The most important nutrients for the muscles are proteins
. A protein-rich diet supports muscle building in old age. Meals should contain both animal protein (e.g. from fish or low-fat dairy products) and vegetable protein (e.g. from soya, cereals, legumes or nuts). In combination with foods that provide complex carbohydrates, the body receives sufficient nutrients and the necessary energy for strength training. Whole foods, preferably unprocessed, also provide valuable fibre, vitamins and minerals. They are mainly contained in whole grain products, fresh fruit and vegetables.