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Tiptoe
:''This article addresses the posture. For habitual or pathological tiptoeing by children see Toe walking''.
Tiptoe (tiptoes or tippy toes) describes the human body posture and locomotion of removing the heel(s) of one or both feet from the ground. It is quite often used as a slang when the weight is placed on the balls of the feet, rather than literally the tips of the toes (which is very difficult), although it could still be used in that case (as in ballet).
==Kinesiology==
To go into tiptoe, the ankle must be flexed to raise the heel off the ground. This requires the engagement of the calf muscle, along with various other muscles in the foot and shin to stabilize the joint. Even with this, the form is often less stable, requiring the engaging of muscles within the torso and a better sense of weight for the person to stay balanced. There is generally some movement, even subtle, in the ankle, as holding it statically would make balance difficult, so it is the first to give.
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「Tiptoe」の詳細全文を読む
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