You can buy a kneeling posture chair at your nearest Wal-Mart or off of their website. Here's a link to one of their featured kneeling posture chairs: http://www.walmart.com/ip/Ergonomic-Kneeling-Posture-Task-Chair/10996239
A backless chair is a type of chair that does not have a backrest. It requires the person sitting on it to have good posture to maintain balance and support themselves. Backless chairs are often used for short periods of time or for specific activities like playing music or art.
Fastrack 503 Deluxe Leather Posture Chair is an ergonomic desk chair.
When transferring a person from a chair to a wheelchair it is important to plant your feet firmly and bend slightly at the knees. This will help reduce the chance of getting hurt while transferring.
The kneeling chair is designed to mimic a posture similar to that of one standing.The Kneeling Chair places your body comfortably and naturally into the correct ergonomic position to alleviate pressure on the neck. it does help in relieving the pain.
Ergonomic chairs conform to a person's posture. Sitting comfortably in your office chair makes for a better work day and more productivity. It often causes backache to be sitting all day and a good chair sometimes gives that relief.
Good posture is when your back is straight, arms to your sides, feet flat on the floor. Bad posture is slumped in your chair, arms across your stomach, and barely opening your lungs.
A kneeling chair is ergonomically designed to encourage good/natural posture. Traditional chairs, especially those in the workplace, can force awkward posture that causes back pain. It is especially helpful for people with chronic back pain. When using a kneeling chair you sit at an angle with your knees against a pad. This helps with posture and back pain. For a picture check out Bizchair.com
They are supposed to help take the weight off of your spine and onto your knees. they also help with posture.
There are a few places a person can buy an inexpensive pod chair. Some of these places include Serenity Living Stores, Brookstone, Betty USA, and Post Furniture.
A stomach chair can help improve posture by encouraging proper alignment of the spine, which can reduce strain on the back muscles. This can lead to decreased back pain and discomfort.
from Newton's third law of motion, the action reaction pair is adapted to your question, thus f=f following that the force exeterd buy the chair on the person is equall to the force at gravity by the person.