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.
There are also group routines consisting of two to six gymnasts, performing with a maximum of two apparatuses of their choice. Aerobic gymnastics. Aerobic gymnastics, also known as sport aerobics, involves the performance of routines by individuals, pairs, trios, or groups of up to six people. These routines typically emphasise strength, flexibility and aerobic fitness, rather than acrobatic or balance skills.