An exercise device and methods for performing physical exercise that improve strength, conditioning, and flexibility of an operator in a functional way using multiple body positions and exercising multiple muscle groups while keeping the spine in a safe and natural position, being simple to manufacture and use, and being compact and portable. The exercise device includes an elongated member, a hollow member, handles, a foot board system, and at least one resistance band. A resistance band is secured to the elongated member and the hollow member, and slidable movement of the hollow member and the elongated member relative to each other by the operator stretches a resistance band, which creates resistance to the movement, thereby exercising, strengthening, and conditioning the operator. The operator may use the exercise device in a number of configurations to perform a number of exercises in a number of body positions.

Sensor data is collected from a sensor monitoring a tension generating device of an exercise machine. The sensor data is analyzed to determine whether the sensor data is within a specification. In an event that the sensor data is not within the specification, an error stop mode is entered for the tension generating device.

An upper trunk training system may include a connection module including an actuation link configured to be coupled to a user's trunk, an output link coupled to the actuation link, and a base frame configured to be coupled to the user's trunk. An upper trunk training system may include a variable stiffness module including a cam fixed to a cam shaft coupled to the base frame, a cam follower coupled to the base frame and biased toward the cam. An upper trunk training system may include a stiffness control module including a sun gear fixed to the cam shaft, a planetary gear coupled to the output link of the connection module and meshed with the sun gear, a ring gear meshed with the planetary gear, and an electric machine coupled to the ring gear to rotate the ring gear to increase a stiffness of the upper trunk training system.

A load transmission mechanism unit for a training device includes, in a housing portion: a grip shaft portion rotatable with a grip portion connected to a first end portion thereof; an intermediate shaft portion rotatable with the rotation of the grip shaft portion; a transmission portion suspended between the grip shaft portion and the intermediate shaft portion and transmitting a mutual rotation of the grip shaft portion and the intermediate shaft portion; a rotation conversion portion provided on a crank shaft portion transmitting the rotation of the intermediate shaft portion; and the crank shaft portion converting the rotation of the crank shaft portion into a vertical movement of a sliding shaft portion. The first end portion of the grip shaft portion is swingably supported by the housing portion, and a second end portion of the grip shaft portion swings within a shaft opening portion formed in the housing portion.

An exercise system comprising a clamp for securing or engaging a dumbbell. The system may include a cable connector and the clamp. The cable connector includes an aperture that is configured to engage a corresponding attachment of a cable. The clamp has an open configuration and a closed configuration. The clamp defines a first cavity and a second cavity. When the clamp is in the open configuration, the first cavity is configured to receive a portion of exercise equipment and the second cavity is configured to receive a portion of the cable connector. When the clamp is in a closed configuration, the clamp is configured to secure the cable connector relative to the exercise equipment.

An exercise machine is disclosed. The exercise machine comprises a motor, an actuator, an arm, and a cable. The cable is coupled between the motor and the actuator through the arm. The motor is configured to provide a nominal tension of resistance when an end of the cable is within a range of length from a zero point associated with the cable.

Provided herein are Methods and Systems For a Multi-Motor module system for a Resistance Training Machine, comprising a training program module and a programming framework; wherein a motor system module sets a mode of a drive system and motor hardware is operably coupled to an actuator to shift the drive system from a lower gear to a higher gear.

A terrain-adaptive weight training sled with free steering including: a main frame with first and second ends remote from each other; a resistance wheel rotatably disposed on the first end and having a damping structure; two rotatable and freely steerable omni-wheels disposed on both sides of the second end; and a pulling member having a connecting end, a user-operated end, and a flexible extension section, the connecting end being used to connect with the second end of the main frame and the user-operated end being used for the user to apply force for pulling. The height of the first end is lower than the second end, relatively causing the second end to have an upward inclination angle which is between 6 and 15. When the user pulls the second end to turn by the pulling member, the two omni-wheels are driven to produce a turning motion thereafter.

An exercise system includes a barbell handle, a first clamp, and a second clamp. The barbell handle includes a first handle end and a second handle end opposite the first handle end. A central axis extends from the first handle end to the second handle end. The first clamp is configured to selectively secure a first dumbbell to the first handle end and prevent rotation of the first dumbbell about the central axis. The second clamp is configured to selectively secure a second dumbbell to the second handle end and prevent rotation of the second dumbbell about the central axis. The first clamp and the second clamp each include a first portion, a second portion selectively pivoting with respect to the first portion between a closed position and an open position, and a fastener selectively securing the first portion and the second portion in the closed position.

An exercise machine is disclosed. The exercise machine comprises a motor, an actuator, an arm, and a cable. The cable is coupled between the motor and the actuator through the arm. The motor is configured to provide a nominal tension of resistance when an end of the cable is within a range of length from a zero point associated with the cable.