An exercise device includes a frame, two first swing arms, two second swing arms, two pedals, a resistance device, two cranks, two link rods, two supporting mechanisms, two rock rods, and two adjusting devices. Each first swing arm couples with the frame and has a lower end coupling with a first end of one second swing arm. Each second swing arm has a second end coupling with one pedal. Each crank has a first end coupling with the resistance device and a second end coupling with a first end of one link rod. Each link rod has a second end coupling with one second swing arm. Each rock rod has a first end pivotally coupling with a fulcrum of one supporting mechanism and a second end coupling with one second swing arm. Each adjusting device adjusts the distance between the second end of one rock rod and one fulcrum.

An oblong orbital exercising machine includes a main frame, an upright, a seat support, a cycle movement mechanism, two swinging handles, two drive bars, two pedal units and two adjustment units. Each of the pedal units includes a fixing plate, a rocking plate, two springs, two fastening rods and a pedal. Each of the two adjustment units includes a fixed disk, an adjusting disk, two limit stubs, a hollow rod, a hollow mounting sleeve and a positioning pull pin. Thus, when the pedal units are moved in concert with the drive bars, the pedal of each of the pedal units is adjusted to correspond to the oblong trace of movement. In addition, the user can adjust the position of each of the pedal units easily and quickly by operation of each of the two adjustment units.

An exercise device includes a frame, two first swing arms, two second swing arms, two pedals, a resistance device, two cranks, two link rods, two supporting mechanisms, two rock rods, and two adjusting devices. Each first swing arm couples with the frame and has a lower end coupling with a first end of one second swing arm. Each second swing arm has a second end coupling with one pedal. Each crank has a first end coupling with the resistance device and a second end coupling with a first end of one link rod. Each link rod has a second end coupling with one second swing arm. Each rock rod has a first end pivotally coupling with a fulcrum of one supporting mechanism and a second end coupling with one second swing arm. Each adjusting device adjusts the distance between the second end of one rock rod and one fulcrum.

The present invention relates to a transmission structure for changing sliding direction of a climber apparatus, which enables an operator to operate the apparatus in an upright position. The transmission structure includes: a base, a support, a first slide rail, a second slide rail, a first transmission unit, a second transmission unit, a first handle slider, a first footplate slider, a second handle slider, and a second footplate slider. During manufacture and assembly, the first handle slider, the first footplate slider, the second handle slider, and the second footplate slider are able to be respectively connected to a first drive member or a second drive member at different selected positions. Under the prerequisite that the left foot and right foot of the operator carry out alternate reverse treading throughout the exercise routine, different training modes can be selected.