additionally, each session will start and end with low intensity warm-up and cool down periods. The program will be divided in months. Months 1-2, twice a week directly-supervised exercises group sessions, and 1 telehealth session. Months 3-6, once a week directly-supervised group session and twice a week home-based telehealth. Months 7-12, Monthly telephone support. Months 12, 24 and 36, All participants (control and intervention arms) will receive a full evaluation. In the dietary intervention, investigators proposed a diet rich in anti-inflammatory components, legumes and in dietary fiber. The baseline evaluation of nutritional condition includes: anthropometry, bioimpedance analysis, hepatobiliary ultrasound, Fibroscan,blood lipids, and a battery of metabolic markers and a diet survey, Automated Self-Administered 24-hour Dietary Assessment Tool (ASA24). Both interventions are performed in parallel.

No_intervention: Standard of care

Participants in the control arm first have a baseline evaluation of the nutritional condition, with anthropometry evaluation, bioimpedance analysis, hepatobiliary ultrasound, Fibroscan, blood lipids, a battery of metabolic markers, and a diet survey, Automated Self-Administered 24-hour Dietary Assessment Tool (ASA24). After the evaluation period, participants received one counseling session, including written material, with advice to follow a healthy diet rich in fruits and vegetables, whole-grain foods, low in salt and sugars, and recommendations for an exercise plan of at least 30 minutes of aerobic exercise three times a week.