Inclusion Criteria:  diagnosis of NAFLD, defined by the presence of hepatic steatosis with vibration controlled transient elastography (VCTE) controlled attenuation parameter (CAP) measurement over 240dB/m, or liver biopsy showing macrovesicular steatosis in ≥ 5% of hepatocytes. patients were 18 years and older, fluent in English (the program could only be conducted in English by the DPP-certified coach), able to meet program scheduling requirements, and able to participate in physical activity.  Exclusion Criteria:  additional causes of liver disease such as viral hepatitis, biliary obstruction, hepatocellular carcinoma, Wilson's disease, Budd Chiari Syndrome, autoimmune hepatitis, alcoholic liver disease or alcohol use (>20g/day women, >30g/day men), aspartate aminotransferase (AST) or alanine aminotransferase (ALT) values >300 U/L, using steatogenic medications (amiodarone, methotrexate, tamoxifen, and corticosteroids), pregnant, a history of liver transplantation.