Exerciser with combined stepping and twisting functions

An exerciser with combined stepping and twisting functions, comprising:

• a lower stationary support frame having an upright shaft fixed thereto;
• a stepper mechanism including:
• a base body mounted rotatably on said shaft and having a front portion and a rear portion,
• a pair of spaced pedal arms, each pedal arm having a pedal arm front end pivotably attached to said front portion of said base body, each pedal arm front end having a mounting member attached thereto, and each pedal arms having a pedal arm rear end portion extending from said front end toward said rear portion of said base body, and
• a pair of resistance cylinders, each of which is pivotably connected between said pedal arm rear end portion of a respective one of said pedal arms and said base body;
• a plate member rotatably mounted to said shaft above said base body and having two opposite spaced mounting protrusions on two sides of said shaft, and having means for locking releasably said plate member on said shaft so as to prevent movement of said plate member relative to said stationary support frame;
• and
• a pair of elongated connecting members, each elongated connecting member having a connecting member front end connected to a respective one of said mounting members of said pedal arms and a connecting member rear end connected to a respective one of said mounting protrusions of said plate member,
• wherein, when said means for locking releasably said plate member, is locking said plate member to said shaft, one of said elongated connecting members pulls said plate member so as to cause rotation of said base body about said shaft relative to said stationary support frame when pressure is applied to a respective one of said pedal arms to cause downward turning thereto.