This part of ISO 20957 specifies safety requirements for exercise bicycles with a fixed wheel or without freewheel, which have an inertia > 0,6 kg · m2 in addition to the general safety requirements of ISO 20957-1. This part of ISO 20957 should be read in conjunction with ISO 20957-1. This part of ISO 20957 is applicable to stationary training equipment type exercise bicycles with a fixed wheel or without freewheel (type 10) (hereafter referred to as training equipment) within the classes S and H. Any attachment provided with the exercise bicycle with a fixed wheel or without freewheel for the performance of additional exercises are subject to the requirements of ISO 20957-1.