The invention (variants) relates to a field of sports and medicine, and it concerns training devices, namely, rotary training machines which are used for a simultaneous training of human should, pelvic girdles, and trunk muscles. The claimed invention is based on a task to create a rotary multi-function training machine for the simultaneous training of human shoulder girdle, pelvic girdle, and trunk muscles, while involving all groups of muscles in a balanced manner in order to provide a high quality and efficiency of the trainings at different usage modes of the training machine due to maintaining a synchronization of a rotation of shafts of load modules of the training machine by adjusting a relationship between their rotational speed and efforts applied thereto.

A fitness apparatus and a method for assembly are disclosed. The fitness apparatus comprises a wheel assembly that includes a first circular side parallel to a second circular side, both bounded by a curved tread. Within the wheel assembly is an enclosable storage chamber. The fitness apparatus also includes an axis perpendicular to the first circular side and the second circular side, and when the fitness apparatus is in an abdominal exercise wheel configuration, at least a portion of the wheel assembly rotates around the axis. The fitness apparatus also includes a centerbore along the axis that supports a first removable handle and a second removable handle when the fitness apparatus is in the abdominal exercise wheel configuration.

A damping device for exercise equipment is disclosed. The damping device includes a transmission unit, a tension unit, and a resistance unit. The transmission unit has a driven shaft and a driving wheel mounted around a middle section of the driven shaft. The driven shaft has two ends thereof provided with a first rotating wheel and a second rotating wheel, respectively. The resistance unit includes a resistance fan and an adjustable resistance member located outside and below the first rotating wheel and the second rotating wheel, respectively, so as to structurally achieve overall weight balance. When the tension unit receives a push/pull force, a woven ribbon connected between the tension unit and the driving wheel drives the driven shaft to rotate the first and second rotating wheels, thereby making the resistance fan rotate and making the adjustable resistance member output even and adjustable resistance.

A fitness apparatus and a method for assembly are disclosed. The fitness apparatus comprises a wheel assembly that includes a first circular side parallel to a second circular side, both bounded by a curved tread. Within the wheel assembly is an enclosable storage chamber. The fitness apparatus also includes an axis perpendicular to the first circular side and the second circular side, and when the fitness apparatus is in an abdominal exercise wheel configuration, at least a portion of the wheel assembly rotates around the axis. The fitness apparatus also includes a centerbore along the axis that supports a first removable handle and a second removable handle when the fitness apparatus is in the abdominal exercise wheel configuration.

A two-way row machine includes a base frame arranged to be in contact with the bottom surface; a standing frame coupled to the upper surface of the base frame and arranged to stand in the vertical direction; a footrest unit seated on the upper surface of the base frame and supporting a user's feet; a support unit fixed to the standing frame and the footrest unit, supporting a user's body, and adjustable in standing angle and height; a pair of rotation units link-coupled to the base frame and disposed inclined toward both lower sides of the support unit; a pair of handle units coupled to one end of each of the pair of rotation units, formed for the user to hold it to rotate the rotation unit, and adjustable in angle; and a pair of rotation stopper units coupled to the base frame.