Hydrogen is easily the most abundant element in the universe. It is found in the sun and most of the stars, and the planet Jupiter is composed mostly of hydrogen. On Earth, hydrogen is found in the greatest quantities as water.
Ling developed the system of massage and rhythmic movement called the âSweden movement treatment,â also referred to as âmedical gymnasticsâ or the âLing system.â8 Ling suffered from chronic health problems, including rheumatism. He discovered that his daily regimen of exercise and manual therapy had a beneficial effect on his health.
Historical Examples. In the muscular system nearly all contractions are involuntary. Mind and Body William Walker Atkinson. Our knowledge of the muscular system of fleas is very imperfect. The Flea Harold Russell. Gymnastics is the art of systematic training of the muscular system.