Thorn (letter) Thorn or Ã¾orn (Ã¾, Ã¾) is a letter in the Old English, Gothic, Old Norse and modern Icelandic alphabets, as well as some dialects of Middle English. It was also used in medieval Scandinavia, but was later replaced with the digraph th, except in Iceland, where it survives.
Hip internal rotation exercises are designed to strengthen the groin, or adductor muscles of the inner thigh. These muscles bring the legs together while the outer hip muscles, called abductors, pull the legs apart. Muscular strength and flexibility imbalances can occur between the outer hip muscles and the groin muscles. Exercises can promote internal hip rotation to correct these imbalances.
This is called antagonistic muscle action. The working muscle is called the prime mover or agonist. (it s in agony!) The relaxing muscle is the antagonist. The other main pair of muscle that work together are the quadriceps and hamstrings.The prime mover is helped by other muscles called synergists.These contract at the same time as the prime mover. They hold the body in position so that the prime mover can work smoothly.it s in agony!) The relaxing muscle is the antagonist. The other main pair of muscle that work together are the quadriceps and hamstrings. The prime mover is helped by other muscles called synergists. These contract at the same time as the prime mover.