Question: how many grams of carbs per kg to build muscle?
Answer: For a Mass Gain program we recommend about 4 – 5 grams of carbs per kg of body weight per day. For example, if you are an 80kg trainer with an average body fat of 15 – 20%, then you need 80 x 4 – 5 = 320 – 400 grams of good quality carbohydrate per day, which is quite an amount of food.