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Lift chairs, which are also known as rise or recliner chairs, are chairs that feature a powered lifting mechanism that pushes the entire chair up from its base, and so assists the user to move more easily to a standing position. Lift chairs can be useful to the elderly, infirm, or disabled. They can aid comfort and mobility and also promote independence. Most lift chairs will work with weights up to although some can handle up to . ==Types== There are several basic varieties: * Two position: has a lift position and a slight recline position: as the user reclines in a two position lift chair, their back and thighs will stay at about 90 degrees; they do not recline for sleeping. * Three position: will recline to about 135 degrees, which allows most people to sleep. * Infinite position: allows the chair to go fully flat and the back and the feet to move independently. This type can sometimes allow the Trendelenburg position whereby the feet are higher than the heart. * Zero gravity position: similar to the infinite position models, they utilize two motors with the added ability to place the person seated into a 'zero gravity position' in which the person's legs are above his or her heart. This has the advantage of helping those with back problems, circulation issues, and or reduced lung capacity. 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「Lift chair」の詳細全文を読む スポンサード リンク
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