A load transmission mechanism unit for a training machine includes a main driving shaft portion having an end portion connected to an input portion to which a user inputs a force, and configured to rotate together with the input portion; an intermediate shaft portion configured to rotate in conjunction with the rotation of the main driving shaft portion; a first rotation transmission unit suspended between the main driving shaft portion and the intermediate shaft portion, and configured to transmit the rotations of the main driving shaft portion and the intermediate shaft portion to each other; and a second rotation transmission unit provided between the intermediate shaft portion and a crank shaft portion which is orthogonal to the intermediate shaft portion, and configured to transmit the rotation of the intermediate shaft portion and a rotation of the crank shaft portion to each other.

A weightlifting rack assembly includes a weightlifting machine mounted on a frame having a plurality of frame members joined together. The machine includes at least one adjustable pulley assembly mounted on the frame, a weight source mounted on the frame, and a first cable having at least one adjustable input point defined by the adjustable pulley assembly, which is engaged with the weight source. The weightlifting machine also includes at least one fixed pulley assembly mounted on the weight rack, and a second cable having at least one fixed input point defined by the fixed pulley assembly and configured as a lat pull or low row input point. The assembly uses a double peanut pulley that is engaged by both cables, such that the first cable is provided with a 2:1 mechanical advantage, and the second cable is provided with a 1:1 mechanical advantage, in lifting the weight source.

A counterweight mechanism for use with a weightlifting machine including first and second input cables. The mechanism includes a peanut pulley having a top wheel configured to engage the first input cable, two bottom wheels, a counterweight pulley positioned below the peanut pulley and having a counterweight pulley frame and a counterweight pulley wheel mounted therein, where the counterweight pulley wheel engages the second input cable, and a counterweight positioned below the counterweight pulley, such that the counterweight pulley is positioned between the counterweight and the peanut pulley. Two counterweight cables each have ends fixed to the counterweight pulley frame and to the counterweight, and the counterweight cables are engaged with the bottom wheels of the peanut pulley. A weight rack assembly including the counterweight mechanism may also include a removable low row assembly and/or a removable box squat assembly.

In one embodiment, a kinetic shape is designed by determining an applied force to be applied to an object that is to incorporate the kinetic shape, determining a reactive force that is desired to be produced in response to the applied force, inputting the applied force and the reactive force into a kinetic shape equation, and solving the equation to obtain the kinetic shape.

A cable system for use with an exercise machine include a cable cam for engagement with the exercise machine and to support a first attachment, the cable cam having a carriage to engage with a vertical post and to traverse vertically along the vertical post; a cam wheel supported by the carriage, the cam wheel operable via the first attachment to create resistance to the first attachment; and a first receiving port extending from the carriage and coupled to the cam wheel, the first receiving port receives the first attachment to couple the first attachment to the cam wheel; a lower cable supported by the cam wheel and extending from the cam wheel to a cable support system, the cable support system extending the lower cable to one or more weights; operation of the first attachment engages the one or more weights to create resistance.

A coupling mechanism for an exercise apparatus is disclosed. The coupling mechanism may include a resistance source coupled with a housing, a rod coupled to the resistance source, a clevis coupled to the rod, and a cam rotatably coupled to the clevis about an axis. The cam may include a curved outside surface with a first channel, and a curved inside surface with a second and third channel. The coupling mechanism may also include a cable key coupled to the cam and several cables.

A load transmission mechanism for training apparatus is disclosed, comprising a main drive shaft unit, an intermediate shaft unit, and a perpendicular shaft unit. The mechanism utilizes a transmission chain and sprockets to transfer rotational force, with bevel gears enabling a change in rotational direction. The system includes a load applying unit that allows for adjustable tension, making it suitable for various training intensities. The gripping portion may be annular, enhancing user interaction. This mechanism is designed to provide smooth and adjustable resistance, improving the effectiveness and versatility of training apparatus.

In one embodiment, a kinetic shape is designed by determining an applied force to be applied to an object that is to incorporate the kinetic shape, determining a reactive force that is desired to be produced in response to the applied force, inputting the applied force and the reactive force into a kinetic shape equation, and solving the equation to obtain the kinetic shape.