This article includes a 2:02 video walkthrough.
Quick answer
Anthros doesn't use a seat slider. Instead, you sit at the depth that fits you and then bring the back supports to meet you. Shorter users turn the knobs until each support makes contact. Taller users can often leave the supports all the way back. Aim for at least two to three fingers of space between the front edge of the seat and your calves. A bit more space is fine.
Step by step
Start with both back supports all the way back.
Sit down at your desired seat depth, leaving at least two to three fingers of space behind your knees.
Turn the knobs to bring each back support forward until it makes contact with you.
If you're tall (around 6'4" and up), you may not need to bring the lower support forward at all.
Also called: seat slider, seat depth adjustment, seat too deep, legs hanging over the seat, tall users, short users.
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Video transcript
Hi, everybody. We're going to be talking about setting up the chair for seat depth regardless of your height, whether you're five foot tall or six foot six. It works the same way. The Anthros chair does not have what other chairs have, which is called a seat slider. We don't do that. This is different. You sit down on the chair, you sit to your desired seat depth, and then you bring the backs to meet you.
So if you sit down in the chair and you're shorter, there might be a space right here. So if you come only this deep in the chair, you're going to turn these knobs until each back comes in contact with you. If you're taller, you're going to bring these all the way back, and there's nothing wrong with starting with them all the way back. So you might not need to adjust this lower one at all if you're taller. I'm six foot one, and when I sit in the chair, I do one, two turns. This has only moved about half an inch. So if you're six foot four, five, six, go ahead. Just leave it all the way back. It's going to fit you just fine.
And I hear a lot of people who are taller as well going, "My legs are hanging over. Is that a bad thing? I heard you're only supposed to have two or three inches, or a few fingers, of space between here and your calf." And I'm telling you, from the medical community, having done wheelchair seating for so many years, it's something that we've lived by. And it's not for what you think. A lot of people go, "I need my calves this close to the seat." No, we tell you that rule because we don't want your calves touching the seat. If you're touching right here, you can be cutting off blood flow and not letting it circulate back up from your feet. So the two or three inches of gap is like a minimum of how much space I would like to have. If it's four or five inches, four or five fingers in front, that's not the end of the world.