An exercising device in the form of a stationary rowing unit which can be used as a physical therapy aide having its main body portion lying substantially in a horizontal plane. The unit including a seat and arm assemblies foot pedal which are pivotally connected by a reciprocating cable and a pivotal tube assembly. The foot pedals being pivotally connected to the arm assemblies by rigid connecting rods and a pair of resistance cylinder means each pivotally mounted between respective foot pedals and the frame on opposite sides of the body for providing a desired resistance to movement by the user.

A foot training machine having two pedal assemblies the topmost edge of each of which being constantly maintained at the horizontal position for smooth stepping. The pedal of each pedal assembly has two opposite ends pivoted to two rocker arms which are equal in length. The two opposite ends of the two rocker arms are respectively pivoted to two shaft tubes spaced on the base of the machine. The two rocker arms are freely rotated on the two shaft tubes permitting the pedal to be constantly maintained at the horizontal position while stepping.

Foot treadle operated exercising apparatus of this invention provides for transfer of air from one foot treadle operated vertically disposed bellows to another through a restricted pathway adjustable in size by an adjustable valve to select a desired work load. A stroke length adjustment is featured for changing the length of the stroke. This is achieved with bellows that are biassed to return to an extended condition in the presence of atmospheric air. Thus with a closed air system, a manually operated air admission and venting valve will increase the bellows height when opened to admit atmospheric air and will decrease the bellows height when opened and pedals are depressed to vent air. The foot treadles are operable from a standing, sitting or lying position. An auxiliary arm exercise harness operates in conjunction with the foot operated treadles by means of hand manipulated lines cross connected so that the left hand will depress a right foot treadle and visa versa. The entire work load is effected by the transfer of air from one bellows to the other when the treadles are operated in a riding, jogging or climbing action. One embodiment provides for bicycle riding type of exercise activity.

A swing exerciser includes two stands with a shaft rotatable disposed therebetween, each one of the two stands having a swing member with one end thereof pivotally connected to the stand and the other end of the swing member having a plate, each of the two swing members having a link assembly pivotally connected thereto and the other end of each of the link assemblies fixedly and diametrically connected to a respective one of two ends of the shaft such that when a user swings one swing member, the other swing member is rotated in an opposite direction by a rotation of the shaft.

A striding exerciser includes a pair of post having a middle portion pivotally coupled to an upper portion of a base. The base has a rod rotatably supported in an upper and front portion. The rod has a lever secured to one end and extended upward and has another lever secured to the other end and extended downward. A pair of links pivotally couple the posts to the levers respectively so as to couple the posts together. One of the links is moved forward when the other link moves rearward, and is moved rearward when the other link moves forward.