Police and other emergency responders have long used the use of a hybrid-type trainer to train the body of a suspect or hostage.
The devices are made of plastic and rubber, which allows the wearer to move easily between various poses while still maintaining control over their body, said Michael Waggoner, chief of training at the National Association of State Police (NASSP).
The NASSP has more than 200 chapters nationwide.
The technology has been used by law enforcement agencies for decades.
In the 1980s, the FBI and LAPD were among the first to integrate the technology with its SWAT team training, said Waggoner.
The device, he said, has since been used in every branch of the military and law enforcement.
A new generation of hybrid trainers have been developed, Waggons said, which can accommodate more of the body and its movements.
One example is the Force Balance Trainer, a trainer that combines a trainer and a seat to provide the user with the same control as wearing a regular seat, said Brian A. M. Riesch, the chief operating officer of the ForceBalance Company.
The company’s website describes the device as a body-weight trainer with a seat.
It uses a flexible platform and armrest to balance the user, who sits on a foam platform and has his or her hands free for the purpose of controlling the position of the head, torso, shoulders, hips, arms, legs and feet, the company said.
The Force Balance is available in two different sizes, he added.
Some other companies have made hybrid trainers, which use a combination of an inflatable platform and a padded armrest that provide a more comfortable position.
The Nassp recommends using a trainer when you have a hostage or suspect who is restrained.
But Waggone said the most important consideration for training is the amount of movement.
The trainers should only be used when there is no other option, he told ABC News.