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[eng] Type 2 Diabetes Mellitus (T2DM) is the metabolic disorder that accounts for the presence of hyperglycemia within insulin resistance (IR). The International Diabetes Federation estimated in 2013 that 382 million people (8.3% of world society ) had diabetes and that this number is set to rise beyond 592 million people in the next 22 years. T2DM accounts for 90% of people with diabetes (WHO 1999). Obesity is considered a major risk factor for developing T2DM over time. The World Health Organization (WHO) stated in 2014 that more than 1.9 billion adults were overweight and of these, over 600 million were obese (body mass index (BMI) > 30 kg/m2). Besides healthcare costs, WHO projects that diabetes will be the 7th leading cause of death in 2030 (Mathers & Loncar 2006). Once T2DM is diagnosed, the first therapeutic approach is by lifestyle counselling consisting of an increase in physical activity and changes in the patient dietary habits. The aim of this project is to study and integrate the metabolic responses that regulate systemic glucose homeostasis. We are not aware of other works describing in a holistic way the different metabolic processes regulating glucose homeostasis in different tissues that play an important role during the development and onset of diet-induced T2DM. With this approach, we will gain more insight and a better knowledge of the metabolic alterations taking place during an obese state induced by high-fat diet, as well as assess the degree of reversibility that can be reached by undergoing a lifestyle intervention, known as “metabolic plasticity”. For this purpose a diet-induced obese animal model of T2DM is used …