Peloton announced Wednesday voluntary recalls of both its treadmill machines over safety concerns.

The announcement marked a major reversal of Peloton’s initial reaction, and comes after weeks of discussions with the U.S. Consumer Product Safety Commission.

In a statement, Peloton apologized for not acting more quickly to resolve the issue after reports of one death and dozens of injuries.

“I want to be clear, Peloton made a mistake in our initial response to the Consumer Product Safety Commission’s request that we recall the Tread+,” CEO John Foley said in a statement Wednesday. “We should have engaged more productively with them from the outset. For that, I apologize.”

Peloton shares tumbled more than 9% on the news.

The company is advising customers who already have either the Tread or Tread+ products to immediately stop using the equipment and contact Peloton for a full refund or other qualified remedy. It added it is working on a repair to be offered to treadmill owners in the coming weeks.

The recall affects about 125,000 Tread+ machines and roughly 1,050 Tread products in the U.S.

The CPSC said it has received 18 reports about the touchscreen loosening and six reports of the touchscreen detaching and falling from the Tread. The group had previously warned about Peloton’s Tread+ product last month, after one child died in an incident involving the machine and there were dozens of other reported injuries.

The agency said Peloton’s treadmills are designed differently than its peers, with “an unusual belt design that uses individual rigid rubberized slats or treads that are interlocked and ride on a rail.” That’s instead of a thinner, continuous belt. There is also a large gap between the floor and the belt of the Tread+, leaving room for things to wiggle their way under.

The commission simultaneously in April released a graphic video, captured by a home security camera, of a young boy being pulled under one of the Tread+ machines and struggling to free himself.

But Peloton pushed back on the recommended recall at the time, and told customers there was no reason to stop using its treadmills, so long as children and pets were kept out of the area while in use. The company had also recommended a key be used to lock the device after each workout.

Peloton said Wednesday that it will work with the CPSC to set new industry safety standards for treadmills.