Give your mind a good workout by taking the following quizdesigned to test your knowledge of fitness and nutrition. 1.Muscle is mainly made up of:A.WaterB.Protein(/’prutin/:蛋白质)C.FatD.Amino acids(氨基酸)Answer:A.Muscle is made up of 70percent water and 22 percent protein.2.Eating extra protein,especially in theform of amino acids,will stimulate mus-cle growth.A.TrueB.FalseAnswer:B.False.Only exercisestimulates muscle growth.Recent re-search shows that athletes may require a