It is a 3-in-1 exercise bike that allows users to switch freely between the upright,semi-recumbent and recumbent types, ensuring it is suitable for a wide variety of people. 【3-in-1 Mode】This exercise bike is a combination of the upright bike,semi-recumbent bicycle and recumbent bike for physical therapy and burning calories.The recumbent option is suitable for seniors or people with knee injuries.