Polycythemia vera is a condition of unknown cause in which there is a. long-term increase in red blood cells and other types of cells. Another such condition is myelofibrosis, in. which the normal bone marrow is replaced by fibrous tissue (the connective tissue of the body).
Swimming is low impact. Unlike jogging or plyometric training, swimming is a way to fit cardio into your workout routine without putting stress on your bones, joints and muscles. This is a plus for swimmers of all ages and body types, but it's particularly beneficial for seniors and people with arthritis.
Arm circles are an effective dynamic stretch for swimmers because they raise blood pressure and improve muscle stamina lower body temperature for a higher intensity workout copy the movements performed during the activity expose the muscles to a different range of motion. Answers.