If you go to the gym, you should eat small meals 5-6 times a day. It is necessary to exclude sugar and cakes, fried food from your diet. You need to consume more porridges, whole grain bread, meat, eggs, fruits, vegetables. Drink about 2 liters of water a day. In the morning and in the evening it is desirable to drink kefir (traditional fermented dairy in Russia and CIS). You shouldn't train more than 3 times a week. Long trainings can also do more harm, than benefit.