Warehouses Are Tracking Workers’ Every Muscle Movement

Walmart and other companies are testing a monitoring device for workplace safety made by a startup called StrongArm.

An employee wears a StrongArm harness and device at a Geodis fulfillment center in Breinigsville, Pennsylvania, on Nov. 4.

Photographer: Michelle Gustafson/Bloomberg

Lock
This article is for subscribers only.

Every morning when he goes to work in the freezer room of a warehouse in eastern Pennsylvania, Jack Westley throws on a hooded sweatshirt to keep warm and grabs a radio to talk to his coworkers. He was recently given a new piece of equipment to wear, which he attaches to a harness over his shoulders. It’s a black device about the size of a smartphone that tracks his every move.

For Westley, a 36-year-old with tattooed arms and a sunny disposition, work means a full day of carrying boxes as ice slowly forms in his beard. The freezer is one of the more treacherous areas, according to the warehouse’s management, in part because workers get sloppy when they’re cold. So each time Westley bends too deeply to pick up a box or twists too far to set one down, the device on his chest vibrates to send a warning that his chance of getting hurt is elevated. Westley noticed he’d developed a habit of bending at the waist as he reached far into pallets to pull out boxes. “That might’ve been something they would vibrate on me for, but I started walking around to the sides of the pallets, you know, thanks to the reminder,” he says.