A foldable jogging machine comprises a handrail frame having two bottom rods which are provided in the midsegment with two upright rods and in the front end with a roller. A machine platform has a front end which is located at the bottom of the handrail frame, and a rear end which is provided with at least one roller. Two connection rods are pivoted at one end to the front end of the two bottom rods of the handrail frame, and at other end to the front segment of the machine platform. The machine platform can be turned on the pivoting position of the two connection rods such that the machine platform is rested against the handrail frame.
An amphibious foldable treadmill includes: a main frame having at least a wheel rotatably mounted on a base of the main frame to be rolled on a ground floor or on a pool bottom, a tread belt device pivotally secured to the main frame and unfolded from the main frame to be laid on the floor or pool bottom for treading operation, and a hand rail device pivotally secured to the main frame and pivotally connected with the tread belt device, whereby upon folding of the hand rail device and the tread belt device to the main frame, the treadmill can be folded for convenient handling, moving, launching in a pool or landing on the ground floor from the pool for successfully serving as an amphibious treadmill.
