In Japan, knee joint pain in the elderly is mostly knee joint deformation syndrome. According to the survey of Japan's Ministry of health, health and labor, the total number of hospitalized patients is about 70000. The number of people who are first diagnosed in a day is about 2975, and about 900000 people are new to the disease in a year. Now, 12 million men and 18 million women are suffering from the disease in Japan.

膝的疼痛是由骨与骨之间的磨擦引起的。如果安装了"博士平衡"，能够形成间隙减轻疼痛。

型号：SS（22.0-23.0cm）;S( 23.5-24.0); M( 24,5-25.5); L(26.0-27.0cm); LL(27.0cm--  )

软式 适用于 想有效地实践于减肥，做运动，舒展运动步行的人士。

硬式 实用于o型腿或有o型腿的可能性，鞋的外跟有很大的磨损，感觉到膝关节有疼痛的人士。