For the medieval king of Denmark, see Harald Bluetooth. Bluetooth is a wireless technology standard for exchanging data over short distances (using short-wavelength UHF radio waves in the ISM band from 2.4 to 2.485 GHz) from fixed and mobile devices, and building personal area networks (PANs).
Stomach Muscle (Abdominal) Strain. Pulled stomach muscle is also called as abdominal muscle strain. This occurs when there is overstretching in one of the abdominal muscles such as the rectus abdominis, internal and external oblique. Most abdominal strains affect the rectus abdominis muscle; the muscle that runs down from the ribs to the pelvis in the middle of the abdomen. Abdominal strain can immediately cause pain to the area of the injured muscle.
Muscles are complex structures that cause movement in the body. There are three types of muscle in the body: 1  Heart muscle pumps blood (cardiac muscle).  Skeletal muscle moves the external body parts, like the arms and legs, neck, back, trunk, and the face.