I don't have the foggiest idea about the specific history of zero gravity massage seats (otherwise called "repulsive force"), however I will try it dependent on my own involvement in back rub seats throughout the last 8-9 years, blended with a little restorative point dependent on my 19 years in the chiropractic calling. Zero-gravity has become a genuinely free term in the back rub seat industry lately. Everybody assumes that their seats are zero gravity. At the point when I take a gander at the seats that guarantee this component, I am somewhat astonished at what is viewed as zero gravity and keep thinking about whether it is only bogus promoting to get the zero gravity "swarm" to get tied up with a specific model since it has become such an expression among customers. History of Zero Gravity Massage Chairs The entire idea of zero gravity was presented by NASA for their space program. Human Touch, which is the biggest US maker of back rub seats, adjusted the zero-gravity idea to family unit seat configuration, first showed in their Perfect Chair line of seats. As indicated by Human Touch's site... Roused by the Neutral Body Posture concentrated by NASA during the Skylab program, the [Perfect Chair] zero gravity chair puts the body in an essentially weightless situation to give unwinding and least muscle pressure. In this specialist suggested position, the spine, hips, and knee joints are on or near the decent midpoint of the muscles. The thought behind the zero gravity situating is to ease the heat off the joints of the body where strain will in general happen because of the gravitational draw, for example low back, hips, upper back, neck, knees, and so on I couldn't say whether you know about this, however gravity is perhaps the most rebuffing powers of nature on the human body. On the off chance that your body isn't totally adjusted and adjusted, gravity will make your body pay. For instance, in the event that you have a forward head carriage and slumped shoulder pose, gravity is having a feed day on your spine. You will feel more exhausted in light of the fact that your body is battling the impacts of the gravitational "pull", also the way that your joints will destroy rashly, prompting degenerative joint pain and other fun musculo-skeletal conditions. In the event that you have at any point sat in a zero gravity seat, you totally comprehend the idea of "weightlessness" as it identifies with the situated position. Numerous individuals have disclosed to me that they can rest more easily in a zero gravity seat than they can in their standard bed. It is truly agreeable, especially for low back torment victims, as the seat situating eases the heat off of the low back region. Anyway, What IS Zero Gravity? Basically, zero gravity, as it identifies with the situated position, is having the seat of the seat slant up at a 30 degree point. That is it! That 30 degree slant has been set up to be, by engineers a lot more astute than I, the ideal situation for reenacted weightlessness of the human casing. Human Touch took that idea and applied it to the Perfect Chair model. At that point Human Touch took that model and applied it to a more massive back rub seat model, the HT-7450. Presently, interestingly, a back rub seat had the zero gravity include. This, joined with the back rub work, would give a degree of treatment up until now incredible in the back rub seat industry. Around this equivalent time, Sanyo came out with the exceptionally famous Sanyo 7700 back rub seat. A similar 30 degree slant of the seat, joined with knead treatment made this one more of the zero gravity rub seats. Both the Sanyo 7700 and the HT-7450 are well known seats for the two producers. I think the shifted seat makes them that well known. Zero Gravity Massage Chairs - False Advertising? All in all, for what reason are on the whole these different models professing to be zero gravity seats when their seats don't shift up at 30 degrees? I have no clue. Once more, I think it is only a promoting ploy to misuse the zero gravity "furor" that is current in the business. Try not to be tricked by cases of zero-gravity. Obviously, any back rub seat, if it has genuine zero-gravity, will be spectacular for you in your home or office and you will adore each moment of it. In any case, in the event that you are resolved to get one of the genuine zero gravity seats, purchaser be careful!