Stools & Drafting Chairs We feature this amazingly simple and popular chair because it helps you do what your mother always told you to, "Sit up Straight!". The Perfect Fit knee chair is easy on the budget, easy on space, and easy on the back. By easing your hips into a forward tilt position, the Perfect Fit chair encourages an upright posture that correctly aligns your back, shoulders, and neck. Buy this and join the legions of our customers who swear by this product's amazing benefits! Black steel frame with nylon casters. Available in Black fabric only. - Black steel frame with nylon casters - Manual height adjustment - Supportive polyurethane foam covered with durable fabric - Overall width: 18" - Overall depth: 29" - Height range: 21" to 28.5" - Seat size:17.5" x 12.5" - Knee cushion size:6.5" x 11" - Plus FREE 5 yr. warranty Available in Black Only. Free Shipping is available for all chairs delivered in the Contiguous US. Returned chairs must be in like-new condition.
Review our return policy for more information.by Dennis Zacharkow, PT A kneeling chair is a unique design of a forward-sloping seat without a backrest. In order to keep the buttocks from sliding forward on the seat, the sitter's legs are supported just below the knees by a large padded support. As a result, the sitter's lower legs are tucked under the seat. This sitting posture results in a more open thigh-to-trunk angle than when using more conventional chairs, along with a greater degree of knee flexion. Diffrient (1984) commented that the kneeling chair would most benefit those individuals who wanted to work in a forward-leaning posture over a desk. Among the disadvantages of this design, Diffrient mentioned that without a backrest one is unable to assume a backward-leaning posture and obtain back support. Therefore, the sitter is limited to forward-leaning and upright postures. Diffrient (1984) also mentioned the potential problems of constant pressure on the shins, and the fact that the sitter's feet are in a cramped position.
Thompson (1985) also referred to the potential problem with pressure on the knees, along with the awkward positioning of the toes. The possibility of increased discomfort in the knees and lower legs suggested by Diffrient (1984) and Thompson (1985) was also noted in the comfort ratings of university students after two hours of sitting in a kneeling chair (Porter and Davis, 1983). An extensive study by Drury and Francher (1985) involved the comfort ratings for a kneeling chair with a 15-degree forward slope to the seat. The kneeling chair was evaluated over a 2 1/2 hour session. Five one-half hour training periods were previously given to all the subjects in order to adjust to the kneeling chair. The comfort ratings showed that the greatest discomfort with the kneeling chair involved the legs and knees, and to a lesser extent the back and buttocks. For some individuals, a major problem involved difficulty getting into and out of the kneeling chair. According to Drury and Francher (1985):
"Despite the training given in use of this chair, the overall comfort was not particularly good. Results were worse in overall magnitude than the earlier prototype conventional chair tested, and discomfort increased with time-on-task rather than remaining level. Body parts affected by the novel chair were primarily the legs, particularly knees and shins. Knee discomfort, presumably from the acute knee angle, was noticeable. For this increased leg discomfort there was little or no corresponding decrease in back discomfort. Although subjects had the theory of the chair explained to them during training and tried to sit with a lordotic spine, they often slumped forward to give a kyphotic curve instead." Bridger (1988) found a common postural adaptation to the kneeling chair to be an "erect slumped" posture. In the "erect slumped" posture, "the trunk has tilted rearward about the hip joints, which have extended. The upper body is erect but the spine is flexed" (Bridger, 1988).
Another description for this "erect slumped" posture is a "postural depression," which refers to the hinging forward of the front of the rib cage towards the pelvis (Anderson, 1951; The same "postural depression" occurs when leaning against the backrest of most chairs, and also when leaning forward improperly. Proper support to the lower thoracic spine is the only way to correct this main postural fault of sitting: the "postural depression" or hinging forward of the front of the rib cage towards the pelvis (Zacharkow, 1988, 1998). Jobri L.L.C. is a leading manufacturer of ergonomic and orthopedic products. Along with our competitive prices, outstanding quality and friendly customer service, our wide product selection is unmatched. Key product types include: Orthopedic soft goods Ergonomic office chairs Fitness and massage aids Comfort cushions for seat and back Memory foam sleep products Back (Lumbar) support products Kneeling chairs were designed upon the ergonomic concept "A strong back is a healthy back".
By promoting good posture, the chairs strengthen the lower back muscles helping spinal alignment and support. Designed in the 1970's, kneeling chairs are recommended by medical professionals around the world. The chairs have a five year warranty and a maximum weight limit of 280 lbs. The Saddle Chair is designed to keep the pelvis in a natural position increasing comfort and keeping the body aligned. Ergonomic footrests promote proper body alignment, resulting in improved circulation from the footrest by elevating the feet and legs and removing pressure from the bottom of the thighs. Furthermore, it helps tilt the pelvis backward, reducing stress and strain on the back. Ergonomic footrests can be used with any type of chair, at home or in the office. Notebooks have now become part of everyday life, but contribute to poor posture, which can lead to back, neck as well as wrist strain. The COOLdock Notebook Stand enables the user to adjust the height and angle of the screen to set a correct alignment, for improved ergonomic positioning