A desk with a motor, and a chair that never needed one

The desk came in a box long enough to bury a canoe in. My sister Katie spent a Saturday putting it together in Grandpa's den while he supervised from his chair, the gray steel office chair he's been rolling around since roughly the Reagan administration.

When she finished, he pressed the down button. The desk hummed, lowered itself, touched the armrest of his chair, stopped, and backed up about an inch.

He pressed it again. Same thing. It reversed like a dog that's just been told no.

"It's refusing," he said. "I've had this chair forty years, and the desk has an opinion about it."

Then he read the manual, front to back, which is how he reads everything. He found the section on collision detection, closed the booklet and nodded with real respect. "Smarter than the last three cars I bought."

What it says it does

A sit-stand desk is a desktop on an adjustable frame, so you can work sitting down and then raise it and work standing up. Most of the popular ones are electric. One or two motors in the legs lift the top, and a control box and keypad run the show. Many keypads have memory presets, so one tap sends the desk to your sitting height and another sends it to your standing height. Plenty of them also have collision detection, which stops and reverses the desk when it hits something. That's what met Grandpa's armrest.

There are cheaper routes too. A hand-crank desk does the same job with your arm instead of a motor. A desk converter sits on top of the desk you already own and lifts your keyboard and monitor.

The point isn't standing. It's switching. You sit a while, stand a while, and move more than you would parked in one position for eight hours. The basic setup advice is the same at either height: keyboard at about elbow level with your elbows near a right angle, shoulders relaxed, and the top of the monitor at or a little below eye level.

What Grandpa thinks it does

"I've owned a standing desk since 1961," he says. "It's called a workbench. It's never once needed a software update."

He calls the memory presets "floors." Preset one is the lobby. Preset two is the second floor. The first week, he pressed two and then stood there like he was waiting for the doors to open.

The app that reminds you to stand up got a long, slow look. "I already have a reminder to stand up. It's called the coffee pot. It goes off every forty-five minutes."

Then there's the anti-fatigue mat Katie bought to go with it. He stood on it, bounced twice and announced that the modern office worker needs a motor to stand up, a mat to stand on, and a chair for when the standing doesn't work out. "Somebody's selling all three," he said, "and he's doing fine."

Grandma pointed out that he's stood up every time the phone rang for fifty years without any motor at all. Which is true. She usually wins these.

Where he has a point

The motor and control box are the parts to worry about. A steel frame doesn't wear out sitting in a den. Electronics can. Before you buy, check whether the maker sells replacement control boxes, keypads and motors, and read owner reviews from a year or more in. Look for complaints about desks that stop responding or legs that rise unevenly. The same thinking applies to anything with a circuit board, which is why it pays to buy things you can keep running.

Wobble shows up at standing height. A desk that's rock-solid low can sway when it's extended. Owner reviews will tell you whether a model shakes when you type at full height. Add up what you'll put on it, monitors and arms included, and compare that to the maker's published weight capacity.

Cords need slack. A desk that rises 20 inches will yank anything pinned behind it. Mount a power strip to the underside of the desk so the cords travel with it, and leave one loose loop running to the wall.

You don't need the app. Some desks connect to your phone. Make sure every function you care about works from the buttons on the desk, and don't hand over an account for a piece of furniture unless you actually want to. If you're wondering which connected gadgets earn their keep, the smart home rule applies here too.

Standing all day isn't the cure. Standing still for hours brings its own aches in the feet and lower back. Plenty of standing desks end up parked at sitting height forever, holding up a monitor and a guilty conscience.

The chair still does most of the work. You'll probably sit for more of the day than you stand. Grandpa's chair is worth keeping because it does the basics. The seat height adjusts so his feet sit flat and his thighs are about level. The back supports the curve of his lower back. The armrests sit low enough to clear the desk edge. It also takes standard parts. He's replaced the casters twice and the gas cylinder once. If your chair checks those boxes, keep it and spend the money on the desk.

Two safety points, no joke attached. A moving desk has pinch points. Keep kids' hands and pets clear when it's moving, and use the child lock if your keypad has one. And a chair's gas cylinder is pressurized. Never cut, heat or pry one apart. Follow the maker's replacement instructions or have a shop do it. These desks are also heavy, so assemble them with two people.

Where he is wrong

He admitted it in week three, which is fast for him.

The switching works. He stands for phone calls now and for the hour after lunch when the chair starts to feel like a nap. He'll tell you his back feels better in the afternoon. It's his back, so he gets to say so.

The presets earned their place too. Grandma uses the desk to pay bills, and she's a good eight inches shorter than he is. On a fixed desk, one of them would always be working at the wrong height. Now she has floor three. Tap it, and it's right for her.

And he was wrong about the armrest standoff. For the first time in his life, the desk adjusts to the chair instead of the chair cranking itself to fit a desk somebody else chose. "That's the right way round," he said. "Should've been doing it this way since 1961."

When the grandkids visit, they do homework standing at it like a lab bench. He's quietly proud of that.

The verdict

Worth it, with conditions.

It's for anyone who spends long days at a desk, households where people of different heights share one workspace, and tall folks who've hunched over standard desks their whole lives. If you work at a desk an hour a day, try a converter first, or just stand up when the phone rings. Grandma's method costs nothing.

Keep the chair if it's good. Replace it only if it fails the basics.

Before you buy, check:

• The height range against your body. Stand in the shoes you work in, measure from the floor to your bent elbow, and make sure that number sits inside the maker's listed range. Do the same sitting down. Tall and short people get caught by this most.
• Stability and capacity. Read owner reviews for wobble at standing height, and make sure your gear comes in under the published weight limit.
• The warranty, line by line. Frames, motors and electronics are often covered for different lengths. Read the actual warranty document for what's covered, who pays shipping, and whether you have to register. Then check whether replacement parts are sold.

Then check the current price, and leave room in the budget for a power strip and some cable ties.

Grandpa's verdict was shorter. He raised the desk to standing height, rolled his chair to the corner, and said, "Two good tools. Neither one has to win."