ISO 20957-8.2017 specifies safety requirements for stepper, stairclimber and climber machines (hereafter called training equipment) performed from either a standing or sitting position. The requirements are in addition to the general safety requirements of ISO 20957‑1, with which ISO 20957-8.2017 is intended to be read in conjunction.

ISO 20957-8.2017 is applicable to stationary training equipment type stepper, stairclimber and climber training equipment, within classes S and H. Additional requirements are provided for accuracy class A.