2. Need of the muscle to remove the waste material in the muscle 3. Caused by a hard blow or a bump against a hard object. 4. An acute and sometimes devastating viral disease. 5. A painful contraction of a muscle. Using a great exertion Needs of muscles to maintain good muscle tone. A good practice to keep muscles in good condition. Exercises that increase the size and strength of muscles. A victim experiences mild symptoms of fever, headache, sore A muscle pulls​