So type one muscle basically contains a high concentration of myoglobin the special protein that carries oxygen in our muscles. Now myoglobin is similar to hemoglobin and that it carries the oxygen but it contains a different structure and myoglobin can only carry a single oxygen per myoglobin protein per myoglobin molecule. Now because our type one contains a high concentration of myoglobin it appears red under the microscope. Now our type one skeletal muscle also contains a very high concentration of mitochondria and when it breaks down ATP type one skeletal muscle breaks down ATP very slowly and as a result these are known as slow twitch muscles because they break down ATP slowly and that means these have a very low velocity of contraction. The contraction of type one muscles takes place relatively slowly and because of this they are actually slow to fatigue and contract slowly as mentioned earlier. Now where exactly in our body would we normally find type one skeleton muscle?