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Strandpulling
Strandpulling is the general term for the practice of stretching steel springs, rubber cables or latex tubing, as a form of exercise and as a competitive sport, using a "chest expander", with many specific movements designed to target different muscles and provide progressive resistance usually, but not always, to the upper body. History In 1857, the Dublin Quarterly Journal of Medical Science claimed the modern chest expander was invented and patented by Henry Cost, but does not provide the year it was invented. The chest expander has been used for medical rehabilitation since at least 1851, and they have been used in some formal physical education programs since at least the 1880s. By the end of the 1800s, they were a common household exercise device, found in many affluent homes in parts of Europe. Strandpulling reached its height of popularity in the early 1900s, although they are still very commonly used as home-based exercise equipment. Design The chest expander comprises ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muscles
Skeletal muscles (commonly referred to as muscles) are organs of the vertebrate muscular system and typically are attached by tendons to bones of a skeleton. The muscle cells of skeletal muscles are much longer than in the other types of muscle tissue, and are often known as muscle fibers. The muscle tissue of a skeletal muscle is striated – having a striped appearance due to the arrangement of the sarcomeres. Skeletal muscles are voluntary muscles under the control of the somatic nervous system. The other types of muscle are cardiac muscle which is also striated and smooth muscle which is non-striated; both of these types of muscle tissue are classified as involuntary, or, under the control of the autonomic nervous system. A skeletal muscle contains multiple fascicles – bundles of muscle fibers. Each individual fiber, and each muscle is surrounded by a type of connective tissue layer of fascia. Muscle fibers are formed from the fusion of developmental myoblasts in a p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
