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Isometric exercise device : ウィキペディア英語版 | Isometric exercise device
An isometric exercise tool is a device used to exercise most body parts including the wrist and is often used as part of physical therapy or in order to build muscle strength in a low impact manner. Devices can range in size from large bulky machines used by physicians to small hand-held devices that can be used by an individual. Isometric devices have been used for centuries. The first devices did not display the users' output; nowadays there are devices that can digitally output the users force. Before that some devices used an analog format. ==How it works== Isometric exercise tools perform exercises or strength test using static contraction of a muscle without any visible movement in the angle of the joint. This is reflected in the name; the term "isometric" combines the prefix "iso" (same) with "metric" (distance), meaning that in these exercises the length of the muscle does not change,〔(Article on static strength training )〕 as compared to ''isotonic contractions'' ("tonos" means "tension" in Greek) in which the contraction strength does not change but the joint angle does. New isometric exercise tools often used force gauges and a micro processor and then output the force onto an LCD screen or store the information later to be downloaded onto a computer.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Isometric exercise device」の詳細全文を読む
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