The study in question is an interventional study with nutritional intervention. The aim of the study is to evaluate whether the adoption of two different models of Mediterranean Diet, based on the different percentage of carbohydrates and lipids, associated with a program of moderate intensity aerobic physical exercise, in patients with obesity and NAFLD can exercise, after only 3 months, effects on: * specific aspects associated with NAFLD, such as the degree of hepatic steatosis and fibrosis; * circulating levels of molecules correlated with the degree of generalized and hepatic inflammation and the blood concentrations of metabolic and cardiovascular risk factors associated with abdominal obesity; * intestinal barrier; * body composition; * intestinal microbiota; * symptoms of IBS (irritable bowel syndrome) in patients with NAFLD.
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The effect of intervention on CAP value
Timeframe: at Baseline and after 90 days
The effect of intervention on FLI value
Timeframe: at Baseline and after 90 days
The effect of intervention on routine blood chemistry parameters, relating to NAFLD and fibrosis, nutritional status, inflammatory status and metabolic and cardiovascular risk
Timeframe: at Baseline and after 90 days
The effect of the intervention on the integrity of the intestinal barrier
Timeframe: at Baseline and after 90 days