As our society becomes increasingly mechanized, more and more people are suffering from repetitive strain injuries. From debilitating carpal tunnel syndrome and tendinitis, to the chronic neck pain that everyone who works at a computer takes for granted, we are all showing the effects. Well, sometimes it is because the products are useless. Most consumers don't know enough about basic principles of movement to make informed choices.
Nobody regulates who can make that claim or what it means.
On the other hand, there are a number of aids out there that really can make your life easier - if you know how to use them. Remember, they are just tools to help you change, they are not the change itself. The most ergonomic environment in the world will not make as much difference as changing the way you think. We have grown accustomed to thinking of ourselves as if our bodies were machines, and our minds completely separate. We see illustrations that show our hearts as engines, our lungs as bellows, our brains as computers, and our joints as hinges.