Concentric contractions: A concentric contraction is a type of muscle contraction where the length of the muscles shorten while undergoing tension. For example, when you pick up a curl bar and perform a biceps curl, the length of your biceps muscles shorten.
Here are just a few reasons why your baby may have blood in his stool: 1  An anal fissure, which is a small anal tear often caused by passing a hard stool. 2  A food allergy. 3  Maternal blood from delivery or from cracked, sore nipples.  An intestinal 1  infection. An intestinal disorder, such as colitis or intussusception.
So are pain and cramping, constipation or diarrhea, fatigue or weakness, narrow stools, nausea and vomiting. A bloody stool could be caused by gastritis, which is worsened by alcohol or caffeine consumption, and ... Intestinal ischemia is another potential cause of blood in stools ... Definition. A fecal occult blood test (FOBT) is a test to detect the presence of blood in the stool (feces). Reasons for Test. ... It may also used to detect blood in your stool if you are having abdominal pain, diarrhea, vomiting, decreased appetite, or other symptoms.