Beijing – Keep, a hybrid sports app and equipment maker, has chosen BASF's Infinergy expanded polyurethane thermoplastic for the beds of its latest range of running machines.
The company says it chose the material to help reduce the noise of people using its K2 smart treadmills in apartment blocks. In 2017, China Daily said there were 80m users of its fitness apps.
As well as helping to keep the noise down, Keep said the material offers superior elastic, shock-absorbing and high rebound properties. These make the exercise less damaging to the joints, and returns energy to the runner.