The invention relates to a method for preparing oil-containing whole muscle meat-based products or reconstituted meat-based products, comprising the steps of injecting a quantity of brine (a) into meat piece(s) and tumbling the injected meat piece(s) together with oil and a quantity of brine (b), wherein the quantity of brine (b) and the oil are simultaneously added into a tumbler/massager. Further, the meat-based products obtained by this method are described.